Fragility of Steel Frame Buildings under Blast Load
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
Effects of different structural configurations, member orientations and standoff distances on blast-induced failure of steel frame buildings are investigated through development of fragility curves. Three steel frame buildings with different geometric configurations—square plan with rectangular shape in elevation, square plan with pyramidal shape in elevation, and semicircular plan with equal area at each floor level—are analyzed under blast load. The steel frame buildings are modeled, analyzed, and designed for dead load (DL), live load (LL) and seismic load (SL) for the National Capital Region (NCR), India. Force-controlled static nonlinear pushover analyses are performed to develop the fragility curves for the buildings under blast load. Different orientations of the columns (I-section) are considered to investigate the effect on building fragility under blast load. The results indicate significant effects of the structural configurations and column orientations on the blast resistance of the building. The pyramidal structure is found to be the most effective configuration in reducing the blast load effect on the structure among the considered configurations. It is also observed that the corner of a building is less critical in terms of blast load mitigation.
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Acknowledgments
The authors thankfully acknowledge the constructive comments by the anonymous reviewers to improve overall quality of the paper. The first author would like to convey his sincere appreciation to Mr. Carles Colomer and Mr. Jonas Korndörfer for their brilliant technical suggestions at different stages of the research work carried out in RWTH Aachen Univ., Germany. The financial assistance provided by the German Academic Exchange Service (DAAD) to the first author through “IIT Master Sandwich Scholarships” is also gratefully acknowledged.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 31 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Apr 26, 2016
Accepted: Nov 22, 2016
Published ahead of print: Feb 14, 2017
Published online: Feb 15, 2017
Discussion open until: Jul 15, 2017
Published in print: Aug 1, 2017
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