使用“基于模型的积分算法”的高层结构-消能减震器体系子结构振动台试验研究

The energy dissipation technology has been widely applied to high rise buildings so as to improve their seismic safety. Substructure shake table testing (SSTT) is one of the most reliable methods of evaluating the structures with energy dissipation devices, but the real-time numerical simulation of high rise structures is an important bottleneck restricting its application. This project studies the SSTT for the high rise structure-energy dissipation device systems using the new type model-based integration algorithms. Studies on the stability and accuracy of the SSTT system will be conducted. The theoretical analysis, numerical simulation and experimental study are adopted in this study. The influences of integration algorithms on the stability and accuracy of the SSTT system are investigated to develop the integration algorithms with high stability and computing efficiency. Taking the coupled computational delay and shake table delay as well as the corresponding delay compensation into consideration, the influences of the coupling effects of integration algorithms and dynamic characteristics of shake table on the stability and accuracy of the SSTT system are studied to build a SSTT system with high stability and accuracy. The influences of the ground motions, parameters of energy dissipation devices, and soil-structure interaction on the efficiency of the energy dissipation devices will be obtained by conducting a series of SSTTs. The implementation of this project has great theoretical significance and practical value on the seismic performance evaluation of the high rise structure-energy dissipation device systems and the application of SSTT on actual engineering practice.

为提高地震安全性，高层建筑已广泛采用消能减震技术。子结构振动台试验是消能减震结构可靠的评估手段，但高层结构的实时数值模拟是制约该技术应用的重要瓶颈。本项目以子结构振动台试验为研究对象，以高层结构-消能减震器体系为研究载体，以新型“基于模型的积分算法”为研究特色，围绕子结构振动台试验系统的稳定性和精度开展研究。采用理论分析、数值模拟和试验研究相结合的方法，研究积分算法对子结构振动台试验稳定性与精度的影响，开发稳定且高效的积分算法；考虑耦合的计算时滞与振动台时滞及相应的时滞补偿，研究积分算法与振动台动力特性耦合对子结构振动台试验稳定性与精度的影响，建立稳定且准确的试验系统；基于子结构振动台试验，揭示地震动输入、消能减震器参数、土-结构相互作用对消能减震器工作效率的影响。本项目对于实现高层结构-消能减震器体系抗震性能的准确评估，推动子结构振动台试验在实际工程的应用均具有重要的理论意义和实用价值。