钢与混凝土界面的基本物理参数测试  

Tests of Basic Physical Parameters of Steelconcrete Interface

作　　者：苏庆田[1] 杜霄[1] 李晨翔 姜旭[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]上海市政交通设计研究院有限公司,上海200030

出　　处：《同济大学学报（自然科学版）》2016年第4期499-506,共8页Journal of Tongji University:Natural Science

基　　金：国家"九七三"重点基础研究发展计划(2013CB036303)

摘　　要：为定量了解组合梁中钢与混凝土界面上粘接力及摩擦系数等基本物理参数的大小,通过一系列试验测试了工程上常用的钢与混凝土界面涂装形式的黏结强度和摩擦系数.设计制作了16组试件测试钢与混凝土之间的抗剪黏结强度,考虑了试件界面尺寸效应、不同界面涂装形式及不同的法向压力的影响;设计制作了6组试件测试不同界面涂装形式下的钢与混凝土界面抗拉黏结强度;设计制作了6组试件测试了不同界面涂装形式下钢与混凝土界面的静、动摩擦系数.研究表明：界面尺寸效应对钢与混凝土界面的强度影响不大;界面涂装形式对界面的黏结强度影响较大,抗剪强度在0.04~0.28 MPa之间,抗拉强度在0.38~0.82 MPa之间,静摩擦系数在0.73~1.06之间,动摩擦系数在0.5~0.74之间;法向压力对界面的剪切黏结强度影响较大,且满足库仑摩擦模型.In order to quantify the basic physical parameters of steel-concrete interface of composite girders, a series of experiments were conducted to measure the bond strength and friction coefficients of steel-concrete interface with different painting ways which are commonly used in engineering. 16 groups of specimens were designed and tested to measure the shear bond strength of steel-concrete interface with a consideration of the influence of specimen size effect, painting way and normal pressure of the interface. 6 groups of specimens with different painting ways were designed and tested to measure the tensile bond strength of steel-concrete interface. Another 6 groups of specimens with different painting ways were designed and tested to measure the static and dynamic friction coefficient of steel-concrete interface. The results of tests show that the size of steel-concrete interface has little influence on the bond strength, but the painting way of the interface has great effect on the bond strength. With different painting ways, the shear bond strength is between 0.04 and 0. 28 MPa, the tensile bond strength is between 0.38 and 0.82 MPa, the static friction coefficient is between 0. 73 and 1. 06, and the dynamic friction coefficient is between 0.50 and 0.74. The normal pressure and shear bond strength of steel-concrete interface are correlated, which follows the Coulomb friction model.

关 键 词：组合梁 黏结强度 摩擦 试验 

分 类 号：TU398[建筑科学—结构工程]