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。在侧向分布外压作用下，R/C圆柱板表现出较大的承载能力。对R/C圆柱板在侧向载荷作用下的受力特性进行了实验和数值分析。据报道，数值分析与实验分析之间存在一些差异。这些原因主要取决于试样的初始几何缺陷和试验中对支护条件的不准确建模。本文采用数值方法和试验结果对R/C圆柱板的结构性能进行了分析。在实验分析中，在与数值分析相同的配置下，使用钢模具制作R/C圆柱板，以形成无初始缺陷的试件。在加载试验中，R/C面板由钢球铰链支撑，得到滚柱支撑状态。在与上述数值分析相同的加载条件下，测量了其变形特性和承载性能，并与数值结果进行了比较。分布荷载是由惠弗勒树系统施加的等效均布荷载来建模的。在数值分析中，采用了基于退化壳单元和分层法的有限元方法，分别考虑了混凝土和钢筋的非线性行为。从数值和实验结果两方面分析了外侧压力作用下R/C圆柱板的承载特性。结果表明，两者吻合较好，实验模型与数值分析具有相同的特征。此外，补强位置的不规则性也必须作为缺陷加以考虑。对这种缺陷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