基于双向最大加速度反应谱的双向水平地面运动记录选择和标定方法

发布时间：2018-07-01 09:48

  本文选题：地面运动记录 + 双向　； 参考：《建筑结构学报》2017年01期

【摘要】：在用动力时程分析法预测高层建筑和复杂建筑的地震反应时,需要输入包含两个水平分量的双向地面运动记录。通过整理现有双向地面运动记录选择和标定方法可知,我国规范GB 50011—2010《建筑抗震设计规范》在这方面存在不足之处。在双向最大加速度反应谱的基础上,提出双向水平地面运动记录选择和标定方法。为揭示该方法与我国规范方法所预测的结构地震反应的差异,并考察根据我国规范方法预测出的结构地震反应评价抗震性能的安全性,在一个工程算例的罕遇地震非线性动力反应分析中,分别用这两种方法选择双向地面运动记录。分析结果表明:基于双向最大加速度反应谱的双向地面运动记录选择和标定方法较我国规范方法预测的结构地震反应更大,对于力和位移的预测结果,前者比后者分别增大约7%和15%。针对地震风险起控制作用的地面运动类型不同,我国规范方法预测出的结构地震反应相对于基于双向地面运动记录选择和标定方法预测出的结构地震反应的危险程度高低亦不同,以统一的性能指标来控制结构的抗震性能,最终实现的各结构抗震安全性有所不同。因此,建议在动力时程分析中采用基于双向最大加速度反应谱的双向地面运动记录选择和标定方法。
[Abstract]:In order to predict the seismic response of tall buildings and complex buildings by using dynamic time-history analysis method, the bi-directional ground motion records containing two horizontal components should be input. Through sorting out the existing bidirectional ground motion records selection and calibration methods, it can be seen that the code GB50011-2010 "Code for aseismic Design of buildings" has some shortcomings in this respect. Based on the bidirectional maximum acceleration response spectrum, a method for selecting and calibrating the bidirectional horizontal ground motion records is proposed. In order to reveal the difference between this method and the structural seismic response predicted by the code method in China, the safety of the seismic response evaluation of the structure predicted by the code method in China is investigated. In the nonlinear dynamic response analysis of a rare earthquake in an engineering example, the two methods are used to select the bidirectional ground motion records. The results show that the bidirectional ground motion record selection and calibration method based on the bidirectional maximum acceleration response spectrum is larger than the structural seismic response predicted by the code method in China, and the prediction results for the force and displacement are obtained. The former increases about 7% and 15% than the latter, respectively. In view of the different types of ground motion that play a controlling role in earthquake risk, The earthquake response predicted by the code method in our country is different from that predicted by the bidirectional ground motion record selection and calibration method, and the seismic response of the structure is controlled by unified performance index. The ultimate seismic safety of each structure is different. Therefore, a bidirectional ground motion record selection and calibration method based on bidirectional maximum acceleration response spectrum is proposed in dynamic time history analysis.
【作者单位】： 重庆大学土木工程学院;中国建筑科学研究院;
【基金】：国家自然科学基金青年基金项目(51408575)
【分类号】：TU973.31
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本文编号：2087377