基于IDA的新疆砌体结构房屋易损性研究
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摘要
在数值模型可靠度得到验证的基础上,将增量动力弹塑性时程分析应用到砌体结构易损性分析中,建立了新疆典型砌体在不同破坏状态下的易损性曲线.对砌体结构的极限状态点定义进行了改进.研究结果表明,砌体结构脆性大,抵抗倒塌能力弱,当砌体结构为严重破坏时,非常容易倒塌.在构造措施满足规范要求的前提下,提高房屋结构的横墙面积比可以增强砌体结构的抗震能力.
Based on the verification of the reliability of numerical simulation model,the incremental dynamic analysis of elastic-plastic time-history was applied to the fragility analysis of masonry structures,and the seismic fragility curves of the masonry structure in corresponding to different damage states in Xinjiang were established. The ultimate state of masonry structure definition was improved.The results show that masonry structure is very fragile,and vulnerable to collapse. When severe damage incurs to the masonry structure,it is prone to collapse. When the structure measures meet the specifications,improving the cross-wall area ratio can enhance the seismic capacity of masonry structures.
Based on the verification of the reliability of numerical simulation model,the incremental dynamic analysis of elastic-plastic time-history was applied to the fragility analysis of masonry structures,and the seismic fragility curves of the masonry structure in corresponding to different damage states in Xinjiang were established. The ultimate state of masonry structure definition was improved.The results show that masonry structure is very fragile,and vulnerable to collapse. When severe damage incurs to the masonry structure,it is prone to collapse. When the structure measures meet the specifications,improving the cross-wall area ratio can enhance the seismic capacity of masonry structures.
引文
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[6]VAMVATSIKOS D,CORNELL C A.Incremental dynamic analysis[J].Earthquake Engineering&Structural Dynamics,2002,31(3):491-510.
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[2]万世臻.新疆伽师地区农村民居震害及重建措施[J].工程抗震,1999(4):40-42.
[3]汪梦甫,曹秀娟,孙文林.增量动力分析方法的改进及其在高层混合结构地震危害性评估中的应用[J].工程抗震与加固改造,2010,32(1):104-109.
[4]熊立红.多层混凝土砌块结构性态抗震研究[D].哈尔滨:中国地震局工程力学研究所,2004.
[5]VAMVATSIKOS D.Seismic performance,capacity and reliability of structures as seen through incremental dynamic analysis[D].Palo Alto:Stanford University,2002.
[6]VAMVATSIKOS D,CORNELL C A.Incremental dynamic analysis[J].Earthquake Engineering&Structural Dynamics,2002,31(3):491-510.
[7]SCHNEIDER P J,SCHAUER B A.HAZUS—its development and its future[J].Natural Hazards Review,2006,7(2):40-44.
[8]陆祝贤,吴轶,杨春,等.基于IDA的阀厅结构地震易损性分析[C]//王俊.第六届全国防震减灾工程学术研讨会论文集(Ⅰ).北京:《土木工程学报》杂志社,2012.
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