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Author: hai lew

Displaying records 11 to 20 of 53 records.
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11. An Experimental and Computational Study of Reinforced Concrete Assemblies under a Column Removal Scenario
Series: Technical Note (NIST TN)
Report Number: 1720
Published: 10/26/2011
Authors: Hai Sang Lew, Yihai Bao, Fahim Sadek, Joseph A Main, Santiago Pujol, Mete Sozen
Abstract: This report presents an experimental and computational study of two reinforced concrete beam-column assemblies, each comprising three columns and two beams. The two beam-column assemblies represent portions of the structural framing system of two ten ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908857

12. Testing and Analysis of Steel and Concrete Beam-Column Assemblies under a Column Removal Scenario
Published: 9/1/2011
Authors: Fahim Sadek, Joseph A Main, Hai Sang Lew, Yihai Bao
Abstract: This paper presents an experimental and computational assessment of the performance of steel and reinforced concrete beam-column assemblies under vertical displacement of a center column, simulating a column removal scenario. The assemblies represent ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907518

13. Experimental and computational assessment of robustness of steel and reinforced concrete framed buildings
Published: 8/1/2011
Authors: Joseph A Main, Yihai Bao, Fahim Sadek, Hai Sang Lew
Abstract: This paper presents an experimental and computational assessment of the performance of full-scale steel and reinforced concrete beam-column assemblies under vertical displacement of a center column, simulating a column removal scenario. The assembli ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907519

14. An Experimental and Computational Study of Steel Moment Connections under a Column Removal Scenario
Series: Technical Note (NIST TN)
Report Number: 1669 rev2
Published: 3/1/2011
Authors: Fahim Sadek, Joseph A Main, Hai Sang Lew, Stephen D Robert, Vincent Chiarito, Sherif El-Tawil
Abstract: This report presents an experimental and computational study of two steel beam-column assemblies, each comprising three columns and two beams. The two beam-column assemblies represent portions of the structural framing system of two ten-story steel f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906046

15. Assessment of Robustness and Disproportionate Collapse Vulnerability of Steel Moment-Frame Buildings
Published: 8/19/2009
Authors: Joseph A Main, Fahim Sadek, Hai Sang Lew
Abstract: Several prototype steel moment-frame buildings have been designed for the purpose of assessing their vulnerability to progressive collapse. The buildings were designed for moderate and high seismic regions. This paper summarizes the development of th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902887

16. Gypsum Stairwell Enclosure Wall System Tests under Uniform Static Pressure
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7615
Published: 7/22/2009
Author: Hai Sang Lew
Abstract: The importance of the structural integrity of the exit stairway enclosures was clearly shown by the collapse of the World Trade Center Towers. The investigation report of the National Institute of Standards and Technology recommended that the design, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903136

17. Testing and Analysis of Steel Beam-Column Assemblies under Column Removal Scenarios
Published: 5/6/2009
Authors: Fahim Sadek, Joseph A Main, Hai Sang Lew, Stephen D Robert, Vincent Chiarito
Abstract: This paper presents an experimental and analytical assessment of the performance of steel beam-column assemblies with two types of moment-resisting connections under vertical displacement of a center column, simulating a column removal scenario. The ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902595

18. Final Report on the Collapse of World Trade Center Building 7. Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1A) ***DRAFT for Public Comments***
Series: National Construction Safety Team Act Reports (NIST NCSTAR)
Report Number: 1
Published: 8/1/2008
Authors: Richard George Gann, William L Grosshandler, Hai Sang Lew, Richard W. Bukowski, Fahim Sadek, Frank W Gayle, John L Gross, Therese P McAllister, Jason D Averill, James R. Lawson, Harold E. Nelson, Stephen A Cauffman
Abstract: This is the final report on the National Institute of Standards and Technology (NIST) investigation of the collapse of World Trade Center Building 7 (WTC 7), conducted under the National Construction Safety Team Act. This report describes how the fir ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909254

19. PERFORMANCE OF SEISMIC MOMENT RESISTING CONNECTIONS UNDER COLUMN REMOVAL SCENARIO
Published: 4/9/2008
Authors: Fahim Sadek, Hai Sang Lew, Joseph A Main, John L Gross
Abstract: Beam-to-column moment connections in steel frame construction have been studied extensively for seismic applications.  However, the behavior of such connections has not been studied under the monotonic loading conditions expected in progressive ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861512

20. Best Practices for Reducing the Potential for Progressive Collapse in Buildings
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7396
Published: 2/1/2007
Authors: Bruce R. Ellingwood, Robert Smilowitz, D O Dusenberry, Dat Duthinh, Hai Sang Lew, Nicholas J. Carino
Abstract: This document is intended to provide owners and practicing engineers with current best practices to reduce the likelihood of progressive collapse of buildings in the event of abnormal loading. The report includes a discussion of an acceptable risk ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860696



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