Seismic performance of novel PEC column-steel beam interior joint with partial post-tensioned BRS energy-dissipation connection
1.Jiangsu Key Laboratory of Structure Engineering, University of Science and Technology of Suzhou, Suzhou, Jiangsu 215011, China; 2.Suzhou Zhonggu Building Technology Co., Ltd., Suzhou, Jiangsu 215009, China
Abstract：To investigate seismic performance of the interior joint of novel PEC column-steel beam with partial post-tensioned BRS energy-dissipation connection, column layout was taken into consideration to design 2 large size specimens, and the tests were conducted under quasi-static cyclic lateral loading. The results show that the post-tensioned bars can provide restoring force to reduce residual drift with mitigated structural damage process, while BRS energy-dissipation plates can be used to dissipate earthquake energy with reduced structural response. The stiffness distribution of column-beam is determined by PEC column layout to affect the mechanical process of connection and the damage pattern of the specimens. The force-transfer mechanism of concrete equivalent strut in the panel zone is formed by pre-tensioned penetrating bolts and post-tensioned bars, which correspondingly alleviates shear demand of steel web. All residual rotations of specimens are less than 0.005 rad when interstory drift reaches the limit of 0.020 rad of frame structure at design basis earthquake level. All residual rotations of specimens are still less than 0.010 rad when interstory drift is more than the limit of 0.035 rad of frame structure at maximum earthquake level.
2015, Vol. 36 
