厦漳跨海大桥北汊主桥抗震性能研究

摘要

厦漳跨海大桥北汊主桥是主跨780 m的连续钢箱梁双塔斜拉桥,场地地震基本烈度高达Ⅶ度,其抗震设计非常复杂,且无规范可循,为此开展专门研究.以JTG/T B02-01-2008《公路桥梁抗震设计细则》为指导,从抗震设防标准、地震动输入、动力有限元建模、抗震性能评价、抗震构造措施检查等方面,对厦漳跨海大桥北汊主桥抗震性能研究进行介绍,为类似桥梁抗震设计提供参考.%Main bridge in northern bay of Xiamen-Zhangzhou Crossing Sea Bridge is a continuous steel box girder twin-tower cable-stayed bridge with 780m main span, the basic seismic intensity is up to VII degree, so anti-seismic design is very complicated and no specifications are followed. For this reason special research must be developed. This paper under guidance of JTG/T B02-01-2008 "Detailed Rules for Anti-seismic Design of Highway Bridges" introduces research on seismic performance of main bridge in northern bay of Xiamen-Zhangzhou Crossing Sea Bridge from aspects of seismic fortification criteria, dynamic seismic input, dynamic finite element modeling, evaluation for seismic performance and check of seismic structure measures, etc. to provide a reference for seismic design of similar bridges.