摘要
为了研究高强混凝土梁的抗剪性能,设计了5根剪跨比为2.6的高强混凝土梁,在集中荷载作用下来观察试件的裂缝发展和破坏形态,根据试验结果来分析不同混凝土强度和配箍率对抗剪性能和承载力的影响,并将实测承载力与我国《混凝土结构设计规范》(GB 50010—2010)和美国规范(ACI 318—11)进行对比。结果表明:高强混凝土梁的破坏形态与普通混凝土梁相似,配箍率的提高可以增加梁的承载力和延性;剪跨比为2.6的高强混凝土(C100)梁的承载力总体能满足我国规范,美国规范的安全储备高于我国规范。
In order to study the shear behavior of high- strength concrete beams,five high- strength concrete beams with the shear span ratio of 2. 6 are designed. The failure mode and crack development of the beams could be observed,the effect of beams with different concrete strength and reinforcement rate on shear strength and bearing capacity is analyzed according to the test results. The relevant results are compared with that in China＇s Code for Design of Concrete Structures（ GB 50010—2010） and American Standard（ ACI 318—11）. The research shows that the failure mode of high-strength concrete beam is close to that of ordinary concrete beam,and the loadcarrying capacity and ductility of beam would increase with the increase of stirrup ratio. Besides,the high-strength concrete beams（ such as C100） with shear span ratio of 2. 6 could meet the standard in our country in general and the safety factor in American specification is higher than that in China.
出处
《建筑科学》
CSCD
北大核心
2016年第9期80-84,共5页
Building Science
关键词
高强混凝土
受剪承载力
配箍率
high-strength concrete
shear capacity
stirrup ratio
