FUNDAMENTAL STUDY OF STRUCTURAL FRACTURE BY IMPACT LOADS

结构的冲击特性取决于结构刚度的快速变化和外部载荷的冲击。本研究澄清为以下项目。(1)建立了求解背倾等刚度快速变化的高层建筑局部应力分布的简化理论；(2)查明产生巨大垂直加速度的原因和波形；(3)外荷载作用与恒载作用相互作用的解释；(4)相邻建筑之间的冲击效应和冲击损害的减少；(5)澄清受冲击载荷的梁和板。

The impact features of structures depend on the rapid variation for structural stiffnesses and the impulse of external loads. This study clarified as the following items. (1) formulation of a simplified theory which is solvable the local stress distribution of high-rise buildings with rapid variation of stiffness such as a setback ;(2) finding out the cause of the astonishing magnitude of vertical acceleration and the wave form ;(3) explication of interaction between the effect due to external loads and the dead loads ;(4) impact effect of pounding between adjacent buildings and the reduction of pounding damages ; and (5) clarification of beams and plates subjected to impact loads.