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  单东萌,杨秋宁,毛明杰,张尚荣.钢纤维掺量对钢筋混凝土桥面板冲切性能影响[J].震灾防御技术,2019,14(3):584-590, DOI:10.11899/zzfy20190311.

钢纤维掺量对钢筋混凝土桥面板冲切性能影响
摘要:    通过对钢纤维体积率为0和0.38%的双向板试件进行冲切试验,得到试件的破坏形态、钢筋和混凝土荷载-应变规律等,进而量化评估钢纤维掺量对钢筋混凝土桥面板冲切性能的影响。结果表明:钢纤维体积率为0与0.38%的试件相比,相同荷载作用下后者的钢筋、混凝土应变较小;首条裂缝的出现时间推迟;试件在冲切破坏时挠度变形较大且板底表面混凝土脱落较少。
作者单位
单东萌 宁夏大学, 土木与水利工程学院, 银川 750021 
杨秋宁 宁夏大学, 土木与水利工程学院, 银川 750021 
毛明杰 宁夏大学, 土木与水利工程学院, 银川 750021 
张尚荣 宁夏大学, 土木与水利工程学院, 银川 750021 
关  键  词:冲切强度  钢纤维  钢筋混凝土桥面板  破坏形式
DOI:10.11899/zzfy20190311
基金项目:国家自然科学基金(51468052),宁夏回族自治区科技支撑计划项目(2018BFH03002)
收稿日期:2019-01-15
作者简介:单东萌,女,生于1994年。硕士研究生。主要从事混凝土结构研究。E-mail:467614539@qq.com
通讯作者:
Effect of Steel Fiber Content on Punching Shear Performance of Reinforced Concrete Slab
Abstract:      In order to study the influence of steel fiber content on the punching performance of reinforced concrete slabs, we conducted the punching test of two-dimensional plate specimens with steel fiber volume fractions of 0 and 0.38%, and obtained the failure modes, the law of bars strains and concrete strains of the specimens. Then, we quantitatively evaluated the influence of steel fiber content on the punching performance of reinforced concrete slabs. The results show that comparing with the specimens with 0 and 0.38% steel fiber volume, the bars strains and concrete strains of the latter are less under the same load, and the first crack was delayed. The deflection of the specimen during punching failure is larger and less concrete on the bottom surface of the specimen shed.
Keywords:  Punching strength  Steel fiber  Reinforced concrete slab  Destructive form
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