波折开孔板连接件基本力学性能试验

为了研究和开发钢与混凝土组合结构中的新型连接件,提出了一种新型连接件——波折开孔板连接件。进行了3个波折开孔板连接件推出试验和3个普通开孔板连接件推出试验,测试了这2种连接件的基本力学性能,对试验结果进行了比较和分析,得到了波折开孔板连接件的荷载-滑移关系,并拟合出在正常使用状态和极限承载力状态下的相对刚度表达式。试验结果表明：波折开孔板连接件具有优越的力学性能,其抗剪强度比普通开孔板连接件提高24%,其抗剪刚度比开孔板连接件也有较大提高,达到极限荷载时其延性为普通开孔板连接件的1.9倍。

Experiments on the Mechanical Properties of Corrugated Rib Connector

To research and develop a new type of connector for steel and concrete composite structure,a new type of connector,corrugated rib connector,was developed.Three push-out tests with corrugated rib connector and three push-out tests with perfobond rib connector were carried out.The basic mechanical properties of these connectors were measured and the test results were compared and analyzed.The load-slip relation of corrugated rib connector was obtained,and relative stiffness expressions under normal service state and ultimate bearing capacity state were fitted.The test result shows that the mechanical properties of this connector are excellent.The shear strength of corrugated rib connector is 24 percent greater than that of the perfobond rib connector,and the shear stiffness of corrugated rib connector is larger than that of the perfobond rib connector.Besides,the ductility of corrugated rib connector is 1.9 times higher than that of the perfobond rib connector when they reach the ultimate load.