GFRP筋-钢筋混杂配筋柱偏心受压裂缝形式试验研究  

Experimental research on the eccentric compression crack fom of GFRP bar-steel bar hybrid reinforcing concrete column

作　　者：王海洋 王勃[1] WANG Hai-yang;WANG Bo(School of civil engineering,Jilin Jianzhu university,Changchun 130118,China)

机构地区：[1]吉林建筑大学土木工程学院,长春130118

出　　处：《吉林建筑大学学报》2022年第3期9-14,共6页Journal of Jilin Jianzhu University

基　　金：国家自然科学基金项目(51178206);吉林省高校“十三五”科研规划项目(JJKH20170253KJ)。

摘　　要：通过7根GFRP筋-钢筋混杂配筋混凝土柱的偏心受压试验,研究混杂柱的破坏特征和裂缝.试验结果表明,受压区混凝土被压碎是混杂配筋柱破坏形式.混杂配筋柱裂缝在试验过程中首先出现在受拉区,然后发生在侧向和压缩侧,最后受压面破裂.混杂配筋柱裂缝宽度与配筋面积比成正比,与偏心距成反比,与混凝土保护层厚度成正比,与混凝土强度成反比,混杂配筋柱开裂荷载与配筋面积比,混凝土保护层厚度和混凝土强度三者皆成正比.提出了混杂配筋柱裂缝计算方法,基于等模量换算法得到平均裂缝间距和裂缝宽度计算公式,计算值与试验值比值的均值为0.977,吻合度较好.可为GFRP筋-钢筋混杂配筋柱的实际工程应用提供参考.The eccentric compression test of 7 GFRP and steel hybrid reinforcing concrete columns to study the failure mode and crack pattern. The test results show that the failure mode of the hybrid reinforcement column is concrete crush. The hybrid reinforcement column cracks first appeared in the tension area during the test,then in the lateral and compression sides,and finally the concrete crush in the compression area. The crack width of the hybrid reinforcement column is directly proportional to the reinforcement ratio,inversely proportional to the eccentric distance,and the thickness of the concrete cover and the strength of the concrete. The cracking load of the hybrid reinforcement column is directly proportional to the reinforcement ratio,concrete cover thickness and concrete strength.The formula of the average crack interval and crack width which are presented on the equivalent modulus are obtained. According to the results of the test,the average ratio value of calculation to the testvalue is 0. 977. The calculation value agrees well with test value. It can provide reference for the engineering application of the GFRP steel bar hybrid reinforcing concrete column.

关 键 词：混杂配筋柱 玻璃纤维增强复合材料(GFRP)筋 偏心受压 裂缝形式 裂缝宽度计算 

分 类 号：TG139.6[一般工业技术—材料科学与工程]