摘要
交叉钢管混凝土柱是一种新型的组合构件,其独特的“X”形使得结构受到的荷载可以通过左右两肢钢管混凝土的轴力来承担,可充分发挥钢管混凝土轴压强度高的优势,在高层建筑中具有较好的应用前景。交叉钢管混凝土在交叉节点区域截面减小,导致该区域刚度和承载力降低,形成薄弱部位,有必要对交叉钢管混凝土的交叉节点区域进行加强。本文对交叉钢管混凝土的节点部位的受力性能开展理论研究,首先提出交叉节点的加强方法,包括矩形连接板、环向加强板、衬管以及加劲肋;基于加强后节点的刚度以及承载力,提出加强型节点的设计方法,包括加劲肋数量、矩形连接板厚度以及节点区域截面承载力的计算方法;并通过试验,验证了交叉钢管混凝土加强型节点的可靠性及其设计方法的准确性。
Concrete-filled steel tube(CFST)X-columns are novel composite structural members that exploit the high compressive strength of CFST and have good prospects for use in high-rise buildings,because their unique"X"shape allows the structural load to be carried by the axial forces of the left and right CFST limbs.The reduction in cross section in the CFST X-column results in lowering in stiffness and load bearing capacity,creating a weaker joint part,thus,it is necessary to reinforce the joint part.In this paper,a theoretical study on the mechanical behaviours of the joint part of CFST X-column is carried out.Firstly,a reinforced method of the joint is proposed,including rectangular connection plate,circumferential reinforcement plate,liner tube,and stiffening ribs.Then,a design approach of each reinforcing component put forward based on the stiffness and strength of the reinforced joint,proposing the calculation method of the number of stiffening ribs,thickness of connection plate and the capacity of joint part.Finally,the reliability of the reinforced joint and the accuracy of its design method are validated by comparison with test results.
作者
陈泉
陈德劲
查晓雄
许培畅
凡友华
CHEN Quan;CHEN Dejin;ZHA Xiaoxiong;XU Peichang;FAN Youhua(Shenzhen Special Economic Zone Construction Engineering Group Co.,Ltd.,Shenzhen 518034,China;School of Civil Environment Engineering,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China;School of Science,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)
出处
《建筑结构》
北大核心
2023年第S02期1518-1522,共5页
Building Structure
基金
国家自然科学基金面上项目(52178129)。
