基于RPC材料的PBL剪力键力学性能试验研究  

Experimental Study on Mechanical Performance of PBL Shear Connectors in Reactive Powder Concrete

作　　者：熊炫伟 经柏林 刘勇 刘路明 方志[1] XIONG Xuanwei;JING Bolin;LIU Yong;LIU Luming;FANG Zhi(College of Civil Engineering,Hunan University,Changsha,Hunan 410082,China;Hubei Jiayu Yangtze River Highway Bridge Co.,Ltd.,Xianning,Hubei 437200,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖北交投嘉鱼长江公路大桥有限公司,湖北咸宁437200

出　　处：《公路工程》2019年第6期240-245,共6页Highway Engineering

摘　　要：为深入研究基于活性粉末混凝土(Reactive Powder Concrete,简称RPC)材料的PBL剪力键的受力性能,确定其合理布置,以混凝土类型、PBL键层数为试验参数,对2类4组共8个插入式试件进行了推出试验。基于试验结果,分析了各试验参数对PBL剪力键力学性能的影响规律。结果表明:采用RPC浇筑的PBL试件较普通混凝土试件,极限承载力更高,极限滑移值更小。二层PBL试件单层平均极限承载力小于一层试件的极限承载力,试件S2-C-L250、S2-R-L250单层平均极限承载力较试件S1-C、S1-R分别减少10.3%、10.5%。In order to investigate the mechanical performance of Perfobond shear connectors in RPC(Reactive Powder Concrete)and determine the arrangements reasonably,push-out tests were conducted on eight specimens divided into two series and four groups including the test parameters of the concrete type and number of shear connectors.Based on the tests,the major factors affecting the behavior of PBL including the failure modes,ductility and bearing capacity were discussed.The results indicated that the ultimate capacity of PBL improved and the slip of ultimate capacity declined with RPC replacing normal concrete.Affected by the number of shear connectors,the average ultimate capacity of S2-C-L250,S2-R-L250 decreased 10.3%,10.5%,comparing with S1-C,S1-R.

关 键 词：PBL剪力键 RPC 承载能力 受力性能 试验研究 

分 类 号：TU3[建筑科学—结构工程]