中等剪跨比高强钢筋活性粉末混凝土无腹筋梁抗剪性能试验研究  

EXPERIMENTAL RESEARCH ON SHEAR PERFORMANCE OF HIGH STRENGTH REBAR RPC BEAMS WITHOUT STIRRUPS UNDER MODERATE SHEAR SPAN RATIO

作　　者：张猛[1] 金凌志[2] 

机构地区：[1]桂林理工大学基建后勤处,广西桂林541006 [2]广西岩土力学与工程重点实验室,桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《工业建筑》2016年第11期69-73,共5页Industrial Construction

基　　金：国家自然科学基金项目(51368013);广西重点实验基金资助项目(11-CX-04)

摘　　要：为了探究剪跨比对高强钢筋活性粉末混凝土(RPC)梁抗剪性能的影响,对中等剪跨比条件下,3根HRB500级钢筋活性粉末混凝土无腹筋简支梁进行抗剪性能试验研究,分析不同剪跨比对高强钢筋RPC梁受剪破坏形态、斜裂缝宽度、开裂荷载与极限荷载的影响。通过研究得出:高强钢筋RPC梁比普通混凝土梁传递剪力的能力和延性显著增强;临界斜裂缝倾角大小随剪跨比的增大而减小;开裂荷载与剪跨比大小无比例关系,极限荷载随剪跨比的增大而减小;基于桁架-拱模型无腹筋梁的抗剪承载力计算式,比较适用于高强钢筋RPC无腹筋梁抗剪承载力的计算。In order to explore the influence of shear span ratio on the shear behavior of high strength rebar reactive powder concrete（ RPC） beams,3 HRB500 rebar RPC beams without stirrups were designed to study their shear performance under moderate shear span ratio,analyzing the effect of different shear span ratio on their shear performance,including shear failure pattern,diagonal crack width,cracking load and ultimate load. Through the experimental research,the following conclusions were obtained： compared to ordinary concrete beams,the shear resistance and ductility of high strength rebar RPC beams were significantly enhanced and the critical size of inclined crack angle decreased with the increase of shear span ratio; there was no necessary correlation between cracking load and shear span ratio,and ultimate load decreased with the increase of shear span ratio; the shear capacity formula of concrete beams without stirrups,which was proposed based on the truss-arch model was more suitable for shear bearing capacity calculation of high strength rebar RPC beams without stirrups.

关 键 词：活性粉末混凝土 中等剪跨比 抗剪性能 桁架-拱模型 

分 类 号：TU375.1[建筑科学—结构工程]