（1 河南大学土木建筑学院， 开封 475004; 2 郑州大学水利与环境学院，郑州 450001）

［摘要］为研究变截面工字形钢筋混凝土桩在水平荷载作用下的受力特性，对其进行了单桩水平静载缩尺模型试验，实测得到了水平荷载作用下变截面工字形钢筋混凝土桩与土共同作用的工作性能，分析了变截面工字形钢筋混凝土桩受水平荷载作用时的内力、变形、极限承载力。结果表明，垂直翼缘方向的水平临界荷载近似为垂直腹板方向水平临界荷载的3倍，桩身最大弯矩分布在距桩顶0.34m处，桩身弯矩影响深度约为0.96m。

［关键词］水平荷载; 桩土共同作用; 变截面工字形钢筋混凝土桩; 模型试验

中图分类号：TU473.1+1      文献标识码：A      文章编号：1002-848X(2014)17-0069-03

Model test study on bearing capacity performance of variable cross-section I-shaped reinforced concrete pile under horizontal load

Ma Jindong1, Kong Dezhi1, Zhang Jianwei1,2

 (1 School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, China; 2 College of Water Conservancy & Environmental Engineering, Zhengzhou University, Zhengzhou 450001, China)

Abstract: To research the mechanical behavior of variable cross-section I-shaped reinforced concrete pile under horizontal load, horizontal static load test of single pile was carried out by reduced-scale model. Through the analysis of the measured results, the working performance of the variable across-section I-shaped reinforced concrete pile interacted with soil under horizontal load was obtained. The internal force, deformation and the ultimate bearing capacity of the variable cross-section I-shaped reinforced concrete pile under horizontal load were analyzed. Results show that horizontal critical load in direction of perpendicular to flange is approximately three times as that in direction of perpendicular to the web. The position of maximum bending moment is located at 0.34m from the top of the pile. The influence depth of pile bending moment is approximate 0.96m.

Keywords: horizontal load; pile-soil interaction; variable cross-section I-shaped reinforced concrete pile; model test

* 河南省科技厅基础与前沿技术研究项目(132300410234)，河南省教育厅科学技术研究重点项目(13A560097)。

通讯作者：张建伟，博士，副教授，硕士生导师，注册土木工程师（岩土），Email：zjw101_0@163.com。

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