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Fire

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Displaying 2126 - 2150 of 3902

Reactive Molecular Dynamics Model of Thermal Decomposition in Polymers

May 11, 2003
Author(s)
Stanislav I. Stoliarov, Marc R. Nyden, R E. Lyon
The application of quantum chemical and molecular simulation methods can reveal new insights into the thermal degradation chemistries of materials. This work presents and employs an extension of classical force-field-based molecular dynamics to modeling

Database-Assisted Design and Structural Reliability for Building Codes

May 1, 2003
Author(s)
S M. Diniz, Emil Simiu
We present a database-assisted design (DAD)-compatible probabilistic procedure for estimating (a)wind effects for any return period and (b) wind load factors. Unlike earlier reliability estimates, we account for the randomness of peak effects and for

Developments toward an Autonomous Robotic Crane for Automated Steel Construction

May 1, 2003
Author(s)
Kamel S. Saidi, Alan M. Lytle, Nicholas A. Scott
The NIST Construction Metrology and Automation Group, in cooperation with the NIST Intelligent Systems Division, is researching robotic structural steel placement as part of a project to develop an Automated Steel Construction Testbed. This project was

Relating Fresh Concrete Viscosity Measurements From Different Rheometers

May 1, 2003
Author(s)
Chiara F. Ferraris, Nicos Martys
The rheological properties of concrete need to be measured and predicted to enable the characterization of special concrete such as self-consolidating concrete (SCC). It was also shown by a round-robin held in 2000 [ , ] that different rheometers give a

Simulation of Heat Exchangers of a Window Air Conditioner Retrofitted with R-407C

May 1, 2003
Author(s)
S Devotta, A S. Padalkar, N K. Sane, Piotr A. Domanski, N N. Sawant
This paper presents the results of simulation of heat exchangers of an HCFC-22 window air conditioner retrofitted with R-407C. The test conditions considered are as per the Indian Standard IS 1391 (1992) for unitary air conditioners. The simulation has

Structural Collapse Fire Tests: Single Story, Ordinary Construction Warehouse

May 1, 2003
Author(s)
D W. Stroup, Daniel M. Madrzykowski, William D. Walton, W H. Twilley
Two fire tests were conducted in a warehouse located in Phoenix, Arizona to develop data for evaluation of a methodology for predicting structural collapse. A firewall was constructed to divide the warehouse into two fire compartments. Temperatures were

Suppression Limits of Low Strain Rate Non-Premixed Methane Flames

May 1, 2003
Author(s)
Matthew F. Bundy, Anthony P. Hamins, Ki Y. Lee
The suppression of low strain rate non-premixed flames was investigated experimentally in a counterflow configuration for laminar flames with minimal conductive heat losses. This was accomplished by varying the velocity ratio of fuel to oxidizer to adjust

Visualization of Structural Steel Product Models

May 1, 2003
Author(s)
Robert R. Lipman, K A. Reed
A visual interface has been developed to provide a means for users to visualize the steel structure represented by a CIMsteel Integration Standards Release 2 (CIS2) file. Using a web-accessible translator, objects in a user's CIS2 file are mapped to

Performance-Based Fire Protection of Historical Structures

April 6, 2003
Author(s)
Richard W. Bukowski, V Nuzzolese, M Bindo
Performance-based fire protection design methods are particularly appropriate for renovation of historical and culturally significant buildings. This is because they allow the freedom to upgrade fire safety while maintaining sensitivity to the significant

Energy Dissipation Devices for Bridges with Steel Superstructures

April 1, 2003
Author(s)
Michael A. Riley
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

Experimental Testing of Roof to Wall Connections in Wood Frame Houses

April 1, 2003
Author(s)
Michael A. Riley, Fahim H. Sadek
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

Flame Retardant Mechanism of Silica - Effects of Molecular Weight of Resin

April 1, 2003
Author(s)
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

LoopDA-Natural Ventilation Design and Analysis Software

April 1, 2003
Author(s)
William S. Dols, Steven J. Emmerich
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

Smoke Component Yields From Room-Scale Fire Tests (NIST TN 1453)

April 1, 2003
Author(s)
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

Ultrasonic Evaluation Methods Applicable to Polymer Concrete Composites

April 1, 2003
Author(s)
A Garbacz, Edward Garboczi
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
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