Construction And Application Of Real-Time Dynamic Hybrid Testing System Based On Shaking Tables

Real-time dynamic hybrid testing (RTDHT) is a novel testing method coupled of physical testing and numerical calculation. In this paper, system construction, verification and application of RTDHT are studied based on the dual-shaking-table of Tsinghua University. The study includes:1. A simulation model of the dual-shaking-table named as virtual shaking table is constructed in SIMULINK. A new idea of RTDHT simulation test based on virtual shaking table is developed. The virtual shaking table has the same dynamic properties with the real shaking table, and can be used to do the offline tuning. It also sets up a foundation for the RTDHT simulation test.2. Some key problems in RTDHT system construction are studied and solved. RTDHT and its simulation system are constructed respectively based on virtual and real shaking table. The applicability and accuracy of the system are verified by a two storey rigid frame RTDHT test.3. A lumped parameter model of foundation is introduced into the numerical substructure of the RTDHT system. By coupling the lumped parameter foundation model with the superstructure on the shaking table, the RTDHT is capable of considering soil-structure interaction (SSI) in shaking table tests. High accuracy results are obtained by RTDHT test considering soil-structure interaction effect.4. An ordinary and RTDHT tests of a masonary arch ring are conducted on the dual-shaking-table. First, elastic tests under synchronic excition and collapse tests under nonsychronic excition are performed. Collapse modes and collapse mechanism of the arch ring are studied and disclosed. In the second part, the RTDHT is applied to the masonary arch ring test using two shaking tables for investigation of SSI effect.