[1]韩振峰,叶爱君.桥梁群桩基础抗震能力值灵敏性分析[J].深圳大学学报理工版,2010,27(4):452-458.
 HAN Zhen-feng and YE Ai-jun.Sensitivity analysis on antiseismic capacity of bridge pile foundation[J].Journal of Shenzhen University Science and Engineering,2010,27(4):452-458.
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桥梁群桩基础抗震能力值灵敏性分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第27卷
期数:
2010年4期
页码:
452-458
栏目:
土木建筑工程
出版日期:
2010-10-31

文章信息/Info

Title:
Sensitivity analysis on antiseismic capacity of bridge pile foundation
文章编号:
1000-2618(2010)04-0452-07
作者:
韩振峰叶爱君
同济大学土木工程防灾国家重点实验室, 上海 200092
Author(s):
HAN Zhen-feng and YE Ai-jun
State Key Laboratory for Disaster Reduction of Civil Engineering, Tongji University, Shanghai 200092, P.R. China
关键词:
桥梁工程高桩承台群桩基础抗震能力二阶中心差分法纤维单元
Keywords:
bridge engineeringhigh-rise pile cappile groupantiseismic capacitysecond-order central difference methodfiber element
分类号:
U 442.5
文献标志码:
A
摘要:
探索影响桥梁高桩承台群桩基础抗震能力值的关键因素,在OpenSees平台下,对位于黏土中的高桩承台群桩基础建立非线性有限元模型,采用二阶中心差分法进行灵敏性分析.结果表明,群桩基础抗震能力值的各衡量指标,对混凝土抗压屈服强度的反应灵敏性较小,对钢筋抗拉屈服强度和土体黏聚力的反应灵敏性较大,对桩体核心混凝土截面积的反应灵敏性较平稳;差分步长取10-2倍均值是合理的.进一步的群桩基础动力可靠度分析要重点考虑钢筋抗拉屈服强度和土体黏聚力对系统失效概率的影响.
Abstract:
To explore the key parameters controlling the antiseismic capacity (or supply) of the high-rise pile cap foundation,a finite element model for such foundation lay in the uniform clay was built in the OpenSees finite element framework,and elastic-plastic static analyses were performed on the model.Meanwhile sensitivity analysis was performed on the model using second-order central difference method. The results of these analyses indicate that among some indices of the anti-seismic capacity of the high-rise pile cap foundations,the response sensitivity for the compressive strength of concrete is small,the response sensitivity for the tensile strength of reinforcements and the soil cohesive force are large,the response sensitivity for the core concrete section area is stable,and the time inerval of the finite difference taken as 10-2 order is reasonable. For the further dynamic reliability analysis of pile cap foundation,the tensile strength of reinforcements and the soil cohesive force should be treated as the important parameters affecting the system failure probability.

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备注/Memo

备注/Memo:
收稿日期:2010-04-06;修回日期:2010-09-21
基金项目:国家自然科学基金资助项目(50878147)
作者简介:韩振峰(1976-),男(汉族),安徽省巢湖市人,同济大学博士研究生.E-mail:h_z_feng@yahoo.com.cn
通讯作者:叶爱君(1970-),女(汉族),同济大学教授、博士生导师.E-mail:yeaijun@tongji.edu.cn
更新日期/Last Update: 2010-11-09