Experimental study on seismic and replaceability performance of bio-inspired hinge joint with mixed connection
Yuan Yujie1,2, Shi Yanli1,2, Wang Wenda1,2, Song Yongkang1
1.School of Civil and Hydrau-lic Engineering, Lanzhou Uni-versity of Technology, Lanzhou 730050, China 2.Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Techno-logy, Lanzhou 730050, China
Abstract:To enhance the seismic performance and replaceability of a prefabricated steel composite connection joint, this study proposes a new replaceable bio-inspired hinge joint. By installing energy-absorbing plates on the inner side of the flange, efficient repair and performance restoration of the joint can be achieved. To verify the performance of the joint, two specimens were designed, and six low-cycle reversed tests, including two seismic performance tests and four repair tests, were conducted. The effects of the factors, including thickness of the energy-absorbing plate, thickness of the web rib plate, and height of the corrugated plate, on the joint performance were carefully examined, and the strain development law of the replaceable bio-inspired hinge components was analyzed in detail. The test results show that the joint fails in ductile bending mode, with damage concentrated in the weakened area of the energy-absorbing plate, avoiding damage to other components and significantly improving replaceability.The bending capacity of the joint is primarily carried by the energy-absorbing plate, so its bearing capacity can be effectively improved by increasing the thickness of the energy-absorbing plate. After failure, the initial seismic performance of the joint can be fully restored by replacing the energy-absorbing plate, demonstrating excellent replaceability. After installing the corrugated plate, the hysteresis curve of the joint becomes fuller, and both the yield load and peak load increase by 85.34%. This indicated that the hysteresis performance and energy absorption capacity of the joint can be effectively improved through the corrugated plate, and its bearing capacity can be precisely controlled by adjusting the peak height. The joint exhibits a maximum ductility of 12.77, reflecting its excellent rotational performance. In addition, the tibial connections and femoral connections of the bio-inspired hinge remain elastic throughout the service period, while plastic strain of the energy-absorbing plate is primarily concentrated in the weakened part of the cross-section. The research results reveal that the proposed replaceable bio-inspired hinge can effectively achieve the comprehensive improvement in both the seismic performance and replaceability of the steel composite connection.
袁玉杰, 史艳莉, 王文达, 宋永康. 混合连接仿生铰节点抗震与可更换性能试验研究[J]. 土木工程学报, 2026, 59(11): 18-37.
Yuan Yujie, Shi Yanli, Wang Wenda, Song Yongkang. Experimental study on seismic and replaceability performance of bio-inspired hinge joint with mixed connection. 土木工程学报, 2026, 59(11): 18-37.
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