FRP筋混凝土双向板冲切性能试验研究  

Punching experimental study on concrete slabs reinforced with BFRP bars

作　　者：张亚坤[1] 侯黎黎[1] 朱海堂[2] 

机构地区：[1]黄河水利职业技术学院,河南开封475003 [2]郑州大学,河南郑州450001

出　　处：《混凝土》2017年第11期54-57,62,共5页Concrete

基　　金：国家自然科学基金项目(50879082)

摘　　要：为了探讨加载位置、混凝土强度、玄武岩纤维增强塑料(BFRP)筋用量等因素对混凝土板冲切性能的影响规律,进行了七块BFRP筋混凝土方形板的冲切试验。结果表明:在相同荷载作用下,混凝土和BFRP筋的应变随着混凝土强度的提高及BFRP筋配筋数量的增多而逐渐减小,混凝土板开裂之后混凝土的应变增长速度加快;混凝土板的抗裂能力和冲切承载力受混凝土强度的影响较大,而受BFRP筋配筋配筋率的影响相对较小;集中荷载作用下BFRP筋混凝土方形板的破坏发生于混凝土板的局部位置,破坏类型为冲剪破坏,破坏前无显著征兆,破坏性质为脆性破坏。To investigate influence of loading position,strength of concrete and dosage of basalt fiber reinforced plastic bars on punching performance,it conducted seven pieces of BFRP reinforced concrete square plate punching test.Test results show that under the same load,the strain of concrete and BFRP bars decreased gradually with the increasing of BFRP and the number of reinforcement concrete strength,concrete slab cracking after concrete strain growth speed.The crack resistance and punching capacity of concrete slabs are greatly influenced by the strength of concrete,and the effect of reinforcement ratio of BFRP bar is relatively small.The failure of BFRP reinforced concrete square slab under concentrated load is a local impulse,and brittle failure is not obvious.

关 键 词：BFRP筋 混凝土板 冲切性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]