桩基托换结构的动力分析

Structural Dynamic Analysis of Underpinning Piles

中文关键词:桩基托换结构  地震  有限元  时程分析

英文关键词:underpinning piles  earthquake  finite element  time history analysis

中文摘要:

      以津滨轻轨桩基托换工程为例，用有限元软件ANSYS模拟此托换结构，通过静力分析结果与施工实测的应力进行对比分析，验证模型的有效性及参数选择的合理性。按照建筑抗震设计规范GB50011—2001要求，选取合适的地震波，采用时程分析法，模拟了托换结构在单向地震荷载作用下的动力响应，结构在设计烈度地震下安全。可供类似桩基托换结构的动力反应分析参考。

英文摘要:

      Binhai Tianjn project of underpinning piles is taken as an example, and the finite element models for analysis of underpinning piles is established by the software ANSYS. The effect of the model and the proper selection of the parameters are verified by comparing the stresses obtained from the present model and the actually measured stresses. According to the demand of the seismic design criterion GB50011—2001, selecting appropriate earthquake wave and using the time history analysis method, the dynamic responses for the finite model is simulated under one dimensional level seismic load and the result shows that the underpinning piles is safe under design earthquake intensity. This study can be taken as a reference for the design and dynamic analysis of underpinning piles.