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Author: Joseph Main

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1. Modeling and Analysis of Single-Plate Shear Connections Under Column Loss
Published: 5/8/2013
Authors: Joseph A Main, Fahim H Sadek
Abstract: This paper presents a computational assessment of the behavior of single-plate shear (“shear tab”) 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

2. Robustness of Prototype Steel Frame Buildings against Column Loss: Assessment and Comparisons
Published: 5/2/2013
Authors: Joseph A Main, Judy Liu
Abstract: This paper considers the robustness of prototype 10-story steel moment-frame and braced-frame buildings. Reduced modeling approaches are presented for steel moment-frame and braced-frame buildings with composite floor slabs, and these approaches are ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913183

3. Performance of Steel Shear Tab Connections at Elevated Temperatures
Published: 4/16/2013
Authors: Mina Samir Seif, Joseph A Main, Therese P McAllister
Abstract: At the present time, there is a lack of understanding of the performance of structures as complete systems under extreme loading conditions such as realistic, uncontrolled fires. Current specifications for the design of steel structures in the U.S. d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913531

4. 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 H Sadek
Abstract: This report presents a computational assessment of the performance of steel gravity framing systems with single-plate shear (“shear tab”) 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

5. Modeling of Double-Angle Shear Connections for Evaluation of Structural Robustness
Published: 10/31/2012
Authors: Judy Liu, Joseph A Main, Fahim H 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

6. 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 H 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

7. Performance of Steel Moment Connections under a Column Removal Scenario. II: Analysis
Published: 4/3/2012
Authors: Fahim H 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

8. 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 H 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

9. Modeling of Bolted Connections for Collapse Analysis of Steel Structures
Published: 9/19/2011
Authors: Joseph A Main, Fahim H Sadek
Abstract: In structural collapse scenarios, beam to column connections can be subjected to large rotations as the structure deforms, in addition to large axial forces associated with the development of catenary action. The capability of the connections to sust ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909269

10. Testing and Analysis of Steel and Concrete Beam-Column Assemblies under a Column Removal Scenario
Published: 9/1/2011
Authors: Fahim H 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