Abstract
Civil engineering structures can be subjected to localized failures, which can lead to progressive collapse (PC) scenarios involving and dynamic response with damage propagation. Most design methods are based on static calculations where dynamic effects are accounted for using dynamic increase factors, which are still delicate to justify for all PC configurations. In the present paper, to account for dynamic effects, the pseudo-dynamic (PsD) method is adapted to PC. The PsD method combines quasi-static experimental testing with the framework of finite element analysis to solve the equation of motion through time. The restoring forces of a physical structure are experimentally measured, while the inertial and viscous forces’ contributions are numerically computed. The objective is to validate PsD testing in the context of PC analysis. A beam fixed at both extremities is tested through the sudden removal of a supporting column at its mid-span. Experimental PsD tests are compared to a specifically developed finite element model. The latter describes both geometric and material nonlinearities to capture the potential development of tensile catenary action and plastic hinges. During a PC event, the proposed technique is able to well describe the dynamic structural response and phenomena, such as Tensile Catenary Action.
Published Version
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