HUANG Zhi,YU Kechen,CHEN Junda,et al.Experimental Study and Optimization Analysis of Seismic Performance of Four‑limb Concrete‑filled Steel Tube Lattice Column‑box Girder Joints[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1368-1376.
HUANG Zhi,YU Kechen,CHEN Junda,et al.Experimental Study and Optimization Analysis of Seismic Performance of Four‑limb Concrete‑filled Steel Tube Lattice Column‑box Girder Joints[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(06):1368-1376. DOI: 10.13409/j.cnki.jdpme.20230701001.
Experimental Study and Optimization Analysis of Seismic Performance of Four‑limb Concrete‑filled Steel Tube Lattice Column‑box Girder Joints
In order to investigate the failure characteristics and plastic energy dissipation performance of four-limb concrete-filled steel tube (CFST) lattice column-box girder joints
low-cycle reciprocating load tests were conducted on three different CFST lattice column-box girder joints. Load-displacement hysteresis curves and skeleton curves were obtained from the tests. Based on the tests
finite element models of four-limb CFST lattice column-box girder joints were established using ABAQUS
and the results were compared and validated with the quasi-static test results
showing good agreement. Optimization designs were conducted for the core region of the joints with different configurations
and the influence of factors such as the symmetry of the core region and different configurations on the energy dissipation capacity were investigated. The results indicated that the joints with a transverse diaphragm in the core region exhibited the best plastic energy dissipation capacity. The greater the symmetry of the core region
the higher the plastic energy dissipation capacity of the joint. The configuration of the core region had a minor influence on the stiffness degradation of the joint. Joints with different core region configurations showed significant residual deformation
demonstrating good plastic performance. The research findings of the tests provide reference for the seismic performance analysis of the core region of four-limb CFST lattice column-box girder joints.
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