时晨1,3,杜永峰1,2.结构-地震动双随机的隔震结构倒塌鲁棒性分析[J].湖南大学学报:自然科学版,2019,(9):11~20
结构-地震动双随机的隔震结构倒塌鲁棒性分析
Robustness Analysis on Progressive Collapse of Isolation StructureBased on Double Randomness of Structure and Seismic Wave
  
DOI:
中文关键词:  双随机  连续倒塌  鲁棒性  可靠度  隔震结构
英文关键词:double randomness  progressive collapse  robustness  reliability  isolated structure
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作者单位
时晨1,3,杜永峰1,2 (1. 兰州理工大学 防震减灾研究所甘肃 兰州 730050 2. 兰州理工大学 西部土木工程防灾减灾教育部工程研究中心甘肃 兰州 730050 3. 甘肃农业大学 水利水电工程学院甘肃 兰州 730070) 
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中文摘要:
      为分析基于结构及地震动双随机的隔震结构竖向连续倒塌鲁棒性,依据二次四阶矩可靠度理论提出随机鲁棒性指标,通过对比分析隔震结构考虑结构随机、地震动随机性以及同时考虑结构-地震动随机性的鲁棒性指标,揭示随机性对隔震结构竖向连续倒塌鲁棒性的影响,以及PGA对隔震结构抗竖向连续倒塌鲁棒性产生的作用.研究结果表明:基于可靠度的随机鲁棒性指标可定量评估隔震结构抗竖向连续倒塌能力;若仅考虑结构随机或地震动随机,均会高估结构抗竖向连续倒塌能力;此外,随PGA增大,结构抗竖向连续倒塌鲁棒性下降,强震作用下,隔震结构极可能发生竖向连续倒塌现象.
英文摘要:
      To analyze the vertical collapse robustness of isolated structures, considering double randomness of structure and seismic wave, a random robustness index was proposed based on the reliability theory. Through analyzing and contrasting the random robustness indexes of different randomness, the influence of randomness on the vertical progressive collapse robustness of isolated structures was revealed. In addition, the influence of PGA on the vertical progressive collapse robustness of isolated structures was studied. And the following results were obtained: The random robustness index can be effectively used for quantitative evaluation of the vertical progressive collapse ability of isolated structures. If only considering random ness of structures or seismic wave, it may overestimate the ability of the structure. The robustness of the isolation structure decreases with the increase of PGA. Under strong seismic, isolation structures are more prone to vertical progressive collapse.
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