刚性桩复合地基模型拟动力试验研究
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鲍鹏,刘德辉(河南大学土木建筑学院， 开封 475004)［摘要］为了研究刚性桩复合地基的抗震性能，依据相似理论，建立几何相似比为1∶10的3×3刚性桩复合地基群桩模型，采用拟动力的试验方法，研制一套试验系统。通过在桩身粘贴电阻应变片、垫层中埋设应变片、砂箱外壁连接位移传感器等方法分别测出桩身应变、垫层变形值、砂箱位移，并对上述数值进行分析研究，得出刚性桩复合地基在地震作用下的响应规律，为刚性桩复合地基在抗震设防地区的应用提供理论指导。［关键词］刚性桩复合地基； 拟动力试验； 抗震性能； 相似理论中图分类号：TU472文献标识码：A文章编号：1002848X(2013)12008904Pseudodynamic test study on rigidpile composite foundationBao Peng, Liu Dehui(School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, China)Abstract:In order to study the seismic performance of rigidpile composite foundation, a 3×3 rigidpile composite foundation pile group model with geometric similarity ratio of 1∶10 was established based on the similarity theory. A test system was developed by using pseudodynamic test methods. The pile strain, cushion deformation and sandbox displacement were measured by pasting resistance strain gauges in the pile, burying strain gauges in the cushion and connecting displacement sensors between the outer walls of the sandbox respectively. The above data was analyzed and the response of rigidpile composite foundation under seismic action was obtained, which can be theoretical guidance for the application of the rigidpile composite foundation in seismic fortification areas.Keywords:rigidpile composite foundation; pseudodynamic test; seismic performance; similarity theory*河南省科技攻关计划项目（496260015）。作者简介：鲍鹏，博士，教授，Email:cnbaop@yahoo.com.cn。参考文献［1］武思宇，宋二祥，刘华北，等. 刚性桩复合地基抗震性能的振动台试验研究［J］.岩土力学,2007,28(1)：77\|82.［2］徐自国,宋二祥.刚性桩复合地基抗震性能有限元分析［J］.岩土力学,2004,25(2):179\|184.［3］鲍鹏,苏彩丽,张利伟.基于时程分析法的刚性桩复合地基地震响应分析［J］.岩土工程学报,2011，33(S2)：101\|104.［4］李丽,鲍鹏,赵捷.刚性桩复合地基模型试验研究［J］.建筑结构,2010,40(1)：69\|70.［5］赵捷. 刚性桩复合地基三维数值分析与模型试验研究［D］. 开封：河南大学,2007.［6］苏彩丽.刚性桩复合地基抗震性能研究［D］.开封：河南大学,2010.［7］王娴明.建筑结构试验［M］. 北京：清华大学出版社,1998.
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