振动台子结构试验可解决振动台试验中缩尺比例过小、结构构造措施难以准确模拟、非结构构件动力响应难以研究等问题。基于振动台子结构试验应用于结构韧性防灾中存在的潜在需求,探讨了振动台子结构试验原理及其实现的关键技术问题。研究结果表明:振动台子结构试验以数值仿真与物理试验相结合的方式间接增加振动台试验能力,具有增大物理试验尺寸、减小尺寸效应影响的优点。但是在数值子结构计算效率、试验系统稳定性分析、物理加载精度、数值子结构建模精度和边界条件模型等方面还需要进一步开展系统的研究。
To reduce the influence of large scale on the structural performance,and accurately simulate the connection of assembled structure,relevant structural measures and dynamic response of non-structural components are the key problems to be solved in the development of experimental technology.The shaking-table real-time hybrid simulation provides the possibility to solve the problems existing in the testing and research of structure resilience and disaster prevention.This paper briefly discusses the potential needs of shaking-table real-time hybrid simulation test in structure resilience and disaster prevention,as well as the key technical problems to be solved to achieve the relevant needs.The research results show that the real-time hybrid simulation can indirectly increase the test capacity of the shaking table by combining the numerical simulation and physical test,which has the advantages of increasing the physical test size and reducing the size effect.However,there is still a need for further research on numerical substructure calculation efficiency,stability analysis of test system,physical loading accuracy,numerical substructure modeling accuracy and boundary condition model.
