科研之友
微信
新浪微博
Facebook
分享链接
摘要
Curved steel-concrete-steel (CSCS) composite slabs can increase the compression range of concrete so as to give full play to the compressive strength of the concrete and the tensile strength of the steel plate. It has been used in high-rise buildings, nuclear reactor containment, Arctic caisson and oil storage tanks and other important building structures. According to the specifications, three CSCS composite slabs with different fittings were designed. Based on the nonlinear finite element program ANSYS/LS-DYNA, the damage modes, midpoint displacement, energy consumption, etc. of the composite slabs under the action of near field explosion were studied, and the energy consumption and damage mechanism of the three different slabswere compared. The midpoint displacement and pressure of the CSCS composite slab were extracted from the finite element simulations. The results of the midpoint displacement were compared with the existing field explosion test results, and the results of pressure were compared with the empirical formula, which verified the rationality and effectiveness of the finite element model. Taking the midpoint displacement of the backsteel plate as the index, the effects of the explosive quantity, concrete strength and steel plate thickness on the anti-explosion performance of the CSCScomposite slabswere analyzed. The results show that the curved slabs maintain good integrity under the action of near-field explosion, there is no concrete fragments dispersion phenomenon, and they still have a continuous bearing capacity. Meanwhile, they have a better anti-explosion performance than traditional planar steel-concrete-steel composite slabs. The connection performance of the overlapping studs is stronger than that of the discrete studs, but slightly weaker than that of the pair studs. Increasing the concrete strength can reduce the midpoint displacement but cannot improve the damage condition of the concrete. Increasing the thickness of the steel plate can significantly reduce the midpoint displacement of the steel plate and improve the anti-explosion ability of CSCS composite slabs. ? 2022, Editorial Staff of EXPLOSION AND SHOCK WAVES. All right reserved.
-
单位工业装备结构分析国家重点实验室; 合肥工业大学
