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夹层钢管混凝土(CFDST)在桥梁和建筑的建设中具有很大的潜能。轴力和循环加载的弯曲荷载作用下,弯矩曲率曲线(M-(?)),柱侧向荷载-侧移曲线(P-Δ)模型的研究信息非常有限。建立了一个力学模型,用于分析轴向恒荷载和循环加载的弯曲荷载作用下的CFDST梁-柱。预测的组合梁柱的循环反应性能与试验结果一致。基于这个理论模型,对组合梁柱有关弯矩曲率曲线(M-(?)),侧向荷载-侧移曲线(P-Δ)的性能进行了参数分析。最后,提出了计算弯矩曲率曲线(M-(?)),侧向荷载-侧移曲线(P-Δ)的简化模型。
Clad concrete filled steel tubular (CFDST) has great potential in the construction of bridges and buildings. Under the action of axial force and cyclic loading, the research information of moment curvature curve (M- (?)) And column lateral load-displacement curve (P-Δ) model is very limited. A mechanical model was established for the analysis of CFDST beam-columns under axial loading and cyclic loading. The predicted cyclic behavior of the composite beam and column is consistent with the experimental results. Based on this theoretical model, the parameters of moment-moment curve (M- (?)) And lateral load-displacement curve (P-Δ) of composite beam and column are analyzed. Finally, a simplified model for calculating moment curvature curve (M- (?)) And lateral load-side shift curve (P-Δ) is proposed.