爆炸荷载作用下曲面钢-混凝土钢组合板的动态响应研究

Study on the Dynamic Response of Curved Steel-concrete-steel Composite Plate under Blast Loading

为探究钢-混凝土-钢组合板(组合板)的抗爆性能,设计四种不同曲率的组合板;利用有限元软件ABAQUS对比研究这四种组合板在爆炸荷载作用下的损伤、位移和能量耗散情况。同时,以曲率为0.75的组合板为例,参数化分析了炸高、炸药量、钢板厚度、混凝土厚度、栓钉间距和直径对其动态响应的影响。研究表明:在相同爆炸作用下,组合板的最大动能和最大跨中位移均随着曲率增大而减小。当内外层钢板总厚度不变时,适度增大内层钢板厚度更有利于降低组合板的最大跨中位移。适度增加组合板的曲率,适度减小栓钉间距或增大栓钉直径均有利于提高组合板的抗爆性。根据非线性回归拟合得到了组合板的最大跨中位移与钢板厚度(或混凝土厚度)和炸药量的两种经验公式。

Four curved steel-concrete-steel composite plates(CSCSCPs)with different curvatures were designed to investigate the explosion resistance,and the damage,displacement and energy dissipation of the CSCSCPs under blast loading were studied by using the finite element software ABAQUS.Moreover,taking the CSCSCP with curvature of 0.75 as an example,parametric study was carried out to investigate the effect of blasting distance,charge mass,steel plate thickness,concrete thickness,stud spacing and its diameter on the dynamic response of the CSCSCP.The results show that under the same blast loading,the maximum kinetic energy and maximum mid-span displacement of the CSCSCP decrease as the curvature increases.When the total thickness of the inner and outer steel plates remains unchanged,moderately increasing the thickness of the inner steel plate is more conducive to reduce the maximum mid-span displacement of the CSCSCP.Appropriately increasing the curvature of the CSCSCP,reducing the stud spacing and increasing the stud diameter are helpful to improve the explosion resistance of the CSCSCP.Two empirical formulas of mid-span maximum displacement,steel plate’s thickness(concrete’s thickness)and explosion charges of the composite plate are obtained according to nonlinear regression.