【摘要】 利用非线性动力有限元方法,对预应力混凝土板和钢筋混凝土板在杆式动能弹冲击下的动力响应过程进行了数值模拟,对两类构件的冲击力学行为进行了力学分析和比较。研究表明,预应力对减轻反射拉伸波引起的层裂效应,克服加载面撞击影响边缘区域的拉应力,提高构件在整体变形过程中的抗裂性等方面均有一定的作用。更多还原

【Abstract】 With the nonlinear finite element method,simulations for the dynamic responses of prestressed concrete slab and reinforced concrete slab to impact of a long-rod projectile were processed. The mechanical behaviour of two slabs was analyzed and compared. The study shows that the pre-compression can have an influence on mitigating the scabbing effect produced by the reflected tensile waves and eliminating the tension stress on the edge range of impact zone of loading face as well as improving structural performance of anticracking in the whole deformation.更多还原