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- Conference Paper
In current engineering practice, the understanding of structural behavior in fire largely relies on data from standard fire tests of single structural components. In order to move to modern performance-based standards, as have been established in the seismic domain, experimental qualification of structures in fire must account for interactions between elements within the overall structural assembly. This situation has motivated researchers to extend the hybrid simulation method, which has been deeply investigated in the seismic domain, to structures-in-fire testing. By linking numerical and physical substructures, hybrid simulation offers a flexible, cost-effective approach. However, the implementation of thermomechanical hybrid simulation (TMHS) tests must be carefully designed to properly account for rate-dependent creep effects that become significant in high temperature tests. While purely mechanical hybrid simulations are commonly performed psuedodynamically at extended time scales, this practice must be minimized when rate-dependency is involved. When realtime testing, which is the ideal scenario, is not possible due to constraints of the laboratory equipment, the testing time scale must be accurately tuned to minimize experimental approximation. The optimal selection of the time integration scale and the numerical integration scheme in TMHS are presented herein. Furthermore, the thermalTruss experimental element implemented in the OpenFresco hybrid simulation middleware is presented, which provides the ability to fully simulate a TMHS test prior to experimentally substructuring the physical specimen in the laboratory Show more
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Subjecthybrid simulation; thermomechanical; time integration
Organisational unit03930 - Stojadinovic, Bozidar
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