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本文通过对劲性钢筋混凝土(SRC)节点的试验分析,提出了内含有斜拉、斜压腹杆的刚架,在水平荷载作用下达到极限状态时,该刚架节点形成塑性铰,混凝土达到抗压极限强度而被压碎,成为可变体系导致节点破坏的 SRC 节点的受力模型。因此,通过试验与塑性极限分析,可建立起 SRC 节点抗剪强度的实用计算公式。经验证表明,该公式和试验结果较为吻合,且偏于安全。
In this paper, through the experimental analysis of the SRC joints, a rigid frame with diagonally drawn and bared web members is proposed. When the limit state is reached under horizontal loads, the rigid joints form plastic hinges and the concrete reaches resistance. The pressure limit strength is crushed and becomes a force model of the SRC node that causes the node destruction in the variable system. Therefore, a practical calculation formula for shear strength of SRC joints can be established through tests and plastic limit analysis. The verification shows that the formula and test results are more consistent and more secure.