集中荷载作用下拱形双钢板混凝土组合墙板的有限元分析

Finite element anlysis of curved steel-concrete-steel composite panels subjected to concentrated load

通过ANSYS/LS-DYNA平台对9个拱形双钢板混凝土组合墙板在集中荷载下的试验进行了有限元分析,对试件进行了精细化建模,有限元模型由锤头、上下钢板、混凝土、连接件和底板等部分组成。通过对比试验和有限元分析的力-位移曲线以及破坏特征,验证了有限元模型的准确性。通过该有限元模型分析了影响试件承载力的参数,主要包括混凝土厚度、钢板厚度、连接件间距、连接件直径和矢跨比,结果表明,钢板厚度为影响承载力的主要因素,连接件间距的减小和直径的增加可以提升试件的组合性能,合理的矢跨比应在1/4~1/3之间。

By using ANSYS/LS-DYNA, nine curved steel-concrete-steel(SCS) composite panels experiments subjected to concentrated load were analyzed by finite element(FE) models. The FE models of curved SCS composite panels were established, including the hammer, steel plates, concrete, shear connectors and end plate. The FE models were verified by comparing the load-displacement curves and failure characteristic between tests and numerical simulation. The parameters influencing the ultimate strength of curved SCS composite panels were analyzed including concrete thickness, steel plate thickness, spacing and diameter of shear connectors, and rise-span ratio. It turns out that steel plate thickness decides the ultimate strength of the curved SCS composite panels. The combination performance of specimens can be improved by decreasing the spacing and increasing the diameter of shear connectors. Meanwhile, the reasonable rise-span ratio is between 1/4 and 1/3.