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Author: hai lew
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Displaying records 11 to 20 of 52 records.
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11. Assessment of Structural Systems Evaluation Methods Based on Local Seismic Demands
Published: 12/1/2002
Authors: Hai Sang Lew, S K. Kunnath
Abstract: This paper examines the effectiveness of nonlinear static procedures for seismic response analysis of buildings. Nonlinear static procedures are recommended in FEMA 273 (Guidelines for Seismic Rehabilitation of Buildings) for assessing the seismic p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860461

12. Baseline Structural Performance and Aircraft Impact Damage Analysis.
Published: 10/19/2004
Authors: Fahim Sadek, Emil Simiu, M A Riley, William P. Fritz, Hai Sang Lew
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101231

13. 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

14. Computational Model for Nonlinear Behavior of R/C Beam-Column Assemblies and Full-Scale Experimental Validation under a Column Removal Scenario
Published: 10/31/2011
Authors: Yihai Bao, Hai Sang Lew
Abstract: A number of computational tools have been developed in recent years to simulate the disproportionate (progressive) collapse behavior of multi-story reinforced concrete buildings. Under disproportionate collapse scenarios, beam-column connections of m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909260

15. Design and Construction of Structural Systems (Appendixes A-B) Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-1A)
Series: National Construction Safety Team Act Reports (NIST NCSTAR)
Report Number: 1-1
Published: 12/1/2005
Authors: Hai Sang Lew, Richard W. Bukowski, Nicholas J. Carino
Abstract: The collapse of World Trade Center (WTC) 1, 2, and 7 resulted from structural damage from direct and indirect effects of aircraft impact and the ensuing fires. Thus, for collapse analyses of these buildings, knowledge of the physical state of the str ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909013

16. Design, Construction and Maintenance of Structural and Life Safety Systems. Federal Building and Fire Safety Investigation of the World Trade Center (NIST NCSTAR 1-1) ***DRAFT for Public Comments***
Series: National Construction Safety Team Act Reports (NIST NCSTAR)
Report Number: 1-1
Published: 9/1/2005
Authors: Hai Sang Lew, Richard W. Bukowski, Nicholas J. Carino
Abstract: The collapse of World Irade Center (WTC) 1, 2, and 7 resulted from structural damage from direct and indirect effects of aircraft impact and the ensuing fires. Thus, for collapse analyses of these buildings, knowledge of the physical state of the str ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908998

17. Design, Construction, and Maintenance of Structural and Life Safety Systems. Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-1)
Series: National Construction Safety Team Act Reports (NIST NCSTAR)
Report Number: 1-1
Published: 12/1/2005
Authors: Hai Sang Lew, Richard W. Bukowski, Nicholas J. Carino
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101332

18. Distribution of Earthquake Input Energy in Structures
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6903
Published: 1/1/2003
Authors: P Khashaee, B Mohraz, Fahim Sadek, Hai Sang Lew, John L Gross
Abstract: In developing an energy-based design approach and assessing the damage potential of structures, one must know the distribution of earthquake input energy among energy components: kinetic, elastic strain, hysteretic, and damping. This report examines ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860444

19. Energy-Based Design Approach for Seismic Design: Energy Spectra
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6599
Published: Date unknown
Authors: P Khashaee, B Mohraz, Fahim Sadek, Hai Sang Lew, John L Gross
Abstract: Among the approaches that the Structural Engineers Association of California has recommended for performance based seismic design is the energy approach. In this approach, the earthquake input energy transmitted to the structure is estimated from gr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860314

20. Evaluation of Seismic Performance Parameters
Published: 6/1/1997
Author: Hai Sang Lew
Abstract: Recent earthquakes have shown that buildings designed for life safety could sustain severe damage to structural and nonstructural elements and building contents. In the U.S. several groups have proposed performance-based seismic design approaches to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860119



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