内嵌CFRP板条加固预应力混凝土梁非线性分析  

Nonlinear analysis of prestressed reinforced concrete beams strengthened with near surface mounted CFRP strips

作　　者：杨佳[1,2] 王连广[2] 孙琦[3] YANG Jia;WANG Lianguang;SUN Qi(College of Architectural and Civil Engineering,Shenyang University,Shenyang 110044,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110189,China;College of Civil and Transportation Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]沈阳大学建筑工程学院,辽宁沈阳110044 [2]东北大学资源与土木工程学院,辽宁沈阳110819 [3]辽宁工程技术大学土木与交通学院,辽宁阜新123000

出　　处：《混凝土》2019年第7期111-115,共5页Concrete

基　　金：国家自然科学基金项目（51504125）;中国博士后基金（2017M611253）;辽宁省自然科学基金（20170540303）

摘　　要：为研究内嵌CFRP板条加固预应力钢筋混凝土T形梁的工作性能,考虑材料非线性,编制计算程序,对加固梁与未加固梁在单调荷载作用下的整个受力过程进行分析,并将分析结果与试验结果对比.讨论了混凝土强度等级、混凝土翼缘板宽度、厚度及CFRP板条加固量等因素对加固梁力学性能的影响.结果表明,该分析方法的理论值与试验值吻合良好,加固梁的承载能力和刚度均随着混凝土强度等级、混凝土翼缘板宽度和厚度以及CFRP板条加固量的增加而增加;混凝土强度等级、混凝土翼缘板宽度及CFRP板条加固量是影响加固梁承载能力和刚度的主要因素。In order to investigate the performance of prestressed reinforced concrete(PRC)beams strengthened with near surface mounted(NSM)carbon fiber reinforced polymer(CFRP)strips,computing program was worked out which consider material nonlinearity by using finite ribbon method.The bearing analysis of strengthened beam and un-strengthened beam under the monotone load were preceded.The analysis results were compared with the test results.The influence of concrete strength grade,concrete flange width,concrete flange thickness and CFRP quantity on the performance of strengthened beams was also evaluated.The results indicate that the calculated results of analytical method agree well with the experimental results.The bearing capacity and stiffness of strengthened beams are enhanced evidently with the concrete strength grade,concrete flange width,and CFRP quantity.

关 键 词：预应力钢筋混凝土梁 抗弯性能 非线性分析 碳纤维增强复合材料 

分 类 号：TU528.7[建筑科学—建筑技术科学]