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

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存在的问题，本文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，为震后救灾保障人民的生命和财产安全提供有力保障。 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。

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

With rapid development of high speed railway construction in Yunnan province, there are more and more bridges with high piers and large span across mountains and rivers. In order to solve the problems in the design of high pier and long span continuous rigid frame bridge in high seismic intensity region, based on the background of Wan La Mu large Bridge with double lines of Li-Xiang railway, selection of bridge schemes, design of main beam and structure of the pier beam joint are introduced in details. In view of the huge seismic forces of piers and stress characteristics of continuous rigid frame bridge, the plastic hinge region of rigid frame bridge is optimized. So the earthquake can be effectively resisted and the purpose of timely detection and repair of damage after the earthquake is achieved, which can provide strong protection for the people''s lives and property security after the earthquake relief. In the end, through the design of high pier and long span continuous rigid frame bridge in high seismic intensity region, some key technologies are summarized, which can improve references for similar bridge design in the future.