不同加载模式下全直桩码头结构Pushover分析

以江苏某全直桩码头结构段为研究对象，建立空间有限元模型，选取五种具有代表性的加载模式，采用SAP2000软件，分别对全直桩码头横向和纵向进行Pushover分析。研究了加载模式对结构对称性、结构顶点位移与基底剪力的关系曲线、屈服破坏机制等的影响。结果表明：五种加载模式对码头横向的分析结果总体差别不大，但对码头纵向，由于桩基刚度对纵轴不对称，一阶振型加载模式的分析结果与其它四种加载模式相比有较大差异；码头结构横向抗震能力高于结构纵向抗震能力；桩基塑性铰一般由陆侧向海侧发展，同一桩基，由底端向顶端发展。

Pushover analysis of all-vertical-piled wharf under different load patterns

A spatial finite element model was built, a structural segment of all-vertical-piled wharf is studied by pushover under five different load patterns by SAP2000 along the transverse and longitudinal directions. The effects of load patterns on the results of structural symmetry, relation of base shear and top displacement, the yield sequence of wharf structure are researched. The results show that the result of analysis under five different load patterns along the transverse wharf is small, but for longitudinal wharf, due to the asymmetry of pile foundation stiffness on the vertical axis, the results of analysis under first vibration mode is bigger compared with the other four load patterns; For wharf structure, the transverse seismic capacity is higher than the longitudinal structure; The plastic hinge develops by land side to sea side in general, from the bottom to the top for the same pile foundation.