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为分析高层建筑结构中钢-混凝土组合梁在罕遇地震作用下的非线性受力行为,该文采用截面分析法,并结合相关试验数据,得到了梁柱节点区组合梁的承载力及刚度计算公式,提出了考虑组合作用的钢-混凝土组合梁塑性铰滞回模型。分析表明,该滞回模型的计算结果与试验结果吻合良好,可以考虑组合梁在正负弯矩交替的情况下节点区混凝土翼板局部受力和钢筋的影响,物理概念清晰,计算也比较简单,能够为如何合理利用钢-混凝土组合梁的组合作用提供参考。
In order to analyze the nonlinear behavior of steel-concrete composite beams in high-rise buildings under rare earthquakes, this paper adopts the method of cross-section analysis and the relevant experimental data to obtain the bearing capacity and stiffness The formula of plastic hinge hysteresis model of steel-concrete composite beam considering the combined effect is proposed. The analysis shows that the calculated results of the hysteretic model are in good agreement with the experimental results, and the local force and reinforcement of the concrete slab in the joint area under the condition of positive and negative bending moments can be considered. The physical concept is clear, the calculation is relatively simple, Provide a reference for how to make rational use of the combined action of steel-concrete composite beams.