Seismic performance analysis and evaluation of steel-concrete composite novel joints
Zhitao Zheng,Wenbing Shen,Honggen Chen,Sheng Li,Chuang Li
Abstract
This study investigates the seismic performance of X, K, and Y type joints in a large museum atrium steel-concrete composite structure, under cyclic loading with axial compression ratios of 0.1, 0.2, and 0.3 using China State Construction Zhituo simulation software. The plastic damage characteristics of concrete, stress distribution of steel, and reinforcement cage in each joint during loading are systematically analyzed. Furthermore, the hysteresis behavior of the joints under cyclic loading is examined. The results indicate that with increasing axial compression ratio, the concrete damage in the beam and column core areas of the Y joint is more severe compared to the X and K joints. The steel components effectively limit the deformation of reinforcement in the core area of the joint, satisfying the "strong column weak beam" design principle. The hysteresis curves of all joints are full, with slow stiffness degradation. Meanwhile, the ductility coefficients of the joints decrease with increasing axial compression ratio, indicating weakened deformation capacity. However, the strength degradation coefficient and equivalent viscous damping coefficient increase with increasing loading displacement, demonstrating significant energy dissipation and exhibiting good seismic performance, meeting seismic requirements.
Key Words
axial compression ratio; China state construction Zhituo simulation analysis; cyclic loading; seismic performance; steel-concrete structures
Address
Zhitao Zheng — 1) 2nd Construction Co.,LTD Of China Construction 5th Engineering Bureau, Hefei Anhui, 230041, China; 3) Anhui University of Science and Technology, Huainan Anhui, 232001, China
Wenbing Shen — 1) 2nd Construction Co.,LTD Of China Construction 5th Engineering Bureau, Hefei Anhui, 230041, China; 2) China Construction Fifth Engineering Bureau Co., Ltd, Changsha Hunnan, 410000, China
Honggen Chen, Sheng Li, Chuang Li — China Construction Fifth Engineering Bureau Co., Ltd, Changsha Hunnan, 410000, China
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