FRP箍筋混凝土梁斜裂缝宽度实验研究  

Experimental study on diagonal crack width of FRP stirrup concrete beams

作　　者：李文龙 张苛 于干 谢巍 LIWenlong;ZHANG Ke;YU Gan;XIEWei(College of Information Engineering,Fuyang Normal University,Fuyang Anhui 236041,China)

机构地区：[1]阜阳师范大学信息工程学院,安徽阜阳236041

出　　处：《阜阳师范大学学报（自然科学版）》2020年第3期19-23,共5页Journal of Fuyang Normal University:Natural Science

基　　金：安徽省自然科学基金项目(1908085QE217);公路养护技术国家工程实验室开放基金(kfj180108);阜阳师范大学信息工程学院科学研究项目(2018FXGZK02)资助。

摘　　要：为研究FRP箍筋混凝土梁的斜裂缝开展规律,本文选用GFRP筋,设计了5根GFRP箍筋混凝土梁和1根普通钢箍筋混凝土梁的实验。分析了箍筋种类、剪跨比、配箍率等因素对其斜裂缝发展过程及最大宽度的影响。结果表明GFRP箍筋混凝土梁斜裂缝的开展规律与普通混凝土梁类似,剪跨比和配箍率是影响其斜裂缝宽度的重要因素。结合实验数据,提出了适用于FRP箍筋混凝土梁斜裂缝宽度的计算公式,并通过数据校核,能够满足精度要求。In order to study the law of diagonal crack development of fiber-reinforced composite stirrup concrete beams,glass fiber reinforced composite materials(GFRP bars)were selected,and five GFRP stirrup concrete beams and one ordinary steel stirrup concrete beam were designed and manufactured in this paper.The effects of stirrup type,shear span ratio and stirrup reinforcement ratio on the development process and maximum width of diagonal cracks in GFRP stirrup concrete beams were analyzed.The results show that the development law of diagonal cracks of GFRP stirrup concrete beams is similar to that of normal concrete beam,the shear span ratio and stirrup ratio are the important factors affecting the width of diagonal crack.Based on the experimental data,the calculation formula for the width of diagonal crack of FRP stirrup concrete beam is proposed,and the data can be verified to meet the accuracy requirements.

关 键 词：GFRP箍筋 普通混凝土梁 斜裂缝宽度 

分 类 号：TU375.1[建筑科学—结构工程]