纤维织物增强高延性混凝土加固RC短柱抗剪性能试验研究  

Experimental Study on Shear Performance of RC Short Columns Strengthened by Textile Reinforced High Ductile Concrete

作　　者：邓明科[1] 雷恒 张雨顺 郭莉英 张伟[1] DENG Mingke;LEI Heng;ZHANG Yushun;GUO Liying;ZHANG Wei(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Shanghai Jianke Engineering Consulting Co.,Ltd.,Shanghai 200032,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]上海建科工程咨询有限公司,上海200032

出　　处：《湖南大学学报（自然科学版）》2024年第1期79-89,共11页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51578445);西安市重大科技创新计划项目(20191522415KYPT015JC017)。

摘　　要：为研究纤维织物增强高延性混凝土(TR-HDC)加固钢筋混凝土短柱的抗剪性能,设计了6根钢筋混凝土柱,包括2个对比柱和4个TR-HDC加固柱.通过低周反复荷载试验,对比分析剪跨比、纤维织物层数对试件破坏形态、变形、承载力和耗能能力的影响.结果表明:采用TR-HDC加固钢筋混凝土短柱,可显著提高其抗剪承载力;TR-HDC与原混凝土柱协同工作性能良好,加固后的混凝土柱的变形、承载力和耗能能力明显提高;增加纤维织物的层数对钢筋混凝土短柱的抗剪承载力提高幅度较小,但可大幅增强柱的耗能和变形能力;剪跨比较大时,更有利于发挥TR-HDC加固材料的力学性能.基于桁架-拱模型,提出TR-HDC加固钢筋混凝土短柱的抗剪承载力计算方法,计算结果较准确.To study the shear performance of reinforced concrete(RC)short columns strengthened with textile-reinforced high ductile concrete(TR-HDC),six RC columns,including two control columns and four columns strengthened with TR-HDC,were designed.The effects of the shear span-to-effective depth ratio and the layers of textile on the failure mode,deformation,bearing capacity,and energy dissipation capacity of the specimens were compared and analyzed under low cyclic loading tests.The experimental results show that the use of TR-HDC can obviously improve the shear capacity of the RC short columns;TR-HDC works well with the original concrete column,and the deformation,bearing capacity,and energy dissipation capacity of the specimens are significantly improved after strengthening with TR-HDC;increasing the number of layers of textile can slightly increase the shear capacity of the member,but it can greatly enhance the energy dissipation and deformation capacity of the RC short column;when the shear span is relatively large,it is more beneficial to exert the mechanical properties of TR-HDC reinforcement materials.Based on the truss-arch model,a calculation method for the shear capacity of the RC short columns strengthened with TR-HDC is proposed.The calculation results are more accurate.

关 键 词：低周反复荷载 纤维织物增强高延性混凝土 加固 RC短柱 抗剪承载力 

分 类 号：TU375.1[建筑科学—结构工程]