摘要
通过有限元分析软件ABAQUS建立了单层柱面铝合金网壳结构的有限元分析模型,利用增量动力分析方法(IDA)对网壳结构进行强震作用下动力响应全过程分析,获得了单层柱面铝合金网壳结构强震失效模式。基于模糊数学理论提出单层柱面铝合金网壳结构强震失效判别方法,结合结构损伤理论拟合网壳结构强震损伤因子,通过大规模参数分析定义适用于铝合金网壳结构的损伤程度分级,对铝合金网壳结构不同损伤状态进行划分。通过随机抽样选取一定数量的结构-地震样本,对铝合金网壳结构开展地震易损性分析,通过回归分析建立地震易损性函数,获得单层柱面铝合金网壳结构的概率地震易损性曲线。结果表明:通过结构地震易损性分析可以看出铝合金网壳结构具有良好的抗震性能,在强震作用下保持基本完好或仅有轻微破坏的概率较大。
The finite element analysis model of single-layer cylindrical aluminum alloy reticulated shell structures was established in ABAQUS. The whole process of dynamic response of the reticulated shell structures under severe earthquake was analyzed by using the incremental dynamic analysis( IDA) method. The failure modes of single-layer cylindrical aluminum alloy reticulated shell structures under severe earthquake were obtained. Based on the fuzzy mathematics theory,the failure criterion of single-layer cylindrical aluminum alloy reticulated shell structures under severe earthquake was proposed. Based on the large-scale parameter analysis,the damage degree classification of aluminum alloy reticulated shell structures was defined and identified. Through random sampling,a certain number of structure-earthquake samples were selected to carry out the seismic vulnerability analysis of aluminum alloy reticulated shell structures. Through regression analysis,the seismic vulnerability function was established to obtain the seismic vulnerability curves of single-layer cylindrical aluminum alloy reticulated shells. The results show that the aluminum alloy reticulated shells has good seismic performance through the seismic vulnerability analysis,and the probability of remaining basically intact or only slightly damaged under severe earthquake is large.
作者
于志伟
郑世杰
甄翠贤
朱宏普
YU Zhiwei;ZHENG Shijie;ZHEN Cuixian;ZHU Hongpu(College of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Guangdong Provincial Engineering Technology Research Center of Complex Steel Structure,Guangzhou 510006,China)
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2020年第S01期17-24,共8页
Journal of Building Structures
基金
国家自然科学基金项目(51778157)
关键词
单层柱面网壳结构
铝合金
强震作用
失效机理
易损性
single-layer cylindrical reticulated shell
aluminum alloy
severe earthquake
failure mechanism
seismic vulnerability
