摘要
装配式钢结构具有施工快、工期短、污染小的优点。基于此,提出一种由方钢管柱、H型钢梁、保险丝、高强螺栓和现浇楼板组成的可恢复功能装配式钢框架梁柱节点,并变换保险丝处梁间缝隙宽度、保险丝长细比和保险丝屈服强度三个参数,共建立了13个有限元模型进行分析。研究结果表明:保险丝能够实现损伤控制,保护主体结构免受损伤;保险丝处梁间缝隙宽度大于5mm时,可以保证梁段不发生碰撞,损伤集中在保险丝处,工程应用中建议采用10mm的缝隙宽度;保险丝长细比为43时,能够保证可恢复功能装配式钢框架梁柱节点具有足够的承载能力;当主体结构选用Q345B钢材时,保险丝宜采用Q235B钢材,以实现保险丝的损伤控制。
The fabricated steel structure has the advantages of fast construction,short construction period and little pollution.Based on this,a beam⁃column joint in prefabricated steel frame with reconfigurable function was proposed,which was composed of square steel pipe column,H⁃shaped steel beam,fuse,high⁃strength bolt and cast⁃in⁃place floor,and 13 finite element models were established to analyze the three parameters,namely the gap width between the beams at the fuse,fuse slenderness ratio and fuse yield strength.The results show that the fuse can realize damage control and protect the main structure from damage;When the gap width between the beams at the fuse is greater than 5mm,it can ensure that the beam section does not collide,and the damage is concentrated at the fuse.It is recommended to use a gap width of 10mm in engineering applications.When the fuses slenderness ratio is 43,it can ensure that the beam⁃column joint in prefabricated steel frame with reconfigurable function have sufficient bearing capacity and can realize the damage control of fuses.When Q345B steel is selected for the main structure,Q235B steel should be used for the fuse to achieve damage control of the fuse.
作者
王敬贺
罗云标
WANG Jinghe;LUO Yunbiao(School of Civil Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Coast Civil Structure Safety of Ministry of Education,Tianjin University,Tianjin 300072,China)
出处
《建筑结构》
北大核心
2024年第3期95-102,共8页
Building Structure
基金
中国地震局工程力学研究所基本科研业务费专项(2019EEEVL0302)。
关键词
钢框架
可恢复功能
梁柱节点
保险丝
损伤控制
装配式结构
steel frame
reconfigurable function
beam⁃column joint
fuse
damage control
prefabricated structure
