摘要
基于一个典型的焊接钢框架子结构抗连续倒塌试验,验证抗连续倒塌分析准确性。提出半跨梁简化分析模型,研究损伤断裂参数的影响。提出一种新型抗弯折板构造提升焊接钢框架抗连续倒塌性能的方法,得出抗弯折板的工作机制及计算方法。数值模拟验证了抗弯折板构造的合理性,分析关键参数影响。研究结果表明:损伤断裂参数的改变会影响荷载峰值点的位置;折板角度与折板厚度的增大,峰值点荷载及其对应位移会减小;增加抗弯折板能有效提高焊接钢框架的抗连续倒塌性能,避免失效模式过早产生。
Based on a typical progressive collapse test of a substructure with a welded steel frame,the analytical model was verified accurately.A simplified analytical model for half⁃span beams was obtained and effect of damage fracture parameters was investigated on the model.A new construction method of bending⁃resistant plate which can enhance the progressive collapse resistance of welded steel frames was proposed.The working mechanism and calculation method of the bending⁃resistant plate against continuous collapse in steel frames was derived.Numerical simulations were used to verify the reasonability of configuration and analyze the influence of key parameters.The results show that the position of load peak point is affected by the change of damage fracture parameters.When the angle of the bending⁃resistant plates and the thickness of the bending⁃resistant plates increase,the peak point load and corresponding displacement will decrease.Based on the above study,the progressive collapse resistance of welded steel frames can be effectively improved by adding bending⁃resistant plates,at the same time,premature failure mode can be avoided.
作者
王昊宇
王冬花
李雨桐
Wang Hao-yu;Wang Dong-hua;Li Yu-tong(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;Prefabricated Building Research Institute of Anhui Province,Hefei 230601,China)
出处
《工程抗震与加固改造》
北大核心
2025年第4期46-55,共10页
Earthquake Resistant Engineering and Retrofitting
基金
安徽省高校省级自然科学研究项目(KJ2021A0607)
安徽省住房城乡建设科学技术计划项目(2020-YF33)
安徽建筑大学博士启动基金项目(2020QDZ17)
安徽省装配式建筑研究院主任基金(AHZPY2022ZR01)。
关键词
钢框架
损伤断裂
连续倒塌
数值模拟
抗弯折板
steel frame
damage fracture
progressive collapse
numerical simulation
bending⁃resistant plate
作者简介
王昊宇(1999-),男,在读研究生,主要从事钢结构抗连续倒塌方面的研究;通讯作者:王冬花(1984-),女,博士,副教授,主要从事钢结构与组合结构、装配式混凝土结构方面的研究。
