【摘要】 结构碰撞问题是影响其抗震性能的一个重要因素。利用精细积分法无条件稳定、精度高和受时间步长限制小的特点,将其用于结构碰撞问题的求解,并进行了公式推导;基于精细积分算法对相邻结构体系进行了碰撞力反应谱研究,考虑了碰撞刚度、初始间隙、阻尼比等参数变化对碰撞力的影响。结果表明,精细积分法用于结构的碰撞分析,计算精度和效率较高,对求解结构碰撞问题是适用的;对碰撞力反应谱分析表明,碰撞力峰值随碰撞刚度值的增大而增大,若使相邻结构的振动特性一致或具有足够大的相邻间隙,可最大限度地减小结构碰撞响应;短周期结构不易发生碰撞。更多还原

【Abstract】 Pounding is one of important factor affecting seismic performance of structure. In this paper,precise time- integration method which is unconditionally stable,high precision and less time step restruction was put in action to solve the pounding problem,then corresponding formula were derived. Pounding force response spectrum of adjacent structure systems was studied with precise time- integration method,and the influence of parameters,such as impact stiffness,the initial gap and damping ratio on the pounding force was considered. The results show that the precise integration method for structural analysis of the pounding is high accuracy and efficiency,and is suitable for the structural pounding problem. The pounding force response spectrum analysis shows that,peak pounding force increases with increase of pounding stiffness value. If the vibration characteristics of the adjacent structures are consistent or adjacent gap is large enough,the pounding response of the structures would reduced significantly; pounding is not easy to happen for structure with lower period.更多还原