Cyclic behavior of laterally loaded concrete piles embedded into cohesive soil
Cyclic behavior of laterally loaded concrete piles embedded into cohesive soil
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DOI：
10.1002/eqe.744
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发表时间：
2008-01
影响因子：
4.5
通讯作者：
R. Tuladhar;T. Maki;H. Mutsuyoshi
中科院分区：
文献类型：
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作者：
R. Tuladhar;T. Maki;H. Mutsuyoshi
现代抗震设计规范规定，反应分析应考虑包括上部结构、基础和地基在内的完整结构体系。然而，对于一个完整的结构体系的地震反应分析方法的发展，它是首先必须澄清的行为，土和桩在地震。在本研究中，对埋入地下的混凝土桩进行了全尺寸单调和反向循环横向荷载试验。试验桩为空心预制预应力混凝土桩，外径300 mm，厚度60 mm，桩长26 m。然后进行三维（3D）有限元分析，以分析研究实验样本的行为。研究表明，与单调加载相比，当受到循环加载时，桩的横向承载能力会降低。在分析中的土壤和桩表面之间的界面元素的使用效果也进行了研究。通过合理考虑桩土本构模型、桩土界面单元以及循环荷载作用下土体刚度退化等因素，建立了能较好地模拟桩土相互作用的三维分析方法。版权所有© 2007约翰威利父子有限公司。
Modern seismic design codes stipulate that the response analysis should be conducted by considering the complete structural system including superstructure, foundation, and ground. However, for the development of seismic response analysis method for a complete structural system, it is first imperative to clarify the behavior of the soil and piles during earthquakes. In this study, full‐scale monotonic and reversed cyclic lateral loading tests were carried out on concrete piles embedded into the ground. The test piles were hollow, precast, prestressed concrete piles with an outer diameter of 300 mm and a thickness of 60 mm. The test piles were 26 m long. Three‐dimensional (3D) finite element analysis was then performed to study the behavior of the experimental specimens analytically. The study revealed that the lateral load‐carrying capacity of the piles degrades when subjected to cyclic loading compared with monotonic loading. The effect of the use of an interface element between the soil and pile surface in the analysis was also investigated. With proper consideration of the constitutive models of soil and pile, an interface element between the pile surface and the soil, and the degradation of soil stiffness under cyclic loading, a 3D analysis was found to simulate well the actual behavior of pile and soil. Copyright © 2007 John Wiley & Sons, Ltd.