大跨度斜拉桥铅芯橡胶支座的参数优化
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摘要
提出了一种采用铅芯橡胶支座进行大跨度斜拉桥减震分析方法;分别建立了大跨度斜拉桥、铅芯橡胶支座的空间有限元分析模型,采用时程分析方法计算了桥梁地震响应;用正交设计法对铅芯橡胶支座进行了参数优化。研究表明:经过优化设计的铅芯橡胶支座能有效的减小斜拉桥在地震下响应。
Reducing vibration by lead-rubber bearings was proposed in long-span cable-stayed bridge.Spatial finite element models of a long-span cable-stayed bridge and LRBs were established respectively.Seismic responses of the bridge were calculated through time-history analysis;parameter optimum of LRBs was carried out by orthogonal design.The results indicated that LRBs with optimization design could effectively reduce seismic response of the cable-stayed bridge.
Reducing vibration by lead-rubber bearings was proposed in long-span cable-stayed bridge.Spatial finite element models of a long-span cable-stayed bridge and LRBs were established respectively.Seismic responses of the bridge were calculated through time-history analysis;parameter optimum of LRBs was carried out by orthogonal design.The results indicated that LRBs with optimization design could effectively reduce seismic response of the cable-stayed bridge.
引文
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[2]吴彬,庄军生.铅芯橡胶支座力学性能及其在桥梁工程中减、隔震应用研究[J].中国铁道科学,2004,25(4):139-141.WUBin,ZHUANG Jun-sheng.Study on mechanical character-istics of lead-rubber bearing and its application for shock reduc-tion/isolation in bridge engineering[J].China Railway Science,2004,25(4):139-141.
[3]李建中,袁万城.斜拉桥减震、耗能体系非线性纵向地震反应分析[J].中国公路学报,1998,11(1):73-78.LI Jian-zhong,YUAN Wan-cheng.Nonlinear longitudinalseismic response analysis of cable-stayed bridge systems with ener-gy dissipation[J].China Journal of Highway and Transport,1998,11(1):73-78.
[4]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[5]金良超.正交设计与多指标分析[M].北京:中国铁道出版社,1988.
[6]徐栋良,樊统江,陈富强,等.模糊正交设计方法在沥青混合料试验中的应用[J].重庆交通大学学报:自然科学版,2007,26(4):63-67.XUDong-liang,FAN Tong-jiang,CHEN Fu-qiang,et al.Application of fuzzy orthogonal method to asphalt mixtureexperi-ment[J].Journal of Chongqing Jiaotong University:Natural Sci-ence,2007,26(4):63-67.
[7]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.
[8]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
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