钢管混凝土柱-环扁梁中节点的理论分析

Theoretical analysis of concrete filled steel tubular column-reinforced ring flat beam interior joints

研究了钢管混凝土柱-钢筋混凝土环梁中节点(简称环梁节点)和钢管混凝土柱-钢筋混凝土环扁梁中节点(简称环扁梁节点)的内力传递机理,提出了环梁节点、环扁梁节点静载实验和低周反复荷载实验的节点受力模型,分析了静载实验和低周反复荷载实验节点受力模型的不同点.研究表明,在静载作用下,环梁、环扁梁节点计算截面有剪扭、拉弯和纯弯截面;在低周反复荷载作用下,环梁、环扁梁节点计算截面有剪扭、拉弯和纯扭截面.

The internal forces transferring mechanism of the concrete filled steel tubular column - reinforced concrete ring beam joints （namely ring beam joints） and the concrete filled steel tubular column - reinforced concrete ring flat beam joints （namely ring flat beam joints） was investicated. The force models of ring beam and ring flat beam joints were presented by static load tests and quasi - static cyclic lateral load tests, and the differences were analysed. The theoretical analysis and investigation show that under static loads, the calculation sections of ring beam joints and ring flat beam joints have shear and torsion sections, tensile and moment sections and pure moment sections; And under quasi - static cyclic lateral loads, the calculation sections of ring beam joints and ring flat beam joints have shear and torsion sections, tensile and moment sections and pure torsion sections.