Based on the use of a split column technology to solve the problem of short column, through the numerical simulation study on eight beam-column joints of reinforced concrete frame with split columns under high axial compression ratio and monotonous reverse loading, the failure mechanism of the joints core area under monotonic loading is analyzed here in detail. Furthermore, the influence of the split form of the columns up or below the joints and the length of the transition regions on the stress and strain fields in the joints core area is investigated, and the developing state of the cracks is also studied. All these as mentioned above could enrich the concrete frame joints'design theory, simultaneously they could also provide some references for the engineering practices of split column's frame joints.%在利用分体柱技术解决短柱问题的基础上,通过对高轴压比和单调反向荷载作用下8个钢筋混凝土分体柱节点模型的数值模拟研究,分析了单调荷载作用下节点核心区的破坏机理,研究了节点上下分体形式和过渡区长度对节点核心区应力应变场的影响,以及裂缝的发展状态.在丰富混凝土框架节点设计理论的同时,也对分体柱框架节点工程实践提供参考.
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