超高性能混凝土T形截面梁受剪性能试验研究  

Experimental study on shear behavior of UHPC-T beams

作　　者：丁文胜 汪裕章 聂振林 王涛 杨帅 DING Wensheng;WANG Yuzhang;NIE Zhenlin;WANG Tao;YANG Shuai(School of Urban Construction and Safety Engineering,Shanghai Institute of Technology,Shanghai 201418,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]上海应用技术大学城市建设与安全工程学院,上海201418 [2]东南大学土木工程学院,南京211189

出　　处：《应用技术学报》2024年第1期55-62,共8页Journal of Technology

基　　金：国家自然科学基金项目(51978161)资助。

摘　　要：对9片超高性能混凝土(UHPC)T形梁设计进行了受剪性能试验,分析钢纤维掺量、配箍率和剪跨比等主要参数对试验梁破坏形态、裂缝开展过程和抗剪承载力的响应影响规律。基于公开发表的57片UHPC梁受剪实测数据,分析对比了既有多国规范的抗剪承载力计算方法。试验结果表明:UHPC-T梁具有较高的抗剪承载力和延性,2%~3%的配纤率有助于更好地发挥钢纤维的抗剪贡献,既有规范对UHPC-T梁的抗剪承载力计算偏保守,对钢纤维的贡献有待进一步研究。This paper designs nine ultra-high performance concrete(UHPC)T-beams for shear performance tests and analyzes the influence of main parameters,such as steel fiber content,stirrup ratio,and shear spanto-depth ratio on the failure mode,crack propagation process,and ultimate shear strength of the test beams.Based on the published data of the ultimate shear strength of 57 UHPC beams,it compares shear strength calculation methods of existing standards from multiple countries.The results commonly indicated that a higher fiber content increased the ultimate shear strength and ductility.A fiber content ratio of 2%to 3%helps to better utilize the shear contribution of steel fibers.Shear strength equations in existing standards were found to underestimate the shear capacity of UHPC T-beams,and the contribution of steel fibers to the ultimate shear strength of UHPC requires further research.

关 键 词：超高性能混凝土 配纤率 配箍率 剪跨比 受剪性能 

分 类 号：TU375[建筑科学—结构工程]