节点区柱钢管不全贯通式钢管混凝土柱－梁节点区的受压试验研究

节点区柱钢管不全贯通钢管混凝土柱－梁节点是一种新型的节点形式. 其主要特点是: 柱钢管在节点区不全贯通, 各层间钢管柱分离或者在梁通过处开孔, 保持楼层框架梁纵筋贯通节点, 由于柱钢管在节点区不连续而导致其轴向承载力的下降通过加大节点区截面并配置环形钢筋来加强. 本文对该种节点进行了9个试件的受压试验, 研究了梁通过处钢管开孔及各层间钢管柱分离两种型式的柱钢管不全贯通式节点的力学性能、包括轴压及偏压的受压破坏形态、开裂荷载、极限承载力、结构变形能力, 以及环梁钢筋、钢管及纵筋等部件的受力特性.

Experimental research on the concrete filled steel tubular column-beam joint with the column tube discontinuous in joint zone under compression

Concrete Filled Steel Tubular (CFST) column-beam joint with the column tube discontinuous in joint zone is a new type of joint form. The main feature of this joint is that the steel tube is discontinued in the joint zone, the column is separate in each floor or openings are cut on the column tube at the corresponding beam place, while the longitudinal steel bars of the beam are continued in this zone. The circular beam is used to enlarge the joint zone and the ring steel bars are used to strengthen the joint zone. Nine experiments on axial and eccentric compressive specimens were carried out, the mechanical performance of the two types of joints is researched, include the failure mode, crack load, ultimate capacity, deformation of the specimens, and the strain of the ring bars, the longitudinal bars, and the steel tube.