| 引用本文: | 程欣,王宇航,袁加旺,郑礼刚.薄柔钢框架抗震性能试验[J].哈尔滨工业大学学报,2025,57(2):122.DOI:10.11918/202308025 |
| CHENG Xin,WANG Yuhang,YUAN Jiawang,ZHENG Ligang.Experimental study on seismic performance of slender steel frames[J].Journal of Harbin Institute of Technology,2025,57(2):122.DOI:10.11918/202308025 |
|
| 摘要: |
| 为实现钢结构住宅轻量化,采用大宽厚比钢构件组成的薄柔钢框架体系,通过合理的截面组配,实现体系的承载力与延性的平衡。为了研究薄柔钢框架体系的抗震性能,制作两个足尺薄柔钢框架,包括S1级、S3级和S4级截面宽厚比的构件,进行拟静力试验分析其破坏机制、滞回曲线、承载能力、延性和能量耗散能力等。结果表明:两个试件均以梁端和柱底区域局部屈曲变形为主要破坏模式,首次局部集中破坏出现在梁端,导致试件达到极限承载状态；在框架结构中关键位置屈曲变形的发生顺序和发展程度对框架的抗震性能有显著影响;薄柔钢框架结构在搭配不同截面宽厚比的构件下,可以在实现轻量化的同时仍有较高的延性和塑性耗能能力。最后,基于试验结果采用ABAQUS软件建立试件的有限元模型并进行参数分析,得到了在不同截面组配下模型的破坏机制及对应屈曲截面的内力变化。 |
| 关键词: 薄柔钢框架 局部屈曲破坏 破坏机制 拟静力试验 有限元分析 |
| DOI：10.11918/202308025 |
| 分类号:TU391 |
| 文献标识码:A |
| 基金项目:国家自然科学基金面上项目(51978437)；中国博士后科学基金(2021M692862) |
|
| Experimental study on seismic performance of slender steel frames |
|
CHENG Xin1,WANG Yuhang1,YUAN Jiawang1,ZHENG Ligang2
|
|
（1.College of Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China; 2.Shanxi Xiaohe Construction Industry Co., Ltd., Taiyuan 030009, China)
|
| Abstract: |
| A slender steel frame system composed of steel members with a high width-to-thickness ratio was adopted to achieve lightweight steel residential structures. By carefully selecting the section configuration the system achieves a balance between load-carrying capacity and ductility. To study the seismic performance of the slender steel frame system, two full-scale frames are constructed. These frames include members with S1, S3 and S4 configurations, varying in their cross-section width-to-thickness ratios. The frames are subjected to cyclic tests to analyze their failure mechanisms, hysteresis curves, load-carrying capacity, ductility, and energy dissipation capacity. The test results indicate that both specimens were mainly damaged by local buckling deformation at the beam end and column bottom region, with the initial concentrated damage occurring at the beam ends, leading to the specimens reaching their ultimate bearing capacity state. In addition, the sequence and degree of buckling deformation significantly influence the seismic performance of the frames. The slender steel frame structure, when combined with components of different width-to-thickness ratios, can achieve lightweight design while maintaining satisfactory ductility and plastic energy dissipation capacity. Finally, based on the experimental results, finite element models of the specimens were established using ABAQUS. Parametric analysis was conducted to determine the failure mechanisms and corresponding internal force variations of the buckling sections under different section configurations. |
| Key words: slender steel frame local buckling failure mechanism cyclic test finite element analysis |
