【摘要】 碰撞是导致结构地震破坏的重要原因之一,其与两碰撞结构的动力性能和地震作用密切相关,应给出与两个结构动力参数相关的反应谱,以指导结构考虑碰撞的抗震设计。本文给出相邻结构碰撞加速度反应谱定义,推导了精细积分法碰撞计算公式,进行了该反应谱曲面的分析和探讨。结果表明,精细积分法适用于结构碰撞问题的计算,可得到高精度的解,无条件稳定且可提高计算效率。碰撞会加大结构的加速度响应;动力特性相同的两相邻结构产生的响应有差异;增大阻尼比和相邻结构阻尼比差别、以及设置足够大的初始间隙,可有效降低结构的碰撞响应。更多还原

【Abstract】 Collision is one of the main reasons leading to damage of structures under earthquake excitation,it is closely related to structures’ dynamic characteristics and earthquake action. Response spectra for two adjacent impacting structures related to their dynamic parameters should be deduced to guide their aseismic design considering impact. Here,acceleration response spectra for impact between two adjacent structures were defined, the calculation formulas of pounding based on precise time-integration method were derived,and the response spectra were analyzed and discussed.The study results indicated that the precise time-integration method with high accuracy,unconditionally stable and improved efficiency is suitable for the computation of structural impact problems; acceleration responses of structures increase due to pounding,the responses of two adjacent structures with the same dynamic characteristics are different; to increase damping ratios of the two structures and the difference between the two ratios,and to set up enough large initial gap between the two structures can effectively reduce their impact responses.更多还原