Effect of Partial Composite Action on Performance of Precast Concrete Sandwich Wall Panels under Blast Load

Abstract:

The present study investigates the response of precast concrete sandwich wall panels under blast load incorporating varying degrees of composite action. The percentage of composite action quantifies a panel’s composite behavior relative to a fully composite assumption, with 0% indicating a fully non-composite panel and 100% indicating a fully composite panel. For this study, the precast panel is modeled as an equivalent single degree of freedom (SDOF) system using the transformation factors. The panel is subjected to a range of blast load while the degree of composite action is varied from 0% to 100%. The response of the panels is evaluated in terms of support rotation, ductility, and support reactions. The effect of degree of composite action on the response of the panel is investigated for a range of blast impulses. The threshold blast impulse value is determined for each partial composite panel considering the moderate level of damage of the panel as per ASCE 59-11 and plastic response of the panel. Further, a range of optimum degree of composite action is identified while trading-off between support rotation and support reaction. The effect of panel span and section moment capacity on the optimum degree of composite action is investigated. It is observed that span length affects the optimum degree of composite action although moment capacity is not influential.

• Periodical: Advances in Science and Technology (Volume 171)
• Pages: 111-116
• DOI: https://doi.org/10.4028/p-dAlh3h
• Online since: December 2025
• Authors: Lekhani Gaur*, Bhavin Zaveri, Jagriti Mandal
• Keywords: Blast Load, Composite Action, Precast Concrete Sandwich Wall Panel, Support Reactions, Support Rotation

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