摘要
为了避免钢结构竖向构件的现场全熔透焊接,实现高效装配,提出一种装配式竖索自攻螺栓-芯筒法兰柱节点。基于装配式竖索自攻螺栓-芯筒法兰柱节点拟静力试验,利用ABAQUS有限元软件建立试验试件的有限元模型。在试验与有限元结果吻合较好的前提下通过4组模型进行参数化分析以探究自攻螺栓的个数及直径对节点的性能影响。结果表明:自攻螺栓个数及直径的增加均可以限制法兰连接处的变形,提高节点的抗弯承载力,相比较而言,增大自攻螺栓直径比增加自攻螺栓个数对节点力学性能的提升较大,在节点设计时可优先采用增大自攻螺栓直径的方式。装配式竖索-自攻螺栓芯筒法兰柱节点具有良好的力学性能,突破竖向构件无焊接连接的高效连接难题,能够实现了"强节点,弱构件"的抗震设计目标。
To avoid full penetration welding on site as well as implement efficient assembly of vertical components of steel structure, a prefabricated vertical short strand tapping high-strength bolt-core sleeve flange column connection was presented. Based on the pseudo-static test of prefabricated vertical short strand tapping high-strength bolt-core sleeve flange column connection, the ABAQUS finite element software was utilized to establish four models with different parameters to explore the mechanical properties of the connection under the premise that high agreement of results between the test and finite element analysis. The parametric analysis was mainly embodied in the number and diameter of tapping high strength bolt. The results show that the increase of the number and diameter of tapping high-strength bolts could effectively restrain the deformation of flange connection as well as enhance the lateral capacity to an extent.Compared with increasing the number of tapping high strength bolt, enlarging diameter is more evident in improving the mechanical properties of the connection. And hence, enlarging diameter of tapping high strength bolt should be given prior consideration when designing and applying the prefabricated vertical short strand tapping high-strength bolt-core sleeve flange column connection into actual engineering. Equipped with excellent mechanical properties, the prefabricated vertical short strand tapping high-strength bolt-core sleeve flange column connection not only overcome difficulty of no full penetration welding and efficient assembly of vertical members but also achieve the goal of seismic design of “strong connection weak connected member”.
作者
张艳霞
黄哲文
金博文
程梦瑶
ZHANG Yanxia;HUANG Zhewen;JIN Bowen;CHENG Mengyao(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《建筑结构》
CSCD
北大核心
2021年第S02期1222-1227,共6页
Building Structure
基金
国家自然科学基金项目(51778036)
北京市教委科研项目-科技计划重点项目(KZ201910016018)
住房和城乡建设部科学技术计划项目(2017-K9-033)
关键词
自攻螺栓
竖索
拟静力试验
芯筒法兰柱
数值模拟
tapping high strength bolt
vertical short strand
pseudo-static test
core sleeve flange column
numerical simulation
