高速铁路重力式桥墩桩基础的抗震设计及研究进展

doi:10.13722/j.cnki.jrme.2014.0278

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摘要我国高速铁路桥梁广泛采用混凝土重力式桥墩及钻孔灌注桩基础。针对高速铁路桥梁的主要结构特征，介绍了其地震反应特点。由于高速铁路桥梁墩身横桥向刚度及截面抗力较大，导致桩基础承受的地震作用也较大，使桩基础基于强度控制的能力保护设计难于实现。通过对比AASHTO(LRFD)，Eurocode 8、新西兰桥梁抗震规范及日本铁道构筑物抗震设计规范对桩基础抗震性能的要求，提出了高速铁路桥梁桩基础由能力保护设计向基于性能的抗震设计思想转化的必要性。建议应根据桥梁的重要性，对桩基础采用多级抗震设防思想，合理地利用地基土的塑性耗能作用，以减少桥墩的水平地震作用。介绍了强震下桩基础的非线性静力计算模型的最新研究进展，总结了地基土非线性的合理模拟方法。

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关键词 ：桩基础, 高速铁路, 重力式桥墩, 抗震设计, 计算模型

Abstract：Concrete gravity pier with bored pile foundation are widely used in high speed railway bridge in China. According to the main structural characteristics of high speed railway bridge，the characteristics of seismic response were introduced. Due to the larger transverse rigidity of pier shafts and larger cross-section resistance，seismic action of high speed railway bridge pile foundation is also bigger，so it is difficult to achieve capacity design based on intensity control. By comparing the different requirements of seismic performance for pile foundation from AASHTO(LRFD)，Eurocode 8，bridge manual of transit New Zealand and seismic design standards and explanations for railway structures of Japan，it is necessary that the pile foundation of high speed railway bridge should transform from capacity design to performance-based seismic design. The ideal of multiple seismic fortifications should be adopted for pile foundation according to the importance of bridges，and plastic energy dissipation of foundation soil should be reasonably used in order to reduce horizontal earthquake action of bridge piers. The latest research progress of the nonlinear static calculation model of pile foundation under strong earthquake was introduced，and reasonable simulation method for the nonlinearity of foundation soil was summarized.

Key words： pile foundations high-speed railway gravity pier seismic design calculation model

引用本文:

张永亮1，2，宁贵霞2，陈兴冲2. 高速铁路重力式桥墩桩基础的抗震设计及研究进展[J]. 岩石力学与工程学报, 2015, 34(s1): 3518-3524.
ZHANG Yongliang1，2，NING Guixia2，CHEN Xingchong2. SEISMIC DESIGN AND RESEARCH DEVELOPMENT FOR PILE FOUNDATIONS OF GRAVITY PIER IN HIGH-SPEED RAILWAY BRIDGE. , 2015, 34(s1): 3518-3524.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.0278 或 http://www.rockmech.org/CN/Y2015/V34/Is1/3518

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