桩基桥墩的静力推倒分析
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摘要
该文根据日本铁道抗震设计规范建立了考虑桩构件及地基非线性的杆系有限元模型,分析了某客运专线上的桩基础的水平极限承载能力,并与我国规范m法的计算结果进行了比较。分析结果表明:当墩顶水平力较大时,随着桩侧地基土水平及竖向抗力不断进入塑性,中日两国规范计算的结果相差较大;考虑桩土相互作用的墩顶水平力-位移的骨架曲线可用三线性描述。该分析结果可为罕遇地震下桩基础的抗震分析提供理论依据。
Based on Japan Railway Anti-earthquake Design Criterion,the nonlinear bowstring finite element model considering the pile member and subgrade is set up.The article analyzes the horizontal utmost bearing capacity of the pile foundation in a special passenger transport line,and compares with the calculation result of m method in the Chinese criterion.The analyzing result makes clear that there is the greater difference between the calculation results by the criterions of China and Japan when the horizontal force at the top of pier is larger and with the soil horizontal and vertical resisting force of the subgrade at the side of pile to be continuously into plasticity.It is considered to use the trilinear description
Based on Japan Railway Anti-earthquake Design Criterion,the nonlinear bowstring finite element model considering the pile member and subgrade is set up.The article analyzes the horizontal utmost bearing capacity of the pile foundation in a special passenger transport line,and compares with the calculation result of m method in the Chinese criterion.The analyzing result makes clear that there is the greater difference between the calculation results by the criterions of China and Japan when the horizontal force at the top of pier is larger and with the soil horizontal and vertical resisting force of the subgrade at the side of pile to be continuously into plasticity.It is considered to use the trilinear description
引文
[1]陈国兴,张克绪,谢军裴.桩基抗震性能与震害机制解析[J].岩土工程师,1993,4(5):8-12.
[2]高凤昌,桥梁桩基础抗震性能分析及工程设计中的应用[J].山西交通科技,2003,(2):68-70.
[3]柴金义,于浩,阪神大地震对桥梁基础的影响[J].国外公路,2001,21(1):24-27.
[4]日本铁道技术综合研究所铁道构造物等设计标准同解说.耐震设计[R]东京:日本铁道技术综合研究所,1999.
[5]宋天齐.桩基及有关抗震问题商榷[J].工程抗震与加固改造,2006,28(2):101-104.
[6]日本铁道技术综合研究所铁道构造物等设计标准同解说.基础构造物·抗土压构造物[R]东京:日本铁道技术综合研究所,2000.
[7]张永亮,陈兴冲。黄土地基-群桩基础-桥墩的滞回特性模型试验研究[J].兰州交通大学学报,2007,26(1):48-51.
[2]高凤昌,桥梁桩基础抗震性能分析及工程设计中的应用[J].山西交通科技,2003,(2):68-70.
[3]柴金义,于浩,阪神大地震对桥梁基础的影响[J].国外公路,2001,21(1):24-27.
[4]日本铁道技术综合研究所铁道构造物等设计标准同解说.耐震设计[R]东京:日本铁道技术综合研究所,1999.
[5]宋天齐.桩基及有关抗震问题商榷[J].工程抗震与加固改造,2006,28(2):101-104.
[6]日本铁道技术综合研究所铁道构造物等设计标准同解说.基础构造物·抗土压构造物[R]东京:日本铁道技术综合研究所,2000.
[7]张永亮,陈兴冲。黄土地基-群桩基础-桥墩的滞回特性模型试验研究[J].兰州交通大学学报,2007,26(1):48-51.
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