项目名称： 基于子结构拟动力试验和子域法的土与高层建筑群动力相互作用机理研究

项目编号： No.51508357

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 建筑科学

项目作者： 葛琪

作者单位： 四川大学

项目金额： 20万元

中文摘要： 地震是一种突发性自然灾害，具有极大的随机性和不确定性。2008年汶川地震和2013年雅安芦山地震给我国带来巨大的损失。土－高层建筑群是一个复杂的整体体系，对体系进行准确的地震反应预测是高层建筑抗震设计的基础。在前期工作中，本申请人已进行了土与高层建筑群的振动台试验，初步讨论土与高层建筑群的动力相互作用规律，高层建筑简化为单自由度体系的带质量块的混凝土单柱模型。为深入研究场地土与高层建筑群动力相互作用对高层建筑抗震性能的影响，本课题拟采用大尺度子结构拟动力试验与子域法相结合研究相互作用机理。根据分区分步计算的思路，提出减少场地土的子域法，将子域法与有限元法相结合，并用子结构拟动力试验验证子域法。在此基础上，运用子域法对土与高层建筑群体系进行参数分析，建立土与高层建筑群相互作用地震反应分析简化评估方法，并揭示土与高层建筑群动力相互作用机理，为高层建筑的设计提供理论依据，促进建筑设计规范的发展。

中文关键词： 子结构拟动力试验；土-高层建筑群；动力相互作用；子域法；机理研究

英文摘要： Earthquake, which is significantly stochastic and uncertain, is a sudden natural disaster. Both the Wenchuan earthquake in 2008 and Lushan earthquake in 2013 brought great loss to our country. Soil - high-rise buildings is a complex system and accurately predicting the seismic response of this system is the foundation for seismic design of High-rise buildings. In previous work, the applicant has already completed the shaking table test of soil - high-rise buildings and has the preliminary results on the dynamic interaction law of soil and high-rise buildings. The high-rise building was simplified to a single concrete column with mass as a single degree of freedom system. In order to understand the effect of dynamic interaction between soil and high-rise buildings on the seismic performance of high-rise buildings, we propose to do a large-scale substructure pseudo dynamic test and put forward the subdomain method with reduced site soil according to the idea of partitions and step by step to investigate the mechanism of soil - high-rise buildings dynamic interaction. The subdomain method is combined with finite element method, which is applied to the large-scale substructure pseudo dynamic test to validate the subdomain method. On this basis, the subdomain method is used in the parameter analysis of soil - high-rise buildings dynamic interaction to build the simplified analysis evaluation method of high-rise building seismic response. Finally, revealing the mechanisms of interaction between soil and high-rise buildings will provide theoretical basis for the design of high-rise buildings and promote the development of building design standards.

英文关键词： substructure pseudo dynamic test;soil - high-rise buildings ;dynamic interaction;subdomain method; mechanism study