基于附加质量模型的管桩扭转振动研究

刘浩; 蒋国盛; 梅国雄; 梁荣柱; 吴文兵

doi:10.11779/CJGE201804016

基于附加质量模型的管桩扭转振动研究 English Version

刘浩¹,
蒋国盛¹,
梅国雄^1,2,3,
梁荣柱¹,
吴文兵^1,2,3, ,

1. 中国地质大学工程学院岩土钻掘与防护教育部工程研究中心,湖北武汉 430074;
2. 广西大学土木建筑工程学院广西防灾减灾与工程安全重点实验室,广西南宁 530004;
3. 广西大学工程防灾与结构安全教育部重点实验室,广西南宁 530004;

基金项目: 国家自然科学基金项目（51309207,51678547）; 中国博士后科学基金面上项目（2016M600711）; 中央高校基本科研业务费专项资金摇篮计划项目（CUGL150411）; 岩土钻掘与防护教育部工程研究中心开放基金项目（201402）

详细信息

作者简介:
刘浩 (1989- ),男,博士研究生,主要从事桩基动力学理论研究工作。E-mail：liuhao370@163.com。

通讯作者:
吴文兵，E-mail：zjuwwb1126@163.com

中图分类号: TU435
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出版历程
- 收稿日期: 2016-12-26
- 发布日期: 2018-04-24

Torsional dynamic response of pipe piles based on additional mass model

1. Engineering Research Center of Rock-Soil Drilling & Excavation and Protection, Ministry of Education, Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;
2. Guangxi Key Laboratory of Disaster Prevention and Structural Safety, College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
3. Key Laboratory of Disaster Prevention and Structural Safety, Ministry of Education, Guangxi University, Nanning 530004, China;

摘要

摘要: 基于附加质量模型研究了管桩的扭转振动特性,为管桩的无损检测、动力基础设计和抗震设计提供了新的理论依据。首先,推导出管桩桩顶复刚度和速度频域响应解析解及半正弦脉冲激振力作用下桩顶速度时域响应半解析解;然后将该文解与经典的平面应变解进行对比,验证本文解的合理性;最后分析土塞高度和土塞与管桩之间的阻尼作用对管桩扭转振动特性的影响。分析表明：土塞高度和土塞与管桩之间的阻尼作用是影响管桩扭转复刚度的重要因素;随着土塞高度的增加和土塞与管桩之间阻尼作用的增强,填充土塞段管桩的扭转综合波速会逐渐减小。
- 管桩 /
- 扭转振动 /
- 土塞效应 /
- 附加质量模型 /
- 动力特性
Abstract: The torsional dynamic response of pipe piles is investigated based on the additional mass model. It can provide a new theoretical basis for non-destructive integrity testing of pipe piles, design of dynamic foundation and earthquake-resistant design. First, the analytical solutions for complex stiffness and velocity response in the frequency domain and the corresponding quasi-analytical solutions for velocity response in the time domain at pile head are derived. Then, the rationality and accuracy of the solutions are verified by comparing the dynamic behaviors of the pipe piles calculated by the additional mass model with those based on the plane strain model. Finally, the influences of the soil plug height and the damping effect between soil plugs and pipe piles on the torsional dynamic response of pipe piles are analyzed. The results show that the soil plug height and the damping effect between soil plugs and pipe piles have an important influence on the torsional complex stiffness of pipe piles. The test torsional velocity of pipe pile decreases as the soil plug height and the damping effect between soil plugs and pipe piles increase.
- pipe pile /
- torsional vibration /
- soil plug effect /
- additional mass model /
- dynamic characteristic

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参考文献(18)

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