无腹筋FRP筋梁抗剪承载力计算方法对比  

THE CALCULATION METHOD OF SHEAR CAPACITY OF FRP-REINFORCED CONCRETE BEAMS WITHOUT STIRRUPS

作　　者：王勃[1,2] 周鹍 WANG Bo;ZHOU Kun(School of Civil Engineering,Jilin Jianzhu University,Changchun 130118,China;Jilin Structural and Earthquake Resistance Technology Innovation Center,Changchun 130118,China)

机构地区：[1]吉林建筑大学土木工程学院,长春130118 [2]吉林省结构与抗震科技创新中心,长春130118

出　　处：《低温建筑技术》2022年第5期52-56,共5页Low Temperature Architecture Technology

基　　金：国家重点研发计划项目(2017YFC0806100);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：收集整理220根集中荷载作用下的无腹筋FRP筋混凝土梁受剪试验数据,建立无腹筋FRP筋混凝土梁抗剪承载力数据库。对比分析GB 50608-2020、ACI 440.1R-15、CSA.S806-12和Nehdi公式的抗剪承载力计算方法,研究各种方法对无腹筋FRP筋混凝土梁的适用性和准确性,并讨论剪跨比和截面有效高度等因素对抗剪承载力的影响。研究表明CSA.S806-12公式的预测结果最准确;未考虑剪跨比和截面尺寸效应影响的GB 50608-2020、ACI 440.1R-15预测结果过于保守;有效高度大于600mm时,Nehdi公式的预测结果不安全。相关结果为FRP混凝土梁的工程应用提供理论参考。An experiment database was established with a total of 220 FRP-reinforced beams without stirrups in shear failure under concentrated loads.The shear capacity calculation of GB 50608-2020,ACI 440.1R-15,CSA.S806-12,and Nehdi formulas were compared.The applicability and accuracy of each formula for FRP-reinforced concrete beams,as well as the shear span ratio and effective depth on the shear strength was studied.The results shows that the prediction of CSA.S806-12 was more accurate than the others.The GB 50608-2020 and ACI 440.1R-15 provided conservative predictions without the effect of shear span ratios and member sizes.The predic⁃tion results of Nehdi formulas were less than the experimental results as the effective depth was less than 600 mm.Relevant results may provide theoretical reference for engineering application of FRP-reinforced concrete beams.

关 键 词：无腹筋梁 FRP筋 抗剪承载力 

分 类 号：TU312[建筑科学—结构工程]