BFRP筋再生混凝土无腹筋深梁抗剪承载力  

Shear Capacity of Basalt Fiber Reinforced Polymer Reinforced Recycled Concrete Deep Beam Without Web Reinforcement

作　　者：刘华新[1] 柳根金 王学志[1] 孙英明[1] 

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121001

出　　处：《四川大学学报（工程科学版）》2015年第5期17-22,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：辽宁省高等学校优秀人才支持计划资助项目(LR2012020);辽宁省自然科学基金资助项目(201501670)

摘　　要：为研究BFRP筋再生混凝土无腹筋深梁抗剪承载力,完成了9根集中荷载作用下的BFRP筋再生混凝土无腹筋深梁的抗剪试验,分析了深梁的破坏过程、破坏形态及剪跨比、BFRP筋配筋率、再生混凝土抗压强度对梁抗剪承载力的影响,并基于加拿大规范和试验数据拟合出了BFRP筋再生混凝土无腹筋深梁抗剪承载力计算公式。结果表明:BFRP筋再生混凝土深梁主要发生剪切破坏,随剪跨比增大,破坏形式由剪切破坏向弯剪破坏转变;试验梁的抗剪承载力随剪跨比的增大而减小,随BFRP筋配筋率和再生混凝土抗压强度的提高而增加;采用所提公式的计算结果与试验值吻合较好,且具有一定安全度。In order to study the shear capacity of basalt fiber reinforced polymer reinforced recycled concrete deep beam without web reinforcement ,9 deep beams under 4 point bending test were conducted. The failure process and failure mode of the tested beam were analyzed. The relationship of shear strength among the shear span ratio, reinforcement ratio of BFRP rebar and the compressive strength of recycled concrete was also discussed, respectively. A formula based on Canadian specification and data fitting for calculating the shearing capacity of the specimens was proposed. Results showed that the main failure mode of BFRP reinforced recycled concrete deep beam without web reinforcement was the shear failure and with the increase of shear span ratio, the shear failure transforms to flexural-shear failure. The shear capacity of experimental beams decreased with the increase of the shear span ratio,while increased with the increase of the reinforcement ratio of BFRP reinforcement and compressive strength of recycled concrete. The predicted results of the adopted cal- culation model fitted well with the test results and had a certain degree of safety.

关 键 词：BFRP筋 再生混凝土 深梁 抗剪承载力 

分 类 号：TU312[建筑科学—结构工程]