An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The role of the interphase on mechanical performance of glassy polymer/single-walled carbon nanotube composites has been investigated by finite element (FE) method. The matrix and the interphase are modeled using continuum elements and the nanotube is
Recent research into Planetary Boundary Layer (PBL) flows accounts for the difference between �neutral� and �conventionally neutral� flows. Of interest in structural engineering are �conventionally neutral� PBL flows, that is, flows affected by transport
This note establishes a method to analyze wind pressure data on cladding and components of low-rise buildings using the National Institute of Standards and Technology-University of Western Ontario (NIST-UWO) database. The aerodynamic pressures induced on a
Richard D. Peacock, Kevin B. McGrattan, Glenn P. Forney, Paul A. Reneke
CFAST is a two-zone fire model capable of predicting the environment in a multi-compartment structure subjected to a fire. It calculates the time evolving distribution of smoke and fire gases and the temperature throughout a building during a user-
Richard D. Peacock, Paul A. Reneke, Glenn P. Forney
CFAST is a two-zone fire model capable of predicting the environment in a multi-compartment structure subjected to a fire. It calculates the time evolving distribution of smoke and gaseous combustion products as well as the temperature throughout a
Richard D. Peacock, Paul A. Reneke, Glenn P. Forney
This supplement to the CFAST Technical Reference Guide provides details of the software development process for CFAST and accompanying experimental evaluation of the model. It is based in part on the Standard Guide for Evaluating the Predictive Capability
The purpose of this document is to describe the policies and procedures for developing and maintaining CFAST. Such a document is commonly referred to as a {\em Configuration Management Plan}. Description of the theoretical basis of the model, instructions
Michelle A. Helsel, Chiara F. Ferraris, Dale P. Bentz
The accurate measurement of the density of hydraulic cement plays an essential role in the determination of concrete mixture proportions. As more supplementary cementitious materials (SCM), such as fly ash and slag, or cement replacement materials, such as
William S. Dols, Steven J. Emmerich, Brian J. Polidoro
Building energy analysis tools are available in many forms that provide the ability to address a broad spectrum of energy-related issues in various combinations. Often these tools operate in isolation from one another, making it difficult to evaluate the
A Net-Zero Energy Residential Test Facility (NZERTF) has been constructed at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland to demonstrate that a home similar in size, aesthetics, and amenities to those in the
Anthony D. Putorti Jr., Nicholas Melly, Scott Bareham, Joseph E. Praydis
International and domestic operating experience involving High Energy Arc Faults (HEAF) in Nuclear Power Plant (NPP) electrical power systems have demonstrated the potential to cause extensive damage to electrical components and distribution systems along
Large outdoor fires are a problem in Japan and the USA. In order to prevent losing structures to large outdoor fires, it is important to understand the vulnerabilities of structures to firebrand showers and then, strengthen structures to these exposures
Firebrands have been known to be a significant cause of structure ignition in large outdoor fires, such as Wildland-Urban Interface (WUI) fires, large international problem, and urban fires, common in Japan. Sparse data exist with regard to firebrand
A dimensional analysis on firebrand penetration through a mesh screen was carried out to provide a framework to correlate a limited set of experimental data previously reported by Manzello et al. (2011). Two dimensionless variables were obtained. The
Alexander Maranghides, Derek McNamara, Robert Vihnanek, Joseph Restaino, Carrie Leland
The National Institute of Standards and Technology (NIST) has a suite of research projects addressing risk reduction in Wildland Urban Interface (WUI) communities. This case study is focused on the Mountain Shadows Community (MSC) in Colorado Springs
N/A for SFPE Handbook Chapters. Included here is text from the chapter introduction: "With the rapid increase in computer capability and the increase in egress model development, there is a need for guidance on evacuation modeling, specifically the process
Jiann C. Yang, Edward J. Hnetkovsky, Doris L. Rinehart, Marco G. Fernandez
This report documents the beyond-design-basis thermal exposure test results of the performance of metallic and polymeric seals typically used in radioactive material transportation packages. The overall objective of the project is to provide test data and
Structural fire engineering (SFE) is a relatively new interdisciplinary subject, which requires a comprehensive knowledge of heat transfer, fire dynamics and structural analysis. It is predominantly the community of structural engineers who currently carry
The CRPG provides a methodology for local government to bring together all of the relevant stakeholders to establish performance goals to maintain the social and economic fabric when disruptive events occur; in other words, to be resilient. The CRPG is
In residential upholstered furniture, the polyurethane foam (PUF) is the most flammable component. Barrier fabrics (BFs) are often used to protect PUF from heat and flames. For this purpose, the barrier fabrics are placed between the cover fabric and the
Detailed, systematic experiments that demonstrate if certain mulch types may ignite building elements have not been demonstrated. To this end, this paper outlines a series of experiments conducted with various mulch types placed adjacent to realistic-scale
The purpose of this chapter is to set out the principles of chemical kinetics as they apply to combustion in flames and fires. Chemical equilibrium, which was discussed in a previous chapter, deals with the final preferred state of a given set of reactants
Randall J. McDermott, Kevin B. McGrattan, Jason Floyd
A strategy is proposed to guarantee realizability of species mass fractions in explicit time integration of the partial differential equations governing fire dynamics, which is multi-component transport problem. For a mixture of $n$ species, the