FRCC框架梁裂缝性能试验研究  

Experimental study on crack performance of FRCC frame beam

作　　者：姚山 杨忠平[1] 葛文杰 Yao Shan;Yang Zhongping;Ge Wenjie(Gansu Engineering Design&Research Institute Limited Liability Company,Gansu Lanzhou 130030,China;Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education,Southeast University,Nanjing 210096,China;College of Civil Science and Engineering Yangzhou University,Yangzhou 225127,China)

机构地区：[1]甘肃省工程设计研究院有限责任公司,甘肃兰州730030 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [3]扬州大学建筑科学与工程学院,江苏扬州225127

出　　处：《建筑科学》2021年第11期55-61,共7页Building Science

基　　金：甘肃省建设科技计划项目(JK2021-19)。

摘　　要：通过三分点弯曲试验,研究FRCC框架梁在弯曲荷载作用下的裂缝发展规律,并与RC框架梁进行对比,结果表明:加载至承载力极限状态,FRCC框架梁的受拉裂缝几乎贯穿了整个加载阶段,并在极限状态呈现出较多裂缝共同发展的破坏模式;RC框架梁表面不再有新裂缝产生,既有裂缝逐渐变宽增长并近乎贯通整个横断面。利用原理公式,引入应变修正系数γ_(s)和纤维影响系数γ_(f),得到FRCC框架梁裂缝宽度计算公式,就本文配制的FRCC而言,可以预测FRCC框架梁跨中正常使用极限荷载时的裂缝宽度。Through the three-point bending test, the development law of cracks under the bending load of FRCC frame beam is investigated and compared with RC frame beam. The results show that the tensile crack of FRCC frame beam almost runs through the whole loading stage, and presents a failure mode with more cracks developing together in the ultimate state. However, there are no new cracks on the surface of RC frame beams, the existing cracks gradually widen and grow in the post-loading period and almost penetrate the entire cross section. In favor of the principle formula, γ;and γ;are introduced to obtain the crack width calculation formula of FRCC frame beam, it can predict the crack width of FRCC frame beam under normal limit load in mid-span.

关 键 词：纤维增强水泥基复合材料 框架梁 裂缝 

分 类 号：TU378.4[建筑科学—结构工程]