| In Situ Remediation of Low-Volatility Fuels Using Bioventing Technology |
SEP 1993 |
41 pages |
| Authors:
Jeffrey A. Kittel; Ronald E. Hoeppel; Robert E. Hinchee; Thomas C. Zwick; Richard J. Watts; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
 | Data were collected at four U.S. Navy and Marine Corps bases to evaluate bioventing technology efficacy in removing low-volatility fuels from subsurface soils and the groundwater table. These sites have soil contamination attributed to spills or leaks of fuels having low vapor pressures and very low water solubilities, such as JP-5 jet fuel, diesel fuel, #6 fuel oil (bunker fuel), waste oil, and lubricants. The ... |
|
| SIMBAT Theoretical Manual |
AUG 93 |
81 pages |
| Authors:
Leon E. Borgman; Warren A. Bartel; David R. Shields; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This manual develops the theory of the Conditional Ocean Wave Simulation Model (SIMBAT). SIMBAT is a high performance FORTRAN F77 based computer model that uses the Fast Fourier Transform (FFT) to produce ocean wave properties for ocean engineering applications. The model assumes the wave properties form a Gaussian stochastic process. SIMBAT may be used to perform a conditional or unconditional simulation. A conditional simulation uses a measured or existing input ... |
|
| SAP IV Version 1.0. A Structural Analysis Program for Static and Dynamic Response of Linear Systems (Computer Diskette). |
26-Jul-1993 |
|
| Authors:
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
 | File characteristics: Software (8 files). Physical description: 1 computer diskette; 5 1/4 in.; high density; 1.2MB. System requirements: IBM-PC compatible; MS-DOS 3.1 or higher; DOS copy. SAP IV is a general purpose finite element analysis program for linear structural analysis. The program can analyze structures that are subject to either static or dynamic loads. The structures can be described in terms of truss, frame, plate, shell, or brick elements or ... |
|
| Horizontal Drilling System (HDS) Operations Theory Report |
JUL 93 |
80 pages |
| Authors:
J. V. Wilson; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The Naval Civil Engineering Laboratory (NCEL) has developed a prototype horizontal drilling system (HDS) that is designed to reach distances of 10,000 to 15,000 feet and should be capable of reaching 25,000 feet in favorable conditions. This system uses high pressure water (15,000 psi) to 'drill' at rates of 10 to 30 in./min. Steering is accomplished by instructing the drillhead (nozzle) to cut in an eccentric pattern. As part of ... |
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| The Effects of High Temperature on Structural Concrete in Navy Firefighting Training Facilities |
JUN 93 |
100 pages |
| Authors:
B. Davis; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| An investigation was completed on the effects of high operational temperatures on a Navy firefighting training facility at the Naval Training Center, Mayport, Florida. Concrete temperature measurements were made during a simulated maximum use training cycle, core samples were retrieved and examined, and predictions of concrete thermal performance were made with a finite element model. It was concluded that the concrete had not deteriorated and should perform well for years ... |
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| Structured Finite Volume Modeling of U.S. Navy Aircraft Engine Test Cells Task 2: Turboprop Engine Vol 1 |
JUN 93 |
59 pages |
| Authors:
P. L. Daley; W. A. Mahaffey; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report presents results of the numerical simulation of a U.S. Naval turboprop test cell facility. The ultimate purpose of this simulation was to provide the Navy with a numerical model to be used for the evaluation of the aerothermal performance of test cells. This simulation was performed using the structured finite volume (SFV) computer code. A description of the physical model, mathematical details, boundary conditions, and results of the ... |
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| Liquefaction-Induced Lateral Spread Displacement |
JUN 93 |
58 pages |
| Authors:
T. L. Youd; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Lateral ground displacements generated by liquefaction-induced lateral spread are a severe threat to the Navy's shore facilities. During past earthquakes, lateral spread displacements have pulled apart or sheared shallow and deep foundations of buildings, several pipelines and other structures and utilities that transect the ground displacement zone, buckle bridges or other structures constructed across the toe, and toppled retaining walls, bulkheads, etc. that lie in the path of the spreading ... |
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| Nonlinear Wave Forces on Large Ocean Structures |
APR 93 |
53 pages |
| Authors:
Erick T. Huang; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This study explores the significance of second-order wave excitations on a large pontoon and tests the feasibility of reducing a nonlinear free surface problem by perturbation expansions. A simulation model has been developed based on the perturbation expansion technique to estimate the wave forces. The model uses a versatile finite element procedure for the solution of the reduced linear boundary value problems. This procedure achieves a fair compromise between computation ... |
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| Construction Diver Lift Systems |
MAR 93 |
40 pages |
| Authors:
Hugh G. Thomson; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| A diver-operated lift system has been developed for underwater construction divers. The system consists of three different open-bottom lift bags with the following lift ranges: 200 to 550 pounds, 500 to 1,250 pounds, and 1,000 to 3,000 pounds. The system maintains a constant buoyancy during ascent by venting the expanding air volume out under the slider of a zipper, which is attached to the side of the bag along the ... |
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| User's Guide - Seismic Hazard Analysis |
FEB 93 |
127 pages |
| Authors:
J. M. Ferritto; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| An automated procedure has been developed to perform seismic analysis using available historic and geologic data. The objective of the seismicity study is to determine the probability of occurrence of ground motion at the site. Response spectra and time history techniques are presented.... Earthquake, Seismic, Response spectra, Time history, Site acceleration. |
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| Development of Procedures for Computing Site Seismicity |
FEB 93 |
130 pages |
| Authors:
John Ferritto; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report was prepared as part of the Navy's Seismic Hazard Mitigation Program. The Navy has numerous bases located in seismically active regions throughout the world. Safe effective design of waterfront structures requires determining expected earthquake ground motion. The Navy's problem is further complicated by the presence of soft saturated marginal soils that can significantly amplify the levels of seismic shaking as evidenced in the 1989 Loma Prieta earthquake. The ... |
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| Optimal Tuning of Heavy Equipment Motion Controllers |
FEB 93 |
102 pages |
| Authors:
William V. Miller; William N. Varnava; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The objective of this work is the demonstration of feasibility of computerized optimal tuning of electronic motion controllers for mobile heavy equipment end-effectors. A backhoe yaw mode position control system was selected as the application for the purpose of proof of concept. The control algorithm selected for use in the servocontroller is Pseudo-Derivative Feedback (PDF). A computer model and an operational laboratory model of a translational electrohydraulic position control system ... |
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| Impact Load Method for Structural Assessment of Piers and Bridges |
JAN 93 |
67 pages |
| Authors:
George Warren; Ronald Shope; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| NCEL examined the Impact Load Method (ILM) to elicit a response from bridges and piers as a means of structural assessment. Stiffness changes were detected that were correlated to loss of structural function from material damage and deterioration. Parametric studies were performed on a one-third scale model pier and a highway bridge using finite element modeling that was verified by ILM tests. Studies showed that the ILM is sensitive to ... |
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| A Plasticity Model for the Bond between Matrix and Reinforcement |
93 |
|
| Authors:
James V. Cox; Leonard R. Herrmann; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Micromechanical models of reinforced composite systems require constitutive models for the materials and their interaction. Material constitutive models have been the subject of extensive research, however, bond models have not. The type of composite systems of interest in this study are those where the reinforcement is in the form of long filaments, wires or rods. We initially propose a six degree of freedom plasticity model for describing the interaction between ... |
|
| Validation of the SEADYN90 Cable Simulation Model Using a Three- Dimensional Cable Deployment Data Set |
DEC 92 |
70 pages |
| Authors:
Paul Palo; Linda Teragouchi; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report presents data from a full-scale, three-dimensional cable payout test and the corresponding numerical simulations using the SEADYN90 computer model. The experiment, which was conducted at the Atlantic Undersea Test and Evaluation Center (AUTEC), deployed 10 miles of 3/4-inch-diameter cable from a vessel that followed a predetermined course. Ship position, cable payout rate, and current profile were measured, along with 11 cable descent trajectories at predefined intervals along the ... |
|
| Three-Dimensional Finite Element Analysis of Explosive Safety Facilities - A Technology Assessment |
DEC 92 |
152 pages |
| Authors:
T. A. Shugar; T. J. Holland; L. J. Malvar; D. A. Doi; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| To establish research requirements for development of modern, specialized software for computational structural dynamics in support of Navy explosive safety facilities, NCEL conducted baseline studies to assess commercial or currently available general purpose computer programs. Two widely available general purpose computer programs for three-dimensional nonlinear dynamic finite element analysis were applied to three types of reinforced concrete structures of interest to Navy explosive safety facility designers: (1) a novel cylindrical ... |
|
| SAP IV User's Guide. Version 1.0. A Structural Analysis Program for Static and Dynamic Response of Linear Systems |
DEC 92 |
118 pages |
| Authors:
F. R. Johnson; T. J. Holland; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| SAP IV is a general purpose finite element analysis program for linear structural analysis. The program can analyze structures that are subject to either static or dynamic loads. The structures can be described in terms of truss, frame, plate, shell, or brick elements or combinations of elements. The static loads include concentrated loading applied to discrete points on the structural models; and loads, concentrated loading applied to discrete points on ... |
|
| Three-Dimensional Finite Element Modeling of Confinement Stress for Projectiles Embedded in Rock - A Preliminary Study |
NOV 92 |
108 pages |
| Authors:
Larry R. Hoge; T. A. Shugar; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The explicit three-dimensional finite element computer program DYNA3D was applied to the problem of modeling penetration of anchor projectiles into seafloor rock media. It was used to computer the dynamic response and the residual stresses and strains for an axisymmetric penetration model where the penetrator axis and velocity vector are normal to the seafloor. Homogeneous nonlinear material behavior is considered for both the anchor projectile and the seafloor rock material, ... |
|
| Conceptual Study of a Module Connector System for a Deployable Waterfront Facility |
OCT 92 |
49 pages |
| Authors:
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report presents three conceptual methods for connecting barge- like modules in open seas. The goal is to identify new technology and materials for use in the development of a high strength connecting system that can be installed fast in open seas with limited heavy lift equipment. The three concepts presented are: flat, flexible connector with pneumatic bladders, cylindrical, flexible connector with pneumatic bladders, and flat, flexible connector with a ... |
|
| An Experimental Examination of the Thermal and Acoustic Environments on Runway Joint Seals |
SEP 92 |
107 pages |
| Authors:
E. E. Cooper; C. Dahl; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| A test series was conducted at Edwards Air Force Base to determine noise and temperature environments that joint seal materials experience on an operational runway. Impingement of exhaust flow from jet engines creates an aerothermal environment for joint seal materials that contributes to, and accelerates, the deterioration and failure of joint seals. The aerothermal environment consists of noise (considered in this report as acoustically-induced as well as flow-induced fluctuations) and ... |
|
| Applications of Finite Element Technology to Reinforced Concrete Explosives Containment Structures |
20 Aug 1992 |
28 pages |
| Authors:
T A Shugar; T J Holland; L J Malvar; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Two widely available general purpose computer programs for three-dimensional nonlinear dynamic finite element analysis were applied to three types of reinforced concrete structures of recent interest to Navy explosive safety: a novel cylindrical missile test cell concept, flat slabs with variable shear steel, and a soil-covered roof slab for a new high performance magazine concept. Results from codified single-degree-of-freedom (SDOF) methods for design of explosive safety structures were considered and ... |
|
| Small-Scale High Performance Magazine Roof and Soil Cover Feasibility Test Results |
Aug 1992 |
42 pages |
| Authors:
Robert N Murtha; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The High Performance (HP) Magazine concept consists of an earth-covered box structure with interior cells where munitions are stored. The cells are designed to prevent sympathetic detonation between cells, thereby limiting the Maximum Credible Event (MCE) to the Net Explosive Weight (NEW) stored in any cell. The reinforced concrete box structure and soil cover and designed to limit the safe distance for the MCE from blast, fragment, and debris outside ... |
|
| Acceptor Loads and Response of an Intervening Sand Wall Barrier from the Simultaneous Detonation of 24 Mk82 Donors |
Aug 1992 |
15 pages |
| Authors:
R D Eisler; A K Chatterjee; L Pietrzak; James Tancreto; Kevin Hager; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The loads incident on Mk82 acceptors located two feet from the acceptor side of an intervening 3.5 foot sand wall were evaluated with the aid of hydrocodes, literature, and closed form solutions. The donor side of the sand wall was subject to the simultaneous detonation of a 4 by 6 array of 24 Mk82 donors. The leading edge of the donor array was located at a two foot standoff from ... |
|
| Mitigation of Confined Explosion Effects by Placing Water in Proximity of Explosives |
Aug 1992 |
30 pages |
| Authors:
W A Keenan; P C Wager; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Water, placed in the near proximity of a confined explosion, can mitigate the gas pressure loading developed inside a structure confining an explosion. This phenomenon can be exploited in the design and operation of new and existing facilities exposed to a potential internal explosion. This water concept offers the potential for major savings in the cost for explosives safety of ordnance facilities from accidental explosions, for survivability of combat facilities ... |
|
| AUTODYN 2D Predictions for Small Scale HP Magazine Cell Wall Tests |
Aug 1992 |
31 pages |
| Authors:
Kevin Hager; James Tancreto; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The Naval Civil Engineering Laboratory is developing a new magazine concept that will reduce the land area encumbered by ESQD arcs and improve the efficiency of weapons handling operations. This new High Performance Magazine (HP Magazine) can reduce encumbered land by 80% and significantly reduce operational costs. The most important factor in the improved performance of the HP Magazine is the reduction of the Maximum Credible Event (MCE) to the ... |
|
| In Situ/on-Site Biodegradation of Refined Oils and Fuels (A Technology Review). Volume 1 |
JUN 92 |
193 pages |
| Authors:
Eve Riser-Roberts; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This extensive literature review covers all aspects of in situ and on-site bioremediation of gasoline, middle distillate fuels, and other refined petroleum products, using information available through 1988. Topics covered include: composition of different fuels, factors affecting biodegradation rates, responsible microorganisms, degradation pathways, factors enhancing biodegradation, and potential limitations. This report is in three volumes. Volume 1 covers general information of most interest to managers and non- specialists. Volume 2 ... |
|
| In Situ/On-Site Biodegradation of Refined Oils and Fuels (A Technology Review). Volume 2. Appendix A. Supplementary Text |
JUN 92 |
229 pages |
| Authors:
Eve Riser-Roberts; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This extensive literature review covers all aspects of in situ and on-site bioremediation of gasoline, middle distillate fuels, and other refined petroleum products, using information available through 1988. Topics covered include: composition of different fuels, factors affecting biodegradation rates, responsible microorganisms, degradation pathways, factors enhancing biodegradation, and potential limitations. This report is in three volumes. Volume 1 covers general information of most interest to managers and non- specialists. Volume 2 ... |
|
| In Situ/On-Site Biodegradation of Refined Oils and Fuels (A Technology Review). Volume 3. Appendices B to F |
JUN 92 |
166 pages |
| Authors:
Eve Riser-Roberts; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This extensive literature review covers all aspects of in situ and on-site bioremediation of gasoline, middle distillate fuels, and other refined petroleum products, using information available through 1988. Topics covered include: composition of different fuels, factors affecting biodegradation rates, responsible microorganisms, degradation pathways, factors enhancing biodegradation, and potential limitations. This report is in three volumes. Volume 1 covers general information of most interest to managers and non- specialists. Volume 2 ... |
|
| Ground Motion Amplification and Seismic Liquefaction: A Study of Treasure Island and the Loma Prieta Earthquake |
JUN 92 |
86 pages |
| Authors:
J. M. Ferritto; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report is part of the Navy's Earthquake Hazard Mitigation Program. It describes the effects of the Loma Prieta earthquake on Naval Station, Treasure Island focusing on geotechnical comparison of performance of marginal and improved sites. Procedures are presented to estimate settlements and results are compared to observed data. A detailed analysis of ground motion is presented in conjunction with site amplification. It is shown that the site amplification at ... |
|
| Annular Vortex Combustion (AVC) Development for Space/Water Heating Applications |
JUN 92 |
140 pages |
| Authors:
Tim T. Fu; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This is the final report for Annular Vortex Combustor (AVC) development for commercial applications. The work culminated in the successful demonstration of a 2-MB/H proof-of-concept (POC) model firing coal-water slurry fuel (CWF) and dry pulverized coals. This development was concerned with a new concept in combustion for which there was a general lack of relevant information. The work began with a cold flow modeling study and with the design and ... |
|
| Stereo Vision System - Load Acquisition Tests |
APR 92 |
|
| Authors:
William V. Miller; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The subject tests provided the basis for evaluation of the potential benefits of application of stereo vision systems (SVS) to tough terrain extendable boom forklifts (EBFL) for the purpose of assisting the vehicle operator with cargo acquisition and placement. The SVS, a three-dimensional imaging system with a stereoscopic camera, includes a (stereo) video monitor located in the cab which provides the operator with an unimpeded three- dimensional view of the ... |
|
| Installation Restoration: Navy Landfills and EPA Cover Guidance |
MAR 92 |
129 pages |
| Authors:
L. Karr; J. Dhooge; A. Walker; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The Navy has 229 hazardous waste landfills that must be treated or capped. Treatment of these wastes is often complicated and expensive due to the wide range of contaminants present. Current technology does not meet the needs for remediating all 229 sites. An alternative to treatment is to design a long- term cover, or cap, for the landfill. Current EPA guidance allows for modifications which may reduce costs and increase ... |
|
| Final Feasibility Report on Chemical Treatment of Sodium Nitrite Wastewater |
MAR 92 |
38 pages |
| Authors:
T. Y. Lee; Bingham Y. Pan; Henry P. Sheng; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report on the sodium nitrite wastewater treatment process discusses the results of 12 simulation runs and six test runs using the boiler hydroblasting wastewater from the Long Beach Naval Shipyard (LBNSY). Reproducible results were obtained showing the total destruction of sodium nitrite by sulfamic acid in Navy boiler hydroblasting wastewater. The removal of heavy metals was equally successful, an approach which resulted in reducing nearly all the ions to ... |
|
| Rating Lift Cranes Operating on Platforms in the Ocean Environment SAE J-1366--Proposed SAE Recommended Practice (Version 4.0) |
MAR 92 |
162 pages |
| Authors:
Frank R. Johnson; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report presents the computation procedure that is used to produce load rating charts for cranes operating on platforms in the ocean environment. A rating charge defines the load that can be safely lifted for each boom angle in the boom operating range. The platform supporting the crane may be a fixed offshore platform or a ship or barge. During the crane operating cycle, loads will be lifted from or ... |
|
| Seawater Ballast Pump |
JAN 92 |
27 pages |
| Authors:
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
|
| Paint Removal Using Cryogenic Processes |
JAN 92 |
44 pages |
| Authors:
Richard E. Kirts; Philip L. Stone; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The use of a high-pressure jet of cryogenic fluid (e.g., liquid nitrogen at -320 deg F) to remove paint and other protective coatings from Navy aircraft and ships was studied. The objective of the work was to explore the feasibility of developing a paint removal method that is less harmful to the environment than the chemical paint stripping methods presently in use. It was learned that only thick (t >0.020 ... |
|
| Anaerobic and Aerobic Degradation of Aromatic Hydrocarbons Using In-SituBioreactors at an Unleaded Gasoline Spill Site |
1992 |
9 pages |
| Authors:
Mary P. Huxley; Carmen Lebron; Martin Reinhard; Harry Ball; Harry L. Ridgway; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Unleaded fuel has leaked from an underground storage tank and spread 100 M radially in the saturated and unsaturated zone under a clay cap of soil. The estimated amount of fuel spilled in the saturated zone is 10,000 L. Four bioreactors have been installed in the ground at the site, one dedicated to aerobic and three to separate anaerobic conditions: methanogenic, nitrate- reducing and sulfate-reducing. ... |
|
| Repair, Evaluation, Maintenance, and Rehabilitation Research Program. Underwater Stilling Basin Repair Techniques Using Precast or Prefabricated Elements |
DEC 91 |
97 pages |
| Authors:
R. D. Rail; H. H. Haynes; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The purpose of this study was to investigate methods of repairing stilling basins of hydraulic structures underwater, thereby eliminating costly dewatering operations, and to develop a plan to evaluate products or concepts. The effort focused on methods using precast concrete or prefabricated steel panels. This report reviews underwater repairs of the Old River Low Sill Control Structure, Upper St. Anthony Falls Lock, and Kinzua Dam. An overview of the required ... |
|
| SIMBAT User's Manual |
NOV 91 |
241 pages |
| Authors:
Leon E. Borgman; Warren A. Bartel; Robert F. Zueck; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This manual describes the operation and instructions for execution of the Conditional Ocean Wave Simulation Model (SIMBAT). SIMBAT is a high performance FORTRAN F77 based computer model that uses the Fast Fourier Transform (FFT) to produce ocean wave properties for ocean engineering applications. The model assumes the wave properties form a gaussian stochastic process. SIMBAT may be used to perform a conditional or unconditional simulation. A conditional simulation uses a ... |
|
| Advanced Finite Element Analysis of Drydocks and Waterfront Facilities. A Technology Assessment |
OCT 1991 |
149 pages |
| Authors:
T. A. Shugar; T. J. Holland; L. J. Malvar; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Various models of Navy waterfront structures are presented and employed to assess their effectiveness in predicting the vulnerability of these systems to operational and earthquake loads. The emphasis is on application of three dimensional finite element models to reinforced concrete structural analysis. Results indicate that dynamic analysis is important in the calculation of the structural response of both a drydock and a blocked vessel in drydock. The primary natural frequencies ... |
|
| Recycling of Hydroblasting Wastewater |
OCT 91 |
83 pages |
| Authors:
Bingham Y. Pan; Brian Swaidan; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| The objective of this project undertaken by the Naval Civil Engineering Laboratory (NCEL) is to develop a recycling technology for reducing the volume of boiler hydroblasting wastewater at Naval Shipyards by up to 90 percent. Steam boiler tubes of a Navy ship undergoing regular overhaul are cleaned twice by hydroblasting. The first washing is performed before ship overhaul and the second washing after ship overhaul. The initial feasibility study, completed ... |
|
| Environmental Effects of Small Arms Ranges |
OCT 91 |
76 pages |
| Authors:
J. C. Heath; L. Karr; V. Novstrup; B. Nelson; S. K. Ong; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report attempts to locate and evaluate information in the following general subject areas: contaminant concentrations normally present at sites, normal background levels of identified contaminants, toxicity information on identified contaminants, regulatory controls and considerations, and identification and classification of small arms ranges that are controlled by the Navy. This report consists of a literature search of data and studies of environmental contamination at small arms ranges; geochemical equilibria modeling ... |
|
| Safety Window Shield to Protect against External Explosions |
JUL 91 |
41 pages |
| Authors:
R. L. Shope; W. A. Keenan; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This paper describes the conceptual design, predicted performance, and development plan for a new lost-cost design concept being developed for safety windows in both new and existing buildings. The concept protects the building interior against effects from accidental explosions outside the building, including blast overpressures, fragments, and debris. The shield transfers the applied window loads to the wall-ceiling and wall-floor joints where the building is inherently strong. This vastly reduces ... |
|
| A Generalized Intact Stability Analysis Procedure for Modular Construction Platforms |
JUN 91 |
68 pages |
| Authors:
T. Huang; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report presents a generalized numerical procedure for evaluating the responses of a modular construction floating platform subjected to static loads. The theory employed is applicable to watertight pontoon platforms undergoing unlimited rotations. This procedure enables users to investigate platform stability under various deck load configurations. Users are able to design a pontoon platform with prefabricated modules, check the platform for static stability, and modify the platform in a sequence ... |
|
| Bond of Reinforcement Under Controlled Confinement |
JUN 91 |
46 pages |
| Authors:
L. J. Malvar; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Twelve specimens were tested to determine the local bond stress-slip characteristics of a No. 6 rebar embedded in a 3-inch diameter concrete cylinder. Radial confining stress around the concrete specimen and radial deformation were assumed to be fundamental variables, together with bond stress and slip, needed to properly describe the interface behavior. Configuration independent bond stress-slip, relationships for a short five-lug embedded length were obtained for various degrees of confining ... |
|
| Lateral Load Distribution in One-Way Flat Slabs |
MAY 91 |
65 pages |
| Authors:
G. E. Warren; L. J. Malvar; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Results of laboratory model tests, inservice pier tests, classical plate theory, and finite element analyses provide the basis for changes in Military Handbook 1025/1 addressing flat slab pier dock design to distribute truck crane outrigger loads. The concentrated load distribution efficiency of Navy pier slabs can be doubled over current AASHTO allowables. For pier deck designs where large, truck-mounted cranes dominate load requirements, this will result in higher load capacity, ... |
|
| Energy Conserving Coating - Pigment Research |
MAY 91 |
48 pages |
| Authors:
Thomas Novinson; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| This report documents research into novel experimental paints made from color-reversible pigments. These pigments are of two types: Photochromic and thermochromic. The first group changes color on exposure to light, and the second changes color when subjected to a change in temperature. If successfully incorporated into a coating and applied to walls and roofs, these pigments could reduce heating and cooling costs by presenting a more absorbent color in the ... |
|
| Seawater Hydraulics: A Multi-Function Tool System for U.S. Navy Construction Divers |
MAY 91 |
99 pages |
| Authors:
J. P. Kunsemiller; S. A. Black; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| A set of three rugged divers' tools - rotary impact tool, a bandsaw, and a rotary disk tool - each powered by an interchangeable 3-horsepower seawater hydraulic motor, have been developed for the construction diver. The tools are supplied hydraulic power by a high-pressure seawater pump driven by a diesel engine. This pump provides filtered seawater at 14 gpm and 2,000 psi in an open circuit system. The objective for ... |
|
| User Data Package for Compressed Natural Gas (CNG) Vehicles for Navy Applications |
APR 91 |
137 pages |
| Authors:
Norman L. Helgeson; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Limits on environmental emissions from motor vehicles continue to be reduced by both federal and local regulatory bodies. 1990 legislation has established requirements for the use of alternatively-fueled fleet vehicles by 1994 in some parts of the country. Also, the availability of petroleum-based vehicular fuels is again being questioned. To address these concerns the Navy undertook experimental operation of a five-vehicle, compressed natural gas (CNG) vehicle fleet. Experience gained in ... |
|
| Literature Review: Computer Aided Assessment Techniques for Nonpoint Source Discharges |
APR 91 |
66 pages |
| Authors:
J. C. Heath; L. A. Karr; L. W. Canter; M. Lahlou; T. A. Cooper; NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA
|
| Computer models and Geographic Information Systems (GISs) are valuable tools for assessing nonpoint source discharges. Because of the diffused nature and variable flow associated with storm water run-off, it is difficult to design an inexpensive sampling program to assess the impact of nonpoint source pollution. Computer modeling and GISs can help process limited data and make assessments of nonpoint source discharges from both surface water and groundwater sources. Modeling approaches ... |
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