BFRP筋混凝土无腹筋梁抗剪性能试验研究  

Experimental Study on Shear Resistance of BFRP Reinforced Concrete Beams without Stirrups

作　　者：张志金[1] 孙荣书[1] 刘华新[1] 李庆文 王学志[1] ZHANG Zhi-jin;SUN Rong-shu;LIU Hua-xin;LI Qing-wen;WANG Xue-zhi(School of Civil Engineering and Architecture,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,锦州121001

出　　处：《硅酸盐通报》2018年第10期3097-3102,共6页Bulletin of the Chinese Ceramic Society

基　　金：辽宁省自然科学基金(2015020208)

摘　　要：为研究骨料种类对BFRP筋混凝土梁抗剪性能的影响,以剪跨比和混凝土抗压强度为变量,完成了对称集中荷载作用下5根BFRP筋普通混凝土和5根再生混凝土无腹筋梁抗剪试验,并分析了试件裂缝发展、破坏形态及不同剪跨比和混凝土强度对构件跨中挠度、开裂荷载和极限荷载的影响,且参照相关规范对构件抗剪承载力进行计算分析。结果表明:再生混凝土梁的变形及裂缝发展形态与普通混凝土梁基本相似,再生混凝土梁的开裂荷载与极限荷载均低于普通混凝土梁;同一荷载对应的试件跨中挠度随剪跨比的增加而增大,混凝土抗压强度对试件跨中挠度无明显影响;试件开裂荷载与极限荷载均随着剪跨比的增大而减小,随着混凝土抗压强度的增大而增大;美国ACI 440. 1R-06规范对试验梁抗剪承载力的计算最合理。In order to investigate the influence of aggregate types on shear behavior of BFRP reinforced concrete beams.5 BFRP reinforced normal concrete beams without stirrups and 5 BFRP reinforced recycled concrete beams without stirrups subjected to concentrate loading were tested.Other main variables in the test were shear span ratio and concrete compression strength.The crack development and failure pattern were analyzed,and studying the influence of different shear span ratio and concrete compression strength on the deflection,cracking load and ultimate load.Refer to the relevant codes to calculate the shear bearing capacity of members.The test result shows the deflection and crack development of the recycled concrete beams are almost similar to those of the normal concrete beams,the cracking load and ultimate load of recycled concrete beams are lower than those of the normal concrete beam.The deflection of the specimens under the same load can be improved by the increase of shear span ratio,and the concrete compression strength of concrete has no obvious effect on the deflection of the specimens.The cracking load and ultimate load of specimens will be decreased with the increase of shear span ratio,while increased by the increase of compressive strength of concrete,the ACI 440.1R-06 code is the most reasonable to calculate the shear capacity of test beams.

关 键 词：BFRP筋 再生混凝土 挠度 破坏模式 抗剪承载力 

分 类 号：TB332[一般工业技术—材料科学与工程]