箱形钢柱螺栓连接节点试验研究  

Experimental Study of Box-Shaped Steel Column Bolted Connection

作　　者：张艳霞 侯兆新[2] 张爱林 程梦瑶 Yanxia Zhang;Zhaoxin Hou;Ailin Zhang;Mengyao Cheng(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]中冶建筑研究总院有限公司,北京100088

出　　处：《钢结构（中英文）》2021年第1期34-49,共16页Steel Construction（Chinese & English）

基　　金：“十三五”国家重点研发计划项目(2017YFC0703806);国家自然科学基金面上项目(51778036);北京建筑大学北京未来城市设计高精尖创新中心项目(UDC2019033124);住房和城乡建设部科学技术计划项目(2017-K9-033)。

摘　　要：以2013年全国建设工作会议为标志,国家及地方政府连续发文积极推进装配式建筑发展。积极发展、采用装配式建筑尤其是装配式钢结构建筑,实现其标准化设计、工厂化生产、装配化施工,符合国家政策要求,同时也是建筑行业的大势所趋。箱型柱因其两个主轴方向抗弯刚度相等而被广泛应用于钢结构建筑中,目前箱型柱基本上采用全熔透焊接连接技术,然而该技术存在施工效率低、人工成本高、污染环境、焊接节点在地震下破坏严重和现场焊接耐久性差等诸多问题。基于上述亟待解决的关键问题,提出一种箱形钢柱螺栓连接节点。在该节点构造中,箱形钢柱上、下安装单元之间通过法兰板采用高强螺栓进行连接,为增强节点核心区性能,改善受力,在上、下单元关键位置处设置八边形芯筒。为保证芯筒和柱之间良好的协同工作性能,要求芯筒与柱壁之间间隙不超过2 mm,当加工精度不满足时,可采用两种措施进行补偿,即通过在芯筒和柱壁之间设置补偿板或增设自锁式单向螺栓来减少芯筒与柱壁之间的间隙,以保证芯筒和柱协同工作的性能。通过设计两个分别设置单向螺栓或补偿板的箱形钢柱螺栓连接节点,对其进行低周往复试验,进而研究箱形钢柱螺栓连接节点的受力性能并与传统全熔透焊接节点性能进行对比研究其刚性性能。试验结果表明:芯筒的设置能够提供一定的抗弯、抗剪承载力,在层间位移角为0.005 rad(1/200)时与柱壁接触从而发挥作用,使箱形钢柱螺栓连接节点受力性能更优;层间位移角在0.04 rad(1/25)及之前时,设置补偿板箱形钢柱螺栓连接节点与设置单向螺栓箱形钢柱螺栓连接节点的滞回性能及刚度退化趋势接近;层间位移角在0.05 rad(1/20)时,设置单向螺栓箱形钢柱螺栓连接节点滞回性能优于设置补偿板箱形钢柱螺栓连接节点;在整个加载过程中,�Since the 2013 National Construction Conference,state and local governments have issued a serious of documents to promote the development of prefabricated buildings.It conforms to the national policies and is also the trend of construction industry to actively develop and adopt prefabricated structures,especially prefabricated steel structure and to realize standardized design,factory production,and assembly construction.Box-shaped columns are widely used in steel structure buildings because of their equal bending stiffness in the two main axis directions.At present,box-shaped columns basically use fully-penetrated welded connection technology,which has many problems such as low construction efficiency,high labor costs,environmental pollution,severe damage upon earthquakes,and poor durability of on-site welding.Based on the above key problems to be solved,a box-shaped steel column bolted connection was proposed.In this connection,the upper and lower installation units of the box-shaped steel column are connected by flange plates with high-strength bolts.In order to enhance the performance and improve mechanical properties of the core area of the connection,a core tube is set at the key position of the upper and lower units.In order to ensure the good co-working performance of the core tube and column,it is required that the gap between the core tube and the column wall does not exceed 2 mm.When the machining accuracy is not satisfied,there are two measures to improve it.Compensation plate can be set between the core tube and the column wall,or blind bolts can be installed to reduce the gap between the core tube and the column wall to ensure the co-working performance.Two kinds of the bolted connections with blind bolts and compensation plates were designed and tested under low-cycle reciprocating loads to study the mechanical performance of the bolted connections,and to make contrast with that of the fully-penetrated welded connection to study the rigid connecting behavior of the bolted connection.The test result

关 键 词：箱形钢柱 螺栓连接节点 单向螺栓 补偿板 试验研究 

分 类 号：TU391[建筑科学—结构工程]