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Yihai Bao, Joseph A. Main, Hai S. Lew, Fahim Sadek
A computational assessment of the robustness of reinforced concrete (RC) building structures under column loss scenarios is presented. A reduced-order modeling approach is presented for three-dimensional RC framing systems, including the floor slab, and
The wildlandurban interface (WUI) is defined in terms of housing density and proximity to wildlands, yet its relevance seems to be only in conjunction with wildland fire threats. The objective of this paper is to (1) identify the WUI areas threatened from
In 1998, NIST published a review of commercial and institutional building airtightness data that found significant levels of air leakage and debunked the myth of the airtight commercial building (Persily 1998). Since then, NIST has expanded and maintained
As strategies for improving building envelope and HVAC equipment efficiencies are increasingly required to reduce building energy use, a greater percentage of energy loss will occur through building envelope leakage. Although the energy impacts of
Erica D. Kuligowski, Franklin T. Lombardo, Long Phan, Marc L. Levitan, David P. Jorgensen
This is the final report of the National Institute of Standards and Technology (NIST) investigation of the May 22, 2011 tornado in Joplin, Missouri, conducted under the National Construction Safety Team Act. This report describes the wind field of the
Mina S. Seif, Therese P. McAllister, Joseph A. Main, William E. Luecke
Performance-based methodologies to evaluate the fire performance of structures are needed to move beyond the prescriptive procedures presently in use, which cannot be used to determine actual structural performance in fire. Analytical methods are needed
The study of compressed hydrogen releases from high-pressure storage systems has practical application for hydrogen and fuel cell technologies. Such releases may occur either due to accidental damage to a storage tank, connecting piping, or due to failure
The largest source of carbon dioxide emissions is fossil fuel combustion. Since 1990, more than 90% of carbon dioxide emissions within the United States have come from fossil fuel combustion. Stationary sources such as power plants and industrial
The purpose of this report is to provide guidance to system designers, building managers and/or building emergency personnel responsible for emergency communication on how to create and disseminate messages using basic communication modes (audible and/or
The performance of a residential split heat pump in the cooling mode operating under nine faults was described using normalized performance parameters determined from a ratio of the faulty value to the no-fault value obtained from heat pump tests in
Erica D. Kuligowski, Richard Peacock, Bryan Hoskins, Emily Wiess
The time that it takes a population to reach safety when descending a stairwell during building evacuations is typically described by measureable engineering variables. These engineering variables include stairwell geometry, speed, density, and pre
Kathryn M. Butler, Alexander H. Cheng, Christopher Mullen, Ahmed Al-Ostaz
Applying a polymeric coating on steel members has been demonstrated to be an effective countermeasure for the threat of blast on building and other structures. The development of a blast-resistant coating for steel with good characteristics in a fire would
Wireless sensor networks (WSNs) have enabled numerous embedded wireless applications in different areas such as military/battlefield, environmental monitoring, and intelligent building systems. They consist of a large number of nodes that need to operate
Dustin G. Poppendieck, Dong H. Rim, Andrew K. Persily
In-duct electrostatic air filters (ESP) have been shown to be an effective particulate control device for reducing UFP concentrations (20 nm - 100 nm) in buildings, although they have the potential to increase indoor ozone concentrations due to corona
Kevin Y. Teichman, Steven J. Emmerich, Andrew K. Persily
In this paper, we describe and demonstrate a graphical approach to illustrating the performance of high-performing buildings. Our approach enables building designers, owners, operators, and occupants to evaluate the performance of a building as designed
Enrico Ronchi, Paul A. Reneke, Erica D. Kuligowski, Richard D. Peacock
This paper provides the analysis of a data-set about people movement on stair landings collected during an evacuation drill performed in a six-storey office building in the United States. The evacuation drill was filmed and occupants behaviours on stair
The complex relationships between indoor and outdoor environmental conditions, coupled with the impacts of climate change, make it more important than ever before that buildings be comfortable and healthy for the occupants yet also energy efficient. This
When a building emergency occurs, it is not always sufficient to simply initiate alarm bells. Individuals may not know what the alarm bell means and as a result may respond inappropriately to its sound. Many buildings have installed mass notification or
Besides providing thermal comfort and acceptable indoor environmental quality (IEQ), the designers of buildings and other enclosed spaces are increasingly challenged to provide a healthy environment in an energy efficient manner. Increasing pressure to
Lisa C. Ng, Andrew K. Persily, Steven J. Emmerich, Kevin Y. Teichman
Heating, ventilating, and air conditioning (HVAC) systems in buildings are designed to provide thermally comfortable conditions and to maintain acceptable indoor air quality (IAQ). At the same time, the operating costs of HVAC systems are often a large
This paper presents a computational assessment of the performance of steel gravity framing systems with single-plate shear connections and composite floor slabs under column loss scenarios. The computational assessment uses a reduced modeling approach
Thermal conductivity measurements at and near room temperature are presented as the basis for certified values of thermal conductivity for SRM 1450d, Fibrous Glass Board. The measurements have been conducted in accordance with a randomized full factorial
Piotr A. Domanski, J S. Brown, Jae H. Heo, Mark O. McLinden
This presentation discusses the thermodynamic performance limits of the vapor compression cycle. We have applied evolutionary algorithms to explore the performance of hypothetical refrigerants defined by the thermodynamic parameters used by the extended