高烈度地震区高墩大跨连续刚构桥的设计关键技术及创新  

Key Technology and Innovation in Design of High Pier Long-span Continuous Rigid Frame Bridge in High Seismic Intensity Region

作　　者：李聪林[1] 户东阳[1] 李冲杰[1] 卢三平[1] LI Cong-lin;HU Dong-yang;LI Chong-jie;LU San-ping(Kunming Survey&Design Research Institute of CREEC,Kunming 650200,China)

机构地区：[1]中铁二院昆明勘察设计研究院有限责任公司,昆明650200

出　　处：《科学技术与工程》2020年第34期14251-14256,共6页Science Technology and Engineering

基　　金：四川省重点研发计划(2019YFG0048);中国中铁二院科研项目(KYY2018059(18-20))。

摘　　要：随着云南高速铁路建设的快速发展,跨越高山大河的高墩大跨桥梁逐渐增多,为解决高烈度地震区高墩大跨连续刚构桥设计中存在的问题,以丽香铁路万拉木双线大桥为背景,详细介绍了桥梁方案的选择、主梁的设计和墩梁结合部构造。针对桥墩受到的巨大地震力,结合连续刚构桥的受力特点,对刚构墩的塑性铰区域进行了优化设计,不但可以有效抵抗地震作用,而且能够达到震后及时发现和修复损伤的目的。最后,通过高烈度地震区高墩大跨连续刚构桥的设计,总结了一些关键技术,为以后类似桥梁的设计提供参考。With rapid development of high-speed railway construction in Yunnan Province,more and more bridges with high piers and large span across mountains and rivers are encountered.Taking the Wanlamu Bridge of Li-Xiang Railway as a case,selection of bridge schemes,design of the main beam and pier beam joint were studied in detail.To prevent the huge seismic forces to the piers and understand the stress-strain characteristics of the continuous rigid frame bridge,the plastic hinge region of the rigid frame bridge was optimized,by which possible earthquake induced damage could be effectively minimized.Meanwhile,with the design,damage after earthquake could be timely detected and repaired.At last,key technologies in the design of high pier and long span continuous rigid frame bridge in high seismic intensity region were summarized,which provides references for similar bridge design in the future.

关 键 词：高烈度 高墩 大跨 连续刚构 预应力 

分 类 号：U443[建筑科学—桥梁与隧道工程]