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Buildings & Construction

Building codes & standards

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Displaying 51 - 75 of 125

Structural Performance of Nuclear Power Plant Concrete Structures Affected by Alkali-Silica Reaction (ASR) - Task 1: Assessing In-Situ Mechanical Properties of ASR-Affected Concrete

February 8, 2021
Author(s)
Fahim H. Sadek, Travis E. Thonstad, Sorin Marcu, Jonathan Weigand, timothy J. barrett, Hai S. Lew, Long Phan, Adam L. Pintar
This report describes the results of Task 1 of a five-task comprehensive research program being conducted at the National Institute of Standards and Technology (NIST) under the sponsorship of the U.S. Nuclear Regulatory Commission (NRC). The overall study

Structural Performance of Nuclear Power Plant Concrete Structures Affected by Alkali-Silica Reaction (ASR) - Task 2: Assessing Bond and Anchorage of Reinforcing Bars in ASR-Affected Concrete

February 3, 2021
Author(s)
Travis E. Thonstad, Jonathan Weigand, Fahim H. Sadek, Sorin Marcu, timothy J. barrett, Hai S. Lew, Long Phan, Adam L. Pintar
This report describes the results of Task 2 of a five-task comprehensive research program being conducted at the National Institute of Standards and Technology (NIST) under the sponsorship of the U.S. Nuclear Regulatory Commission (NRC). The overall study

Aprendiendo de los impactos del huracan Maria en Puerto Rico: Un informe de progreso

January 19, 2021
Author(s)
Joseph Main, Maria K. Dillard, Erica D. Kuligowski, Benjamin Davis, Jazalyn D. Dukes, Kenneth W. Harrison, Jennifer Helgeson, Katherine J. Johnson, Marc L. Levitan, Judith Mitrani-Reiser, Scott J. Weaver, DongHun Yeo, Luis D. Bermudez, Joel Cline, Thomas Kirsch
El 20 de septiembre de 2017, el huracán María tuvo un impacto devastador en gran parte de Puerto Rico, dañando edificios de los que dependían sus comunidades para atención médica, seguridad, comunicaciones, educación, negocios y más. Para comprender mejor

Learning from Hurricane Maria's Impacts on Puerto Rico: A Progress Report

January 19, 2021
Author(s)
Joseph Main, Maria K. Dillard, Erica D. Kuligowski, Benjamin Davis, Jazalyn D. Dukes, Kenneth W. Harrison, Jennifer Helgeson, Katherine J. Johnson, Marc L. Levitan, Judith Mitrani-Reiser, Scott J. Weaver, DongHun Yeo, Luis D. Bermudez, Joel Cline, Thomas Kirsch
On September 20, 2017, Hurricane Maria devastated much of Puerto Rico, damaging buildings that its communities relied upon for medical care, safety, communications, education, business, and more. To better understand failures in buildings and

Application of ASCE 41 to a two-story CFS building

October 22, 2020
Author(s)
Matthew Speicher, Zhidong Zhang, Benjamin W. Schafer
The objective of this paper is to summarize the evaluation results from applying the updated performance-based seismic design provisions: ASCE 41-17, on a cold-formed steel framed building sited in a location with high seismic demands. The assessment

Seismic Evaluation of a 2-Story Cold-Formed Steel Framed Building using ASCE 41-17

September 29, 2020
Author(s)
Matthew S. Speicher, Ivana Olivares, Benjamin W. Schafer
The objective of this report is to assess the adequacy of new provisions in ASCE 41 for seismic assessment of cold-formed steel framed buildings. A two-story cold-formed steel (CFS) framed building that has been designed to contemporary seismic standards

Economic considerations for recovery-based design

September 20, 2020
Author(s)
Juan Fung, Dustin Cook, Yating Zhang, Katherine Johnson, Siamak Sattar
Current building design practice targets life safety performance for the design-level earthquake. While some buildings (e.g., schools, hospitals) may be designed for higher performance, the actual performance of most residential and commercial buildings

Activities and Lessons Learned from ACI Committee 133 - Disaster Reconnaissance

September 13, 2020
Author(s)
Lucas A. Laughery, Aishwarya Y. Puranam, Christopher Segura, Anahid A. Behrouzi
ACI Committee 133 Disaster Reconnaissance was established with the mission of reporting on the effects of major disasters on reinforced concrete (RC) structures. ACI 133 members monitor natural and manmade disasters worldwide to identify events that affect

Loading Protocols and Backbone Curves: U.S. and Japan Perspectives

September 13, 2020
Author(s)
Bruce F. Maison, Kazuhiko Kasai, Matthew Speicher
With the gaining popularity of performance-based engineering, it is essential to have reliable estimates of component (e.g., steel beam or column) performance under actual earthquake loading demands. In the United States, a component backbone curve

Seismic Stability Assessment of Steel Moment Frames and Implications for Design

September 13, 2020
Author(s)
Larry Fahnestock, Shitao Shi, Matthew Speicher
Although it is clear that a building must be capable of carrying gravity loads while developing large inelastic deformations and associated lateral displacements during a large earthquake, achieving this performance objective in day-to-day practice still

Low global-warming-potential refrigerant CH2F2 (R-32): Integration of a radiation heat loss correction method to accurately determine experimental flame speed metrics

August 22, 2020
Author(s)
Gregory T. Linteris, Raik Hesse, Lukas Berger, Michael Hegetschweiler, Heinz Pitsch, Joachim Beeckmann
Due to their high global warming potential (GWP), hydrofluorocarbon refrigerants (HFCs) are systematically being phased out. Replacements with low GWP exist, but give rise to safety hazards as they are found to be mildly flammable. The assessment of the

Measurements and Modeling of Spherical CH2F2-Air Flames

July 27, 2020
Author(s)
Michael J. Hegetschweiler, John L. Pagliaro, Lukas Berger, Raik Hesse, Joachim Beeckmann, Heinz Pitsch, Gregory T. Linteris
The burning velocity of mixtures of the refrigerant R-32 (CH2F2) with air over a range of equivalence ratios are studied via spherically expanding flames SEFs in a large, optically accessible spherical chamber at constant pressure. Shadowgraph images from

Flammable Refrigerant Safety

April 22, 2020
Author(s)
Gregory T. Linteris, Peter Sunderland
Most refrigerants currently in use have relatively high Global Warming Potential (GWP). For example, the GWPs of R-134a and R-410a are 1300 and 2088. Leaks to the atmosphere are common – typically about 10% of the total charge annually. This has motivated

Effects of Stretch and Radiation on the Laminar Burning Velocity of R-32-Air Flames

March 4, 2020
Author(s)
Michael Hegetschweiler, John Pagliaro, Lukas Berger, Raik Hesse, Joachim Beeckmann, Heinz Pitsch, Gregory T. Linteris
Experiments are performed for outwardly propagating spherical flames of R-32/air mixtures at constant pressure. A high-speed video camera captures shadowgraph images from which the flame radius as a function of time is extracted. Direct numerical

Historical Review of the Metered Section Area for Guarded Hot Plates

December 31, 2019
Author(s)
Robert R. Zarr, Stacy M. Bruss, David McElroy
Results of an extensive literature review and investigation of the metered section area for the guarded-hot-plate method, standardized as ASTM C177, Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means

Social and Economic Components of Resilient Multi-Hazard Building Design

October 3, 2019
Author(s)
Katherine Johnson, Juan Fung, Siamak Sattar, Christopher Segura, Therese P. McAllister, Steven McCabe
In 2017, U.S. damages from natural hazard events exceeded $300B, suggesting that current targets for building performance do not sufficiently mitigate loss. The significant costs borne by individuals, insurers, and government do not include impacts from

The Blind Side: Using Canned Loading Protocols in Seismic Testing

June 17, 2019
Author(s)
Matthew S. Speicher, Bruce F. Maison
The seismic behavior of a building component (e.g., shear wall) is a fundamental attribute engineers need to assess the earthquake performance of a building. It is no surprise that component behavior is often dependent on the loading history. Repeatedly
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