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李波,饶威,李东升,等. 基于推覆分析的柱尺寸对隔震框架结构抗震性能影响[J]. 科学技术与工程, 2020, 20(10): 4066-4072.
LI Bo,RAO Wei,LI Dong-sheng,et al.Study on Influence of Column Size Based on Pushover Analysis on Seismic Performance of Isolated Frame Structure[J].Science Technology and Engineering,2020,20(10):4066-4072.
基于推覆分析的柱尺寸对隔震框架结构抗震性能影响
Study on Influence of Column Size Based on Pushover Analysis on Seismic Performance of Isolated Frame Structure
投稿时间:2019-07-12  修订日期:2019-11-01
DOI:
中文关键词:  Pushover分析  柱尺寸  隔震结构  抗震性能
英文关键词:Pushover Analysis  Column Size  Isolated Structure  Seismic Performance
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
           
作者单位
李波 长安大学建筑工程学院
饶威 长安大学建筑工程学院
李东升 长安大学建筑工程学院
郑光益 长安大学建筑工程学院
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中文摘要:
      现有隔震结构的研究主要集中于隔震支座,较少考虑上部结构力学特性对整个隔震建筑抗震性能的影响。本文设计了符合规范要求的隔震RC框架结构并依次增大柱尺寸,研究柱尺寸对隔震结构抗震性能的影响。本文利用SAP2000对四个隔震模型分别使用倒三角加载模式和均匀分布加载模式进行Pushover分析,并使用能力谱法评估隔震结构抗震性能。研究结果表明在相同的顶点位移时,隔震结构承受的剪力更小,因而抗震性能比普通结构更优越;通过分析隔震结构塑性铰开展及层间位移变化情况,增大柱尺寸使隔震结构破坏减轻,改善了隔震结构尤其是结构首层的抗震性能;随着柱尺寸越来越大,层间位移减小幅度递减,即抗震性能改善效果减弱。因此,柱尺寸600mm基础上增加10%的方案对隔震结构抗震性能提升最为明显。
英文摘要:
      The research on the existing isolated structure mainly focuses more on the isolation bearing, but less on the influence of the mechanical properties on the seismic performance of the whole isolated building. In this paper, the seismically isolated RC frame structures are designed to the Chinese seismic code and the column size is increased in turn to study its influence on the seismic performance of the isolated structures. In this paper, SAP2000 is adopted to conduct pushover analysis of four isolated structures using inverted triangle loading mode and uniform distributed loading mode, and the capability spectrum method is employed to evaluate the seismic performance of the isolated structures. The analysis results show that the shear demands of the isolated structures are smaller than the corresponding common structures when the same roof displacement is achieved, so their seismic performance is superior to the common structures. By analyzing the plastic hinge development and comparing the inter-story drifts for different models, as the column size is increased, the damage to the isolated structures is reduced, and the seismic performance of the isolated structures, especially at the first story of the structure, is improved accordingly. As the column size is increased substantially, the reduction of the inter-story drift is not significant.. Therefore, an increase of 10% in the column size over 600mm is the most effective measure to improve the seismic performance of the isolated structures.
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