新型穿心暗牛腿钢管混凝土柱节点试验及分析  

Experiments and Analyses of a New CFST Connection with Steel Brackets Through Tubular Core

作　　者：季静[1] 吴爱明[1] 王燕珺[1] 韩小雷[1] 

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2008年第3期114-120,共7页Journal of South China University of Technology(Natural Science Edition)

摘　　要：提出了一种取消环梁仅带环筋的穿心暗牛腿钢管混凝土柱节点型式,该类节点外形与普通钢筋混凝土梁柱节点类似,且能很好地满足建筑及装饰设计要求.文中首先通过对中节点与边节点的试验研究,验证了板放射筋和环筋具有较理想的控制裂缝的能力以及螺纹套筒连接主筋在往复荷载作用下的实际工作性能满足抗震设计要求,并分析了该节点型式的变形、应变、裂缝开展、破坏形态及最终承载能力.然后基于试验结果,应用有限元程序对试件进行非线性模拟,进一步分析了此节点的受力机理.This paper presents a new kind of concrete-filled steel tube （CFST） connection with steel ring and steel brackets through tubular core, which is of the shape similar to the common reinforced concrete beam-column joint and meets the demand of architectural design well. The interior and the side connections are then experimentally investigated. The results prove that the ring steel bar and radial steel bar in slab can well control the crack development of connection, and that the working behavior of the longitudinal bar connected with screwed cannula in the beam under reciprocating load meets the demand of seismic design well. The deformation, strain, crack development, failure mechanism and ultimate bearing capacity of the presented CFST connection are also analyzed in this paper, and a nonlinear FEA simulation is finally carried out, the results further revealing the mechanics of the connection.

关 键 词：钢管混凝土柱节点 环筋 变形 承载能力 有限元分析 

分 类 号：TU375[建筑科学—结构工程]