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Author: Fahim Sadek

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1. Robustness Assessment of RC Frame Buildings under Column Loss Scenarios
Published: 4/3/2014
Authors: Yihai Bao, Joseph A Main, Hai Sang Lew, Fahim Sadek
Abstract: A computational assessment of the robustness of reinforced concrete (RC) building structures under column loss scenarios is presented. A reduced-order modeling approach is presented for three-dimensional RC framing systems, including the floor slab, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915189

2. Robustness of Precast Concrete Frames: Experimental and Computational Studies
Published: 4/3/2014
Authors: Joseph A Main, Yihai Bao, Hai Sang Lew, Fahim Sadek
Abstract: This paper describes both full-scale testing and detailed finite-element modeling of a precast concrete moment-frame assembly extracted from the perimeter moment frame of a 10-story prototype building. The assembly comprises two beam spans and three ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915219

3. 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

4. Structural Design for Disaster Resilience
Published: 10/28/2013
Authors: Fahim Sadek, Joseph A Main, John L Gross, Therese P McAllister
Abstract: This paper presents a brief overview of research at the National Institute of Standards and Technology (NIST) on disaster resilience of buildings, infrastructure, and communities, including component programs and projects. NIST‰s efforts aim at deve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914256

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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



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