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本文以轴压比为主要参数,进行了10个足尺外包钢混凝土平面框架内节点在反复荷载下的破坏性试验。对节点核心区开裂前的应力状态进行了有限元法计算和分析;对节点核心区的抗剪强度在试验、分析的基础上,按我国新颁布的《建筑结构设计统一标准》中的概率方法得出实用公式;此外,对影响节点延性性能的因素进行了定性分析。
In this paper, with the axial compression ratio as the main parameter, the destructive tests of 10 full-scale steel-framed concrete frame internal joints under repeated loads are carried out. The finite element method is used to calculate and analyze the stress state before the cracking of the core area of the node. The shear strength of the core area of the node is tested and analyzed, and the probabilistic method in the Unified Standard for the Design of Building Structures promulgated in China is adopted. A practical formula was derived; in addition, a qualitative analysis of the factors affecting the ductility performance of the nodes was performed.