Experimental study on seismic behavior of through-diaphragm bolted connection between concrete-filled steel tubular column and steel beam
Ye Quanxi1,2 Wang Yuanqing1 Ding Dayi3 Zhang Feng4 Lin Ying1
1. Tsinghua University, Beijing 100084, China; 2. Hebei University of Water Resources and Electric Engineering, Cangzhou 061001，China;
3. Wuzhou Engineering Design and Research Institute, Beijing 100053，China; 4. Shenzhen GSIN green building Co.,Ltd., Shenzhen 518117, China
Abstract：To resolve the problems related to the welding difficulties commonly encountered in traditional inner diaphragm joint, the excessive space occupancy of external diaphragm joint, the indoor convex corner caused by the large cross-section of the column, etc., two types of through-diaphragm bolted connections(TDBCs)with narrow cross-section between concrete-filled steel tubular column and steel beam were proposed, and the structure, design principle and loading process of the bolted connections were elaborated. Furthermore, two vertical and two horizontal through-diaphragm specimens in cruciform shape were designed for the monotonic and hysteretic loading tests. The results showed that the two types of TDBCs were simple in structure, convenient in construction and installation, and easy in concreting. Both types of TDBCs shall be of the semi-rigid type, and the loading processes can be divided into the elastic stage, sliding stage, elasto-plastic stage and failure stage. Additionally, both types of TDBCs are characterized by the excellent bearing capacity, appreciable ductility, stable and effective hysteretic performance and energy dissipation capacity.
