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Author: hai lew

Displaying records 21 to 30 of 49 records.
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21. 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

22. Final Report of the National Construction Safety Team on the Collapses of the World Trade Center Towers. Federal Building and Fire Safety Investigations of the World Trade Center Disaster (NIST NCSTAR 1) ***DRAFT for Public Comments***
Series: National Construction Safety Team Act Reports (NIST NCSTAR)
Report Number: 1
Published: 9/1/2005
Authors: Sivaraj Shyam-Sunder, Richard George Gann, William L. Grosshandler, Jason D Averill, Richard W. Bukowski, Stephen A Cauffman, D D Evans, Frank W Gayle, John L Gross, James R. Lawson, Hai Sang Lew, Therese P McAllister, Harold E. Nelson, Fahim Sadek
Abstract: This is the final report on the National Institute of Standards and Technology (NIST) econstruction of the collapses of the World Trade Center (WTC) towers, the results of an investigation conducted under the National Construction Safety Team Act. Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909236

23. 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

24. WTC Towers : Innovative Design Features and Structural Modeling.
Published: 10/10/2004
Authors: Hai Sang Lew, Fahim Sadek
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101194

25. 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

26. 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

27. Global Response Modification Factors vs. Member Ductility-Based Modifiers
Published: 7/1/2002
Authors: S K. Kunnath, Hai Sang Lew, D Friis
Abstract: Most building structures today are designed using the response modification factors (R-factors) given in the code for different types of structural systems. This paper examines whether ductility-based modifiers for structural members (m-factors), re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860445

28. Manual for Seismic and Windstorm Evaluation of Existing Concrete Buildings for Dominican Republic (NIST IR 6867)
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6867
Published: 4/1/2002
Authors: Hai Sang Lew, Emil Simiu, John L Gross
Abstract: This manual is prepared for seismic and winds hazards evaluation of reinforced concrete buildings in the Dominican Republic. The evaluation procedures presented in this manual can be applied to any ordinary cast-in-place concrete buildings, but are ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860413

29. Standards of Seismic Safety for Existing Federally Owned and Leased Buildings
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6762
Published: 1/1/2002
Authors: Stephen A Cauffman, Hai Sang Lew
Abstract: The seismic safety evaluation and mitigation standards, Standards for Seismic Safety for Existing Federally Owned and Leased Buildings, were developed for use by the Federal Government by the Interagency Committee on Seismic Safety in Construction (I ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860394

30. Summary of NIST/GSA Workshop on Application of Seismic Rehabilitation Technologies to Mitigate Blast-Induced Progressive Collapse, September 10, 2001, Oakland, CA
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6831
Published: 12/1/2001
Authors: Nicholas J. Carino, Hai Sang Lew
Abstract: On September 10, 2001 an informal workshop was held in Oakland, California to discuss the applicability of seismic rehabilitation technologies to enhance the resistance of buildings to progressive collapse in the event of loss of primary load-carryin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860389



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