罕遇地震下渡槽槽架结构弹塑性侧移的可靠度分析
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摘要
基于变形破坏准则和规范推荐的弹塑性层间位移的简化计算方法,以层间位移为控制指标,提出了渡槽结构"大震不倒"的可靠度分析模型;基于现行相关规范的规定,提出了渡槽槽架结构层间位移的控制限值;根据各随机变量的统计特征,采用Monte-Carlo模拟与有限元相结合的方法对渡槽槽架结构弹塑性位移控制的可靠度进行了研究,结合实例,分析了层间位移可靠指标与层屈服强度系数ξy之间的关系,并为渡槽结构在地震作用下的可靠度分析和设计提供了一种新方法.
Based on the criterion of deformation and failure and the simplified method for elastoplastic inter-storey displacement recommended in specification,inter-storey displacements were treated as controlling indices,the reliability analysis model in terms of no collapse under infrequent earthquake was built up.According to the basic specifications in present relevant criterion,the limit value of inter-storey displacement was put forward.According to the statistical characteristics of stochastic variables,the reliabilities controlled by displacement of aqueduct structure under infrequent earthquake have been studied using the method combined Monte-Carlo simulation with finite element.The relationship between the reliabilities of inter-storey displacement and the factor of inter-storey yield strengthξywere analyzed combined with a practical case.A new reliability method and design of aqueduct structure under earthquake action is brought out.
Based on the criterion of deformation and failure and the simplified method for elastoplastic inter-storey displacement recommended in specification,inter-storey displacements were treated as controlling indices,the reliability analysis model in terms of no collapse under infrequent earthquake was built up.According to the basic specifications in present relevant criterion,the limit value of inter-storey displacement was put forward.According to the statistical characteristics of stochastic variables,the reliabilities controlled by displacement of aqueduct structure under infrequent earthquake have been studied using the method combined Monte-Carlo simulation with finite element.The relationship between the reliabilities of inter-storey displacement and the factor of inter-storey yield strengthξywere analyzed combined with a practical case.A new reliability method and design of aqueduct structure under earthquake action is brought out.
引文
[1]建筑抗震设计规范GB50011-2001[S].北京:建筑工业出版社,2001.
[2]钟益村,高小旺,汪颖富.建筑抗震设计规范(GBJ11-89)应用与设计实例[M].北京:中国铁道出版社,1993.
[3]Chandlera A M,Lam N T K.Performance based de-sign in earthquake engineering:a multidisciplinary re-view[J].Engineering Structures,2001,23(12):1525-1543.
[4]龚思礼.建筑抗震设计[M].北京:中国建筑工业出版社,1994.
[5]高小旺,鲍霭斌.用概率方法确定抗震设防标准[J].建筑结构学报,1986,7(2):57-65.
[6]高小旺,鲍霭斌.地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):15-24.
[7]黄振兴,程学文,侯建国.水工钢筋混凝土结构可靠度分析和分项系数确定[C]//水利水电工程结构可靠度设计统一标准专题文集.成都:四川科学技术出版社,1994:34-62.
[8]张学易.水工混凝土的强度特性[C]//水利水电工程结构可靠度设计统一标准专题文集.成都:四川科学技术出版社,1994:63-67.
[2]钟益村,高小旺,汪颖富.建筑抗震设计规范(GBJ11-89)应用与设计实例[M].北京:中国铁道出版社,1993.
[3]Chandlera A M,Lam N T K.Performance based de-sign in earthquake engineering:a multidisciplinary re-view[J].Engineering Structures,2001,23(12):1525-1543.
[4]龚思礼.建筑抗震设计[M].北京:中国建筑工业出版社,1994.
[5]高小旺,鲍霭斌.用概率方法确定抗震设防标准[J].建筑结构学报,1986,7(2):57-65.
[6]高小旺,鲍霭斌.地震作用的概率模型及其统计参数[J].地震工程与工程振动,1985,5(1):15-24.
[7]黄振兴,程学文,侯建国.水工钢筋混凝土结构可靠度分析和分项系数确定[C]//水利水电工程结构可靠度设计统一标准专题文集.成都:四川科学技术出版社,1994:34-62.
[8]张学易.水工混凝土的强度特性[C]//水利水电工程结构可靠度设计统一标准专题文集.成都:四川科学技术出版社,1994:63-67.
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