复合材料箍筋力学性能试验研究  

Experimental Study on Mechanical Properties of Composite Stirrups

作　　者：李彪[1] 杨勇新[1] 岳清瑞[1] 余建伟 廉杰[1] 赵进阶[1] LI Biao;YANG Yongxin;YUE Qingrui;YU Jianwei;LIAN Jie;ZHAO Jinjie(Central Research Institute of Building and Construction Co.,Ltd.,Belting 100088,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang,Sichuan 621000,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]西南科技大学土木工程与建筑学院,四川绵阳621000

出　　处：《施工技术》2018年第20期22-25,共4页Construction Technology

基　　金："十三五"国家重点研发计划项目(2017YFC0703000);国家973计划资助项目(2012CB026205);专项科研基金课题(YBC2015ZX10)

摘　　要：复合材料箍筋(CFRP箍筋)抗拉强度取决于弯折处的弯拉强度,远低于CFRP箍筋直线段的强度,目前国内没有系统的试验方法。对不同规格的CFRP箍筋进行弯拉性能试验研究,主要测定CFRP箍筋的弯拉强度、弹性模量和延伸率等力学性能指标。详细介绍了CFRP箍筋的试验过程、试验方法以及破坏形态。试验结果表明:CFRP箍筋为脆性破坏,应力-应变曲线基本为直线;CFRP箍筋尺寸效应明显;试验拉伸速率建议为2～3mm/min;随着弯折半径与厚度比值的增加,弯折处强度与直线段强度的比值也越大。The tensile strength of the composite stirrup（CFRP stirrups） depends on the tensile strength at the bend, which is far below the strength of the straight line section of the FRP stirrup. There is no systematic test method for stirrup at home. Different kinds of CFRP stirrups are made on the mechanical properties test to determine some mechanical properties such as tensile strength, elastic modulus and elongation rate. The experimental process, method and failure state are introduced in detail. The results show that stress-strain curves are straight lines and the failure mechanism has brittle fracture characteristics. The mechanical properties of CFRP stirrup vary with size. The experimental drawing speed is suggested to be 2-3 mm/min. As the ratio of bending radius to thickness increases, the ratio of tensile strength at the bend to straight-line strength also increases.

关 键 词：复合材料 FRP箍筋 弯拉强度 影响因素 试验 

分 类 号：TU599[建筑科学—建筑技术科学]