联塔分幅斜拉桥抗震性能评价  

Aseismic behavior assessment on framing cable-stayed bridge with linked tower

作　　者：梁鑫[1,2] 王冲[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]广西工学院土建系,广西柳州545006

出　　处：《四川建筑科学研究》2011年第3期168-171,共4页Sichuan Building Science

基　　金：广西教育厅科研项目(200808LX348);广西工学院硕士基金(500554)

摘　　要：采用反应谱法对一座四索面联塔分幅斜拉桥进行了抗震性能评价。首先,对比研究了主塔墩底在假定固结和考虑桩土共同工作这两种边界约束处理方式下的动力特性。然后,按照两种超越概率对有桩模型进行了反应谱分析。讨论了两种振型组合方法和三组振型数的情况下结构地震响应的最大值。计算结果表明,桥梁结构的抗震性能满足要求,抗震结构体系采用半飘浮和阻尼器体系是合适的。Four framing cable-stayed bridge with linked tower was used to assess the aseismic behavior.The research method was response spectrum.Considering that two boundary constraints,separately consolidation and pile-soil,work together,the dynamic characteristics of pier bottom from main tower was analyzed.Based on two different exceeding probabilities,pile model was tested by response spectrum method.Then with two vibration models assembled or three assembled,maximum of structural seismic response was computed.The result showed that this bridge construction meets the demand for aseismic behavior.Half floating and damper structural systems are fit for anti-seismic.

关 键 词：斜拉桥 反应谱法 抗震性能 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]