地震作用下独塔斜拉桥抗震体系优化
|
摘要
为了确定一致地震作用下独塔斜拉桥的合理抗震约束体系,首先对独塔斜拉桥在纵桥向和横桥向约束体系的传力机理进行了研究,然后以某独塔双索面斜拉桥为工程实例,分别对结构纵横向抗震体系进行了优化分析。分析结果表明,塔梁之间设置纵向弹性索可以在降低桥塔地震弯矩的同时控制主梁位移;墩、梁之间通过设置纵向弹性索,可以根据桥墩抗弯能力调整地震力的分配,起到提高结构整体抗震性能的作用。对于不等跨混合梁独塔斜拉桥,边跨过渡墩采用弹性索限位,可以合理分配横向地震力,从而达到提高结构整体横向抗震性能的目标。
In order to find out the appropriate aseismic constraint system for single tower cable-stayed bridge under consistent earthquake,principles of distributing the inertia forces longitudinally and transversally are analyzed firstly.Then the seismic responses of single tower cable-stayed with different longitudinal constraint systems and lateral constraint systems are calculated by taking a typical bridge as studying object.The results indicate that,seismic responses of tower could be reduced by setting flexible cable between tower and girder longitudinally.The distribution of horizontal seismic force could be optimized by setting flexible cable between pier and girder longitudinally.The distribution of transversal seismic force could be optimized by setting flexible cable between pier and girder transversally,so the earthquake resistance of structure had been improved accordingly.
In order to find out the appropriate aseismic constraint system for single tower cable-stayed bridge under consistent earthquake,principles of distributing the inertia forces longitudinally and transversally are analyzed firstly.Then the seismic responses of single tower cable-stayed with different longitudinal constraint systems and lateral constraint systems are calculated by taking a typical bridge as studying object.The results indicate that,seismic responses of tower could be reduced by setting flexible cable between tower and girder longitudinally.The distribution of horizontal seismic force could be optimized by setting flexible cable between pier and girder longitudinally.The distribution of transversal seismic force could be optimized by setting flexible cable between pier and girder transversally,so the earthquake resistance of structure had been improved accordingly.
引文
[1]项海帆,李瑞森,杨昌众.悬浮体系斜张桥的近似抗震计算[J].结构工程师,1986,(1):64-69.
[2]叶爱君,范立础.超大跨度斜拉桥的横向约束体系[J].中国公路学报,2007,20(2):63-67.
[3]张文学,李建中,李怀峰.低重心斜拉桥地震响应特性研究[J].桥梁建设,2007,(5):21-23.
[4]黄小国,李建中,郭磊.地震作用下独塔斜拉桥合理约束体系[J].结构工程师,2008,(6):29-35.
[5]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.
[6]范立础.桥梁工程[M].北京:人民交通出版社,1997.
[7]金增洪.缆索支撑桥梁[M].北京:人民交通出版社,2002.
[8]陈德伟,范立础,张权.独塔斜拉桥的总体布置和参数研究[J].土木工程学报,1999,32(3):34-39.
[2]叶爱君,范立础.超大跨度斜拉桥的横向约束体系[J].中国公路学报,2007,20(2):63-67.
[3]张文学,李建中,李怀峰.低重心斜拉桥地震响应特性研究[J].桥梁建设,2007,(5):21-23.
[4]黄小国,李建中,郭磊.地震作用下独塔斜拉桥合理约束体系[J].结构工程师,2008,(6):29-35.
[5]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.
[6]范立础.桥梁工程[M].北京:人民交通出版社,1997.
[7]金增洪.缆索支撑桥梁[M].北京:人民交通出版社,2002.
[8]陈德伟,范立础,张权.独塔斜拉桥的总体布置和参数研究[J].土木工程学报,1999,32(3):34-39.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心