Centrifuge Modeling of Rocking Foundations on Improved Soil
Centrifuge Modeling of Rocking Foundations on Improved Soil
复制标题
改良土壤上摇摆基础的离心机模拟
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
I. Anastasopoulos
中科院分区：
文献类型：
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作者：
P. Kokkali;T. Abdoun;I. Anastasopoulos
摘要在过去的几十年里，浅层地基在承受组合载荷时的非线性响应引起了研究工程界的关注，为将此类响应纳入设计规定提供了有希望的证据。以土壤屈服或基础隆起形式出现的失效可以满足高延性需求，并增加整个结构的安全裕度。然而，可能会出现更多的长期流离失所和轮调。本文探讨了浅层土壤改良的概念，作为局部增加土壤强度的一种手段，从而限制摇摆引起的沉降。考虑到摇摆机制相对较浅，故障可能包含在已知属性的土层中，该土层延伸到基础下方较浅的深度。通过地震工程中心的一系列离心试验，探索了系统在贫瘠土壤条件下、理想土壤剖面上和改良土壤剖面上的性能。
AbstractThe nonlinear response of shallow foundations when subjected to combined loading has attracted the attention of the research engineering community over the last few decades, providing promising evidence for incorporation of such response in design provisions. Failure in the form of soil yielding or foundation uplifting may accommodate high ductility demand and increase the safety margins of the whole structure. However, increased permanent displacement and rotation may occur. This paper explores the concept of shallow soil improvement as a means to locally increase soil strength and thus limit rocking-induced settlement. Bearing in mind that the rocking mechanism is relatively shallow, failure may be contained in a soil layer of known properties that extends to a shallow depth beneath the foundation. The performance of a system in poor soil conditions, on an ideal soil profile, and on improved soil profiles was explored through a series of centrifuge tests at the Center for Earthquake Engineering ...