集中荷载下FRP筋混凝土双向板的冲切受力性能  

PUNCHING BEHAVIOR OF CONCRETE TWO-WAY SLABS REINFORCED WITH FRP BARS UNDER CONCENTRATED LOADING

作　　者：张亚坤[1] 朱海堂[2] 侯黎黎[1] 

机构地区：[1]黄河水利职业技术学院水利系,河南开封475004 [2]郑州大学水利与环境学院,郑州450002

出　　处：《工业建筑》2012年第12期30-34,共5页Industrial Construction

基　　金：国家自然科学基金项目(50879082)

摘　　要：通过对7块中置和偏置集中荷载作用下纤维增强材料(FRP)筋混凝土双向板的受力试验,研究荷载位置、混凝土强度、FRP筋用量等因素对板冲切受力性能的影响。结果表明:集中荷载位置、混凝土强度、FRP筋配筋率是影响FRP筋混凝土双向板冲切受力性能的重要因素。随着混凝土强度的提高和FRP筋配筋率的增大,同等荷载水平下的混凝土和FRP筋应变逐渐减小,开裂后混凝土应变的增长逐渐加快;混凝土强度对板的抗裂荷载和极限冲切承载力影响较大,FRP筋配筋率的影响相对较小;FRP筋混凝土双向板在中置和偏置集中荷载作用下的破坏属于脆性的局部冲切破坏。The influence of concentrated load position, concrete strength and FRP bars ratio on punching performance of two-way slabs were investigated by the test of 7 concrete two-way slabs reinforced with FRP bars subjected to punching shear loading. The test results showed that concentrated load position, concrete strength and FRP bars ratio were the main factors influencing the punching shear performance of concrete two-way slabs reinforced with FRP bars. Along with the increase of concrete strength and FRP bars ratio, the strain of concrete and FRP bars decreased gradually in same loading level, but the increase rate expedited gradually after cracking. The influence of concrete strength on the cracking load and the ultimate punching capacity of the test slabs was larger than FRP bars ratio. The concrete two-way slabs reinforced with FRP bars under concentrated loading exhibited brittle local punching failure.

关 键 词：FRP筋 混凝土 双向板 冲切性能 

分 类 号：TU375.2[建筑科学—结构工程]