Experimental analysis of R/C cylindrical shell behavior under idealized boundary and loading conditions

钢筋混凝土(R/C)圆柱板通常用于工业厂房和储罐。钢筋混凝土圆柱板在横向分布外压力作用下具有较大的承载能力，对其在横向荷载作用下的受力性能进行了试验和数值分析。有报道称，数值分析与实验分析之间存在一定的差异。本文采用数值方法和试验结果相结合的方法，对钢筋混凝土圆柱板的结构性能进行了分析。在试验分析中，钢筋混凝土圆柱板是在与数值分析相同的构型下用钢模成形的无初始缺陷的试件。在加载试验中，钢筋混凝土板用钢珠铰链支承，达到滚柱支承的状态。在相同的…下在更多的加载条件下，通过上述数值分析，对其变形特性和承载性能进行了测试，并与数值结果进行了比较。在数值分析中，采用了基于退化壳单元和分层方法的有限元方法，分别考虑了混凝土和钢筋的非线性行为。从数值计算和试验结果两方面分析了钢筋混凝土圆柱板在侧压力作用下的承载性能。结果表明，实验结果与数值分析结果吻合较好，实验模型具有与数值分析相同的特点。此外，加固位置的不规则性也应作为缺陷加以考虑。这种不完美效应的细节分析较少。

Reinforced concrete (R/C) cylindrical panels are commonly used for industrial plants and storage tanks. R/C cylindrical panel shows large load carrying capacity under lateral distributed external pressure.R/C cylindrical panel under lateral load has been analyzed experimentally and numerically. It has been reported that there were some discrepancies between numerical analysis and experimental analysis. These causes depend on the initial geometric imperfections of the specimens and the inaccurate modeling of the supporting condition in experiment.In this paper, the structural behavior of R/C cylindrical panel is analyzed by a numerical approach as well as by experimental results.In experimental analyses, R/C cylindrical panels are made under the same configuration as the numerical analyses using the steel mold to form the specimens without initial imperfections. In the loading test, R/C panel is supported by the steel ball-hinges to obtain the roller supported condition. Under the same … More loading condition as the numerical analysis mentioned above, the deformation characteristics and the load carrying behaviors are measured and are compared with the numerical results. The distributed load is modeled by the equivalent uniform load applied by the whiffle tree system.In numerical analyses, the finite element method based on a degenerated shell element and a layered approach is adopted Nonlinear behaviors of concrete and reinforcements are taken into account individually. Then the load deflection behavior and the load carrying capacities are evaluatedFrom both numerical and experimental results, the load carrying behavior of R/C cylindrical panel is presented under an external lateral pressure. Then, it is concluded that both results show in good agreement and the experimental model represents the same characteristics as the numerical analysis. In addition, the irregularity of reinforcing position have to be taken into account as the imperfection. The detail of such imperfection effects have been analyzed Less