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Author: hai lew
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1. A Simple Method to Enhance Catenary Action Development in Beams of RC Frame Structures
Published: 12/1/2013
Authors: Yihai Bao, Hai Sang Lew, Fahim Sadek, Joseph A Main
Abstract: A simple debonding technique is proposed to reduce or eliminate strain localization in reinforcing bars in the region of wide flexural cracks in RC beams, and as a result enhance the resistance of RC buildings to disproportionate collapse. In this st ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914051

2. Modeling of Reinforced Concrete Assemblies under a Column Removal Scenario
Published: 11/8/2012
Authors: Yihai Bao, Hai Sang Lew, Sashi K. Kunnath
Abstract: This paper presents a computational investigation of two reinforced concrete beam-column assemblies, each comprising three columns and two beams, subjected to monotonically increasing vertical displacement of the unsupported center column simulating ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910525

3. Performance of Steel Moment Connections under a Column Removal Scenario. I: Experiments
Published: 4/3/2012
Authors: Hai Sang Lew, Joseph A Main, Stephen D Robert, Fahim Sadek, Vincent Chiarito
Abstract: This paper presents an experimental study of two full-scale steel beam-column assemblies, each comprising three columns and two beams, to (1) define their response characteristics under a column removal scenario, including the capacity of the beams a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909210

4. Performance of Steel Moment Connections under a Column Removal Scenario. II: Analysis
Published: 4/3/2012
Authors: Fahim Sadek, Joseph A Main, Hai Sang Lew, Sherif El-Tawil
Abstract: This paper presents a computational investigation of the response of steel beam-column assemblies with moment connections under monotonic loading conditions simulating a column removal scenario. Two beam-column assemblies are analyzed, which incorpo ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909213

5. 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

6. Modeling and Analysis of Disproportionate Collapse of RC Structures
Published: 10/31/2011
Authors: Yihai Bao, Hai Sang Lew, S K. Kunnath
Abstract: Collapse analyses of a 10-story reinforced concrete frame building are carried out to investigate the robustness of structural systems against column removal scenarios. Computationally efficient reduced models are developed and used in the analyses. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909265

7. 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

8. 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

9. 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

10. 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



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