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（1 河南大學(xué)土木建筑學(xué)院， 開(kāi)封 475004; 2 鄭州大學(xué)水利與環(huán)境學(xué)院，鄭州 450001）

［摘要］為研究變截面工字形鋼筋混凝土樁在水平荷載作用下的受力特性，對(duì)其進(jìn)行了單樁水平靜載縮尺模型試驗(yàn)，實(shí)測(cè)得到了水平荷載作用下變截面工字形鋼筋混凝土樁與土共同作用的工作性能，分析了變截面工字形鋼筋混凝土樁受水平荷載作用時(shí)的內(nèi)力、變形、極限承載力。結(jié)果表明，垂直翼緣方向的水平臨界荷載近似為垂直腹板方向水平臨界荷載的3倍，樁身最大彎矩分布在距樁頂0.34m處，樁身彎矩影響深度約為0.96m。

［關(guān)鍵詞］水平荷載; 樁土共同作用; 變截面工字形鋼筋混凝土樁; 模型試驗(yàn)

中圖分類號(hào)：TU473.1+1      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：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

* 河南省科技廳基礎(chǔ)與前沿技術(shù)研究項(xiàng)目(132300410234)，河南省教育廳科學(xué)技術(shù)研究重點(diǎn)項(xiàng)目(13A560097)。

通訊作者：張建偉，博士，副教授，碩士生導(dǎo)師，注冊(cè)土木工程師（巖土），Email：zjw101_0@163.com。

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