桩基托换结构的动力分析
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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。
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.
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.
引文
[1]彭振斌.托换工程设计计算与施工[M].北京:中国地质大学出版社,1997.
[2]涂强.深圳地铁百货广场大厦桩基托换与变形控制[J].四川建筑,2000(20):249-254.
[3]金海国.暗挖地铁穿越广深铁路桥的桩基托换施工技术[J].铁道建筑技术,2004(6):34-37.
[4]高俊合,张澍曾,柯在田,等.大轴力桩基托换梁-柱接头模型试验[J].土木工程学报,2004(9):62-68.
[5]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.
[6]王松涛,曹资.现代抗震设计方法[M].北京:中国建筑工业出版社,1997.
[2]涂强.深圳地铁百货广场大厦桩基托换与变形控制[J].四川建筑,2000(20):249-254.
[3]金海国.暗挖地铁穿越广深铁路桥的桩基托换施工技术[J].铁道建筑技术,2004(6):34-37.
[4]高俊合,张澍曾,柯在田,等.大轴力桩基托换梁-柱接头模型试验[J].土木工程学报,2004(9):62-68.
[5]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.
[6]王松涛,曹资.现代抗震设计方法[M].北京:中国建筑工业出版社,1997.
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