无机聚合物混凝土-钢筋拉拔有限元分析  

Finite element analysis of pullout tests on inorganic polymer concrete-steel bar

作　　者：袁晓辉[1] 卢哲安[1] 任志刚[2] 张传银[1] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点试验室,湖北武汉430070 [2]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《西安建筑科技大学学报（自然科学版）》2013年第2期209-215,共7页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51078298)

摘　　要：通过制作强度等级为IPC40的3个无机聚合物混凝土(IPC)-钢筋拉拔试件,钢筋类型为光圆钢,锚固深度分别为100mm、120mm和150mm,对其进行拔出试验,获得拉拔荷载位移曲线,并通过试验获得IPC的弹性模量及应力-应变关系曲线,在此基础上利用弹簧单元模拟粘结滑移关系建立钢筋与混凝土分离模型,对整个拉拔过程进行模拟.分析结果:荷载位移曲线试验数据和模型数据上升段吻合良好,下降段存在一定差距,但总体变化趋势一致;模型分析最大极限拉拔荷载值与试验值误差为1.2%,极限位移误差为0.8%;有限元计算钢筋应力与实测值吻合良好.结果表明:采用弹簧单元能够真实有效的模拟无极聚合物混凝土与钢筋之间的粘结滑移关系.A pullout load displacement curve is obtained throughs inorganic polymer light-type concret-steel bar pullout test pieces with the concrete strength IPC40 and the anehourage depth respectively of 100mm, 120 mm, and 150 ram. From the experiment IPS elastic modulus as well as the stress strain are derived. On the basis of this, spring element is also used to stimulate the bond slip relationship in establing the steel and conerete separation model, and to stimullate the whole pullout process. The rising segment of the load displacement curve of experimental data is in good agreement with the model data. The deseending segment has a certain gap, while the overrall trend remains the same. The error between the maximurn limit pullout load and the experinccntal value remains at 12%, the limit displacement error at 0.8%, and the steel stress value of finite elcment calculation is good agreement with that of the data measured. The results show that the spring unit can be real and effective in stimulating the bond slip relationship between inorganie polymer concrete and reinforcing bar.

关 键 词：无机聚合物混凝土 拔出试验 弹簧单元 粘结滑移 

分 类 号：TU5[建筑科学—建筑技术科学]