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介绍了3个钢筋混凝土梁-钢管混凝土组合柱节点试件在梁端竖向往复荷载作用下的试验研究,其中一个为梁弯曲破坏的“强核芯区弱梁”试件,两个为核芯区剪切破坏的“强梁弱核芯区”试件。试验结果表明,三个试件都有大的变形能力,但峰值荷载时弱核芯区试件的核芯区剪切变形占节点总变形的50%以上,而强核芯区试件的这一比例很小;弱核芯区试件核芯区的箍筋和钢管屈服,而强核芯区试件核芯区的箍筋和钢管未屈服;弱核芯区试件的耗能能力小于强核芯区试件的;对于核芯区破坏的试件,减小核芯区的箍筋间距,可以增大节点的耗能能力和减小核芯区的剪切变形。
The experimental research on three RC beams-CFST column joints subjected to vertical reciprocating loads at the beam ends is presented. One is the “strong core weak beam” test piece damaged by beam bending and two For the core area of the shear damage “strong beam weak core area ” specimen. The experimental results show that all three specimens have large deformation capacity. However, the shear deformation of the core zone in the weak core zone accounts for more than 50% of the total deformation of the joint at the peak load. However, A small proportion; weak core core area of the stirrups and steel yield, while the core area of the core area of the core area of the stirrups and steel tube did not yield; weak core area specimen energy consumption less than For the specimen with strong core region, for the specimen with damaged core region, reducing the stirrup spacing in the core region can increase the energy dissipation capacity of the node and reduce the shear deformation in the core region.