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Author: fahim sadek
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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 and Analysis of Single-Plate Shear Connections Under Column Loss
Published: 5/8/2013
Authors: Joseph A Main, Fahim Sadek
Abstract: This paper presents a computational assessment of the behavior of single-plate shear (,shear tabŠ) connections in gravity frames under column loss scenarios. Two-span beam assemblies are considered under pushdown loading of the unsupported center col ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912425

3. Robustness of Steel Gravity Frame Systems with Single-Plate Shear Connections
Series: Technical Note (NIST TN)
Report Number: 1749
Published: 2/27/2013
Authors: Joseph A Main, Fahim Sadek
Abstract: This report presents a computational assessment of the performance of steel gravity framing systems with single-plate shear (,shear tabŠ) connections and composite floor slabs under column loss scenarios. The computational assessment uses a reduced m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911309

4. Modeling of Double-Angle Shear Connections for Evaluation of Structural Robustness
Published: 10/31/2012
Authors: Judy Liu, Joseph A Main, Fahim Sadek
Abstract: Improved structural robustness is expected for steel gravity load-resisting frames with double-angle shear connections as compared to single-plate connections, given the larger deformation capacity of the double angle. Detailed models of bolted doubl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911263

5. Structural Response of World Trade Center Buildings 1, 2 and 7 to Impact and Fire Damage
Published: 10/18/2012
Authors: Therese P McAllister, John L Gross, Fahim Sadek, Steven W Kirkpatrick, Robert S. MacNeill, Mehdi S Zarghamee, Omer O Erbay, Andrew T Sarawit
Abstract: The National Institute of Standards and Technology (NIST) conducted an extensive investigation of the collapse of World Trade Center towers (WTC 1 and WTC 2) and the WTC 7 building. This paper describes the component, subsystem, and global analyses p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912399

6. Overview of the Structural Design of World Trade Center 1, 2, and 7
Published: 9/1/2012
Authors: Therese P McAllister, Fahim Sadek, John L Gross, Jason D Averill, Richard George Gann
Abstract: This paper summarizes the primary structural systems which comprised World Trade Center 1, World Trade Center 2, and World Trade Center 7. The buildings were destroyed in the terrorist attacks of September 11, 2001. This paper describes the four ma ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910105

7. Structural Analysis of Impact Damage to World Trade Center Buildings 1, 2, and 7
Published: 8/12/2012
Authors: Therese P McAllister, Fahim Sadek, John L Gross, Steven W Kirkpatrick, Robert S. MacNeill, R. Bocchieri, Mehdi S Zarghamee, Omer O Erbay, Andrew T Sarawit
Abstract: The National Institute of Standards and Technology (NIST) conducted an extensive investigation of the collapse of World Trade Center towers (WTC 1 and WTC 2) and the WTC 7 building. This paper describes the reconstruction of impact damage to each of ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910120

8. 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

9. 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

10. Letter to the Editor of the CTBUH Journal
Published: 12/1/2011
Authors: Sivaraj Shyam-Sunder, Jason D Averill, Fahim Sadek
Abstract: NIST was invited to comment on the articles written for a special issue of the CTBUH Journal, marking the ten years passed since the 2001 9/11 attacks on the World Trade Center. This letter to the editor reacts to the role of the NIST WTC Investigat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909421



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