- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Liping, WU Yi, YANG Chun, CAO Zhongming, LI Tianxian, CHEN Qingjun. Research on Seismic Performance of Precast Concrete Beam-Column Joints with Bolt-Plate Mechanical Connection[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250104
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To simplify the connection construction of precast concrete beam-column joints and improve construction efficiency, a precast beam-column joint with bolt-plate mechanical connection was proposed. The pseudo-static loading tests of seven specimens were carried out to analyze the effects of high-strength bolts, longitudinal reinforcement ratio of the beam, anchorage length and methods, as well as embedded steel plates on the enlarged head surface on the seismic performance of the joints. Results show that the joints exhibit excellent bearing capacity and ductility, with a reliable mechanical connection and a ductility coefficient of 3.79–5.69. The targets of plastic hinge failure at the beam end and the ductile design principle of “strong joint” can be achieved. When the anchorage length of longitudinal reinforcement of the beam is increased from 200 mm to 300 mm, the joint’s peak bearing capacity, ductility coefficient, and cumulative energy dissipation can be enhanced by 24.38%, 16.36%, and 38.08%, respectively. The peak bearing capacity and ductility coefficient of the joint with embedded steel plates on the enlarged end surface can be increased by 18.69% and 13.29%, respectively. While the reinforcement ratio of longitudinal reinforcement of the beam is increased from 0.75% to 1.18%, the failure mode of the specimen transfers from flexural-shear failure at the beam end to wedge-shaped failure at the enlarged head. The peak bearing capacity and cumulative energy dissipation can be improved by 20.65% and 20.30%, but the ductility coefficient decreases by 16.34%. Optimizing bolt edge distance and spacing, as well as enhancing the parameters including reinforcement along the beam direction on the enlarged head are recommended for subsequent research, thereby ensuring the rational formation of a plastic hinge at the beam end and ultimately achieving the ductile design principle of “strong joint”.
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