钢丝网混凝土薄板受弯性能试验研究  

Experimental study on flexural behavior of steel wire mesh concrete sheet

作　　者：张金丹 陆鹏远 陈宜虎 叶小刚 何青友 ZHANG Jindan;LU Pengyuan;CHEN Yihu;YE Xiaogang;HE Qingyou(School of Architecture and Electrical Engineering,Hezhou University,Hezhou 542899,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,China;Ningbo Urban Construction Design and Research Institute Co.,Ltd.,Ningbo 315012,China)

机构地区：[1]贺州学院建筑与电气工程学院,贺州542899 [2]桂林理工大学土木与建筑工程学院,桂林541004 [3]宁波市城建设计研究院有限公司,宁波315012

出　　处：《建筑结构》2024年第22期74-80,共7页Building Structure

基　　金：广西重点研发计划(桂科AB21220046、桂科AB22036001);广西自然科学基金项目(2018GXNSFAA050145);广西高校中青年教师科研基础能力提升项目(2019KY0730);贺州市科学研究与技术开发项目(贺科技20001、贺科技20002、贺科技2024019);大学生创新创业训练计划项目(202011838065)。

摘　　要：为研究钢丝网对混凝土薄板受弯性能的影响,设计制作了6块混凝土薄板进行受弯性能试验,分析在1/3板跨集中荷载下混凝土薄板的破坏形态,研究钢丝网对混凝土薄板开裂荷载、裂缝宽度和间距以及极限荷载的影响。结果表明:在混凝土薄板内添加钢丝网能提高混凝土薄板的抗裂性能,相对普通混凝土薄板,钢丝网混凝土薄板的裂缝间距和宽度平均减少25%;同时添加钢丝网对混凝土薄板的开裂荷载和抗弯承载力也有较大提升,开裂荷载最大提升幅度达到117%倍,极限荷载提升幅度最大达44%;并且钢丝网网格尺寸越小,提升效果越好。在试验的基础上,考虑了不同尺寸钢丝网对混凝土的约束作用,推导出了钢丝网混凝土薄板受弯承载力计算建议公式。In order to study the influence of steel wire mesh on the flexural behavior of concrete sheet,six concrete sheets were designed and produced for flexural behavior testing,the destruction pattern of concrete sheets under 1/3 plate span concentration load was analyzed,and the influence of steel wire mesh on the cracking load,crack width and spacing,and ultimate bearing capacity of concrete sheets was studied.The results show that adding steel wire mesh in concrete sheets can improve the crack resistance of concrete sheets,reduce the crack spacing and width of ordinary concrete sheet by an average 25%.At the same time adding steel wire mesh on the cracking load and the bending bearing capacity of the concrete sheets is also have certain ascend,the maximum lift of the cracking load reaching 2.17 times and the maximum increase of ultimate load reaching 1.44 times.The smaller the mesh of steel wire mesh size,the better the lifting effect.On the basis of experimental research,considering the constraint effect of different sizes of steel wire mesh on concrete,the recommended formula for calculating the bending bearing capacity of composite steel wire mesh concrete sheets was deduced.

关 键 词：钢丝网 混凝土薄板 抗裂性能 受弯承载力 

分 类 号：TU375[建筑科学—结构工程]