[1]孙治国,刘亚明,司炳君,等.基于OpenSees的桩-土-桥墩相互作用非线性数值分析模型[J].世界地震工程,2018,34(04):067-74.
 SUN Zhiguo,LIU Yaming,SI Bingjun,et al.Nonlinear analysis model for pile-soil-pier interaction based on OpenSees platform[J].,2018,34(04):067-74.
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基于OpenSees的桩-土-桥墩相互作用非线性数值分析模型
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《世界地震工程》[ISSN:/CN:]

卷:
34
期数:
2018年04期
页码:
067-74
栏目:
出版日期:
2019-01-30

文章信息/Info

Title:
Nonlinear analysis model for pile-soil-pier interaction based on OpenSees platform
作者:
孙治国1 刘亚明2 司炳君2 石岩3
1. 防灾科技学院 土木工程学院, 北京 101601;
2. 大连理工大学 建设工程学部, 辽宁 大连 116024;
3. 兰州理工大学 土木工程学院, 甘肃 兰州 730050
Author(s):
SUN Zhiguo1 LIU Yaming2 SI Bingjun2 SHI Yan3
1. School of Civil Engineering, Institute of Disaster Prevention, Beijing 101601, China;
2. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China;
3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
关键词:
桥梁抗震桩-土-桥墩相互作用数值分析拟静力分析OpenSees
Keywords:
seismic design of bridgespile-soil-pier interactionnumerical analysisquasi-static analysisOpenSees
分类号:
TU318
摘要:
基于OpenSees数值分析平台,建立了群桩-土-桥墩非线性数值分析模型。模型中桩-土水平向相互作用和桩-土竖向相互作用、桩底-土竖向相互作用分别通过p-y、t-zq-z零长度弹簧单元模拟。模型中同时考虑了群桩效应与纵筋在墩底的应变渗透和粘结滑移的影响。结合群桩基础拟静力试验结果,对数值模型的准确性进行了验证,在此基础上对土体参数特性对桩基滞回性能的影响规律进行了分析。结果表明:所建立的数值分析模型可对群桩基础滞回曲线和骨架曲线进行较为准确的模拟分析,验证了模型的可靠性。反复荷载作用下,前桩处土体的反应明显大于中桩处;土体由软黏土变为硬黏土时,墩顶侧向承载力与刚度显著增加,但土体的非线性反应减弱。
Abstract:
The nonlinear analysis model for group piles-soil-bridge pier interaction was built based on the OpenSees platform. The pile-soil horizontal interaction, pile-soil vertical interaction and pile tip-soil vertical interaction was simulated by p-y, t-z and q-z zero-length spring elements, respectively. Also, pile group effect and longitudinal bar strain penetration and bond-slip effect at the bottom of the bridge pier was considered. The accuracy of the model was verified by the result of the quasi-static test on pile group bridge foundation. At last, the influence of the soil parameters on the hysteretic behavior of the foundation was studied. The results are as follows. The model can simulate the hysteretic and skeleton curves of the pile group foundation well and the reliability of the model has been confirmed. The response of the soil surrounding the front pile is obviously greater than that surrounding the middle pile under cyclic loading. When the soft clay soil surrounding the pile is changed to be stiff clay soil, the lateral bearing capacity and stiffness of the pier top will be increased significantly, but the nonlinear response of the soil will be decreased.

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相似文献/References:

[1]宋凯,王志强,胡世德.改善桥梁结构地震性能的措施研究[J].世界地震工程,2008,(01):158.
 SONG Kai,WANG Zhi-qiang,HU Shi-de.Study on measures for improving the seismic performance of bridges[J].,2008,(04):158.

备注/Memo

备注/Memo:
收稿日期:2018-1-14;改回日期:2018-8-1。
基金项目:国家自然科学基金项目(51678150,51768042);地震科技星火计划攻关项目(XH17064);河北省高等学校科学技术研究项目(ZD2017306)
作者简介:孙治国(1980-),男,副研究员,博士,主要从事桥梁与结构工程抗震研究.E-mail:szg_1999_1999@163.com
更新日期/Last Update: 1900-01-01