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Recent earthquakes have clearly demonstrated the seismic vulnerability of bridges constructed with steel superstructures. The relative flexibility of these bridges, especially in the transverse direction, may result in overstressing or even failure of
The majority of residential construction in the United States is wood-frame construction. These buildings perform well under gravity loads, but considerable damage has been observed in such structures after significant earthquakes and major hurricanes
Takashi Kashiwagi, John R. Shields, Richard H. Harris Jr., Rick D. Davis
The effects of resin molecular weight, M w, on the flame retardant mechanism of silica were studied using two different molecular weights of PMMA, 122,000 g/mol and 996,000 g/mol and two silicas, fused silica with a low surface area and silica gel with a
The Loop Equation Design Method has been proposed for sizing ventilation airflow components of natural and hybrid ventilation systems. While the approach has been demonstrated on a limited basis, the method has been automated in order to better evaluate
J Schein, Steven T. Bushby, Natascha S. Milesi-Ferretti, J House
Building heating, ventilation, air conditioning (HVAC) equipment routinely fails to satisfy performance expectations envisioned at design. Such failures often go unnoticed for extended periods of time. Additionally, higher expectations are being placed on
Richard G. Gann, Jason D. Averill, Erik L. Johnsson, Marc R. Nyden, Richard D. Peacock
This report presents the methodology for and results from a series of room-scale fire tests to produce data on the yields of toxic products in both pre-flashover and post-flashover fires. The combustibles examined were: a sofa made of upholstered cushions
Polymer composites (PC) appear as useful materials for repair and protection of building structures, as well as for manufacturing pre-cast elements. In the case of pre-cast elements as well as repair materials, the usefulness and durability of polymer
Smokeview is a software tool designed to visualize numerical predictions generated by the NIST Fire Dynamics Simulator (FDS), a computational fluid dynamics (CFD) model of fire-driven fluid flow. These two tools are typically used together to respectively
Emil Simiu, R Wilcox, Fahim Sadek, James J. Filliben
The ASCE 7 peak-gust map division of the conterminous United States into two adjacent wind speed zones does not reflect correctly the country's differentiated extreme wind climate. The methodology used to develop the map averages out real climatological
Emil Simiu, R Wilcox, Fahim Sadek, James J. Filliben
The ASCE 7 peak-gust map division of the conterminous United States into two adjacent wind speed zones does not reflect correctly the country's differentiated extreme wind climate. The methodology used to develop the map averages out real climatological
Extensible Markup Language (XML) offers a promising enabling technology for improving the execution of capital projects and capital facility life cycle data management. XML provides the most value when industry practitioners agree to use a common
Xiaohong Gu, Li Piin Sung, D L. Ho, Chris A. Michaels, D Nguyen, Y C. Jean, Tinh Nguyen
The surface and interface of PVDF blended with different amounts of poly (methyl methacrylate) and poly (ethyl acrylate) copolymer (PNMA-co-PEA) have been investigated before and after exposure to UV light. Dry free films having athickness of approximately
The mechanisms by which polymers form carbonaceous chars as a result of thermal and oxidative degradation is an interesting scientific problem, which has important commercial (formation of carbon fibers and nanostructures) and public safety implications
I. A. Mendelssohn, Q. Lin, K. Carney, Nelson P. Bryner, William D. Walton
Oil Spills pose a serious risk to the health of wetland systems. A cleanup technique that is compatible with the wetland environment and is consistent with present wetland management procedures would be highly valued. In-situ burning of oiled wetlands
I. A. Mendelssohn, Q. Lin, K. Carney, Nelson P. Bryner, William D. Walton
In-situ burning of oiled wetlands potentially provides a cleanup technique that is compatible with the wetland environment and is consistent with present wetland management procedures;thus, it would be highly valued. However, effects of burning of wetlands
Walter J. Rossiter Jr, Blaza Toman, M E. McKnight, I Emenanjo, M Baghai Anaraki
Previous studies at NIST on the use of ultrasonic extraction/anodic stripping voltammetry (UE/ASV) for determining lead in household paint found that the particle size of the ground specimen plays an important role in lead extraction efficiency
A series of measurements were made in the Al Mawqa/Al Ahmadi oil field region of Kuwait to explore the feasibility of assessing the heat release rate of individual well fires through flame height and thermal radiation measurements. The heat release rate
Life-cycle cost (LCC) analysis is an economic measurement technique used to determine the total cost of an investment project or activity over its lifetime. This Guide applies the principles of LCC to the special requirements of Environmental Management
William D. Walton, D. D. Evans, Kevin B. McGrattan, Howard R. Baum, W H. Twilley, Daniel M. Madrzykowski, Anthony D. Putorti Jr., Ronald G. Rehm, H Koseki, E J. Tennyson
A series of six mesoscale and one large laboratory fire experiments were performed to measure the burning characteristics of Louisiana crude oil on water in a pan. These included one - 6 m square and five - 15 m square mesoscale burns and one - 1.2 m
I A. Mendelson, Q N. Lin, Nelson P. Bryner, William D. Walton, W H. Twilley, J V. Mullin
In a series of in-situ burns involving 330 plant mesocosms, including Spartina Alterniflora, Spartina Patens, Distichlis spicata, and Sagittaria Lancifolia sods were exposed to burning diesel fuel or crude oil. Oil spilled in sensitive wetlands pose unique
Nelson P. Bryner, William D. Walton, W H. Twilley, G Roadarmel, I. A. Mendelssohn, J. V. Mullin
A series of burns was conducted to evaluate the impact of intentional burning of an oil spill in a marshland environment. Oil spilled in sensitive wetland environments pose unique problems associated with cleanup because mechanical recovery in wetlands may
Nelson P. Bryner, William D. Walton, Laurean A. DeLauter, W H. Twilley, I. A. Mendelssohn, Q. Lin
A series of burns was conducted to evaluate the impact of intentional burning of an oil spill in a marshland environment. Oil spilled in sensitive wetland environments pose unique problems associated with cleanup because mechanical recovery in wetlands may
D. D. Evans, William D. Walton, Howard R. Baum, Kathy A. Notarianni, James R. Lawson, Hai C. Tang, K. R. Keydel, Ronald G. Rehm, Daniel M. Madrzykowski, Richard H. Zile, H Koseki, E J. Tennyson
In 1991 a series of 14 mesoscale fire experiments were performed to measure the burning characteristics of crude oil on salt water. These oil burns in a pan ranged in size from 6 m square to 15 m square. Results of the measurements for burning rate and
A series of measurements were made in the Al Mawqa/Al Ahmadi oil field region of Kuwait to explore the feasibility of assessing the heat release rate of individual well fires through flame height and thermal radiation measurements. The 12 fires measured
A literature survey was conducted to explore the need and appropriate systems for protecting elevator lobbies from smoke migration. The focus is on smoke spread through elevator shafts and lobbies, building occupant and fire fighter use of elevators during