高桩承台体系桥梁MPA目标参数的选取方法
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土木工程防灾国家重点实验室,土木工程防灾国家重点实验室,北京中交桥宇科技有限公司

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U442.5+5

基金项目:

51278376,50978194,90915011


Target parameter Selection Method in Modal Pushover Analysis of Pile Foundation System for Deep Water Bridges
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State Key Laboratory for Disaster Reduction in Civil Engineering,State Key Laboratory for Disaster Reduction in Civil Engineering,Beijing Zhongjiao Qiaoyu Science and Technology Company Ltd.

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    摘要:

    基于Chopra解决逆转现象的方法提出了最优目标控制参数概念,阐述了最优目标控制参数的理论意义和选取原则.以某上海长江大桥高桩承台体系为研究对象,实施了选取最优目标控制参数分析过程,并对该高桩承台体系进行一阶模态推倒分析、多模态推倒分析(MPA)和非线性动力时程分析.结果表明:选取最优目标控制参数可有效解决高桩承台体系在MPA分析中所遇到的逆转现象,采用最优目标控制参数进行MPA分析得到的位移响应与非线性时程分析结果精度接近,远优于一阶模态推倒分析的结果.

    Abstract:

    A theory of best control parameters (BCP) is developed based on Chopra’s approach to tackle the problem. Theoretical derivation and selection principle of BCP are also presented. A modal pushover analysis(MPA) of a pile foundation from Shanghai Changjiang Bridge is then conducted by using the developed BCP approach. First mode pushover analysis (Po 1) and nonlinear time history analysis (THA) of the pile foundation system are also conducted as the reference. The following conclusions are drawn through a comparative study: the BCP selection method efficiently resolves the reversal phenomenon in MPA of the pile foundation system; the displacement demands estimated by MPA with the selected BCP are closer to the results of THA, and much better than those provided by Po 1.

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曹飒飒,袁万城,杨俊.高桩承台体系桥梁MPA目标参数的选取方法[J].同济大学学报(自然科学版),2014,42(4):0505~0512

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历史
  • 收稿日期:2013-04-26
  • 最后修改日期:2013-12-20
  • 录用日期:2013-09-09
  • 在线发布日期: 2014-04-17
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