新型翼缘型开孔折板剪力键抗剪性能试验

Experimental Study on Shearing Behavior of Perforated Table-Flap Shear Connector

在传统Twin-PBL键和翼缘型开孔波折板抗剪连接件基础上研究一种新型抗剪连接件-新型翼缘型开孔折板剪力键,对8组共24个剪力键做抗剪承载力推出试验,研究折板间距对承载力影响,并将新型翼缘型开孔折板剪力键与相应Twin-PBL对比。结果表明:折板间距对承载力影响较大,间距20 cm的剪力键承载力最大,比相应间距25 cm的增加8.76%,比相应间距30 cm的增加11.24%;新型折板剪力键抗剪切性能明显高于相应结构尺寸的直板剪力键,最高增加92.1%。说明该新型翼缘型开孔折板剪力键具有承载力高、抗疲劳性能好、加工制作方便、不易发生突然破坏、安全性能好等特点。

A new type of perforated aerofoil table-flap shear connector was studied in this paper based on Twin- PBL and perforated aerofoil under-table-flap shear connectors. The ultimate bearing capacity push-out tests of 24 perforated aerofoil table-flap shear connectors composed of 8 different groups were explored, and subsequently the space between the push-out armor plate was analyzed to compare with the performance of the S-PBL. The result indicates that the ultimate bearing capacity reaches the maximum when the space between the table-flap is 20cm, increasing by $.76% for 25cm and increasing by 11.24% for 30cm; the capability of the new type of shear connec- tors is superior to vertical- plate with the maximum increment achieving 92.1%. Hence, the new perforated aero- foil table-flap shear connector has many advanced properties such as greater carrying capacity, better capability of resisting fatigue, more convenience in being fractured, being uneasy to be demolished abruptly and more security as well.