School of Civil Engineering, Lanzhou University of Technology, Lanzhou, 730050, China.
School of Civil Engineering, TianJin University, Tianjin, 300072, China.
Sci Rep. 2023 Mar 18;13(1):4486. doi: 10.1038/s41598-023-31789-0.
For lightweight steel frame structures consisting of steel H-beams and cold-formed steel columns filled with concrete, seismic performance comparison tests and numerical simulation analyses were performed for bare and infilled frames. The effects of the lightweight wall panels, the axial compression ratio and the wall thickness of the steel sections of the columns on the seismic properties of the structure were investigated. The failure of the bare frame was concentrated in the weld fractures at the beam-column joints. When the wall panels were embedded in the frame, the damage was concentrated at the corners and edges of the wall panels and the connectors. The wall panels significantly improved the initial stiffness of the frame, early energy dissipation and resistance, and the wall panel energy dissipation rate was initially as great as 91%. As the axial compression ratio increased, the resistance of the structure significantly decreased. Under monotonic loading, the resistance on the structure with an axial compression ratio of 0.4 was reduced by nearly 44% compared to the structure without axial compression. Increasing the wall thickness of the steel sections of the columns increased the load-bearing capacity of the structure, but the increase diminished with increasing wall thickness.
对于由钢 H 型钢和填充混凝土的冷弯型钢柱组成的轻型钢框架结构，对裸框架和填充框架进行了抗震性能对比试验和数值模拟分析。研究了轻型墙板、柱截面的轴压比和壁厚对结构抗震性能的影响。裸框架的破坏集中在梁柱节点的焊缝断裂处。当墙板嵌入框架时，损坏集中在墙板和连接件的角和边缘处。墙板显著提高了框架的初始刚度、早期耗能和阻力，墙板的耗能率最初高达 91%。随着轴压比的增加，结构的阻力显著降低。在单调加载下，与无轴压的结构相比，轴压比为 0.4 的结构的阻力降低了近 44%。增加柱截面的壁厚会增加结构的承载能力，但随着壁厚的增加，增加幅度会减小。
