基于精细积分法的结构碰撞动力系数谱研究  

STUDY ON DYNAMIC COEFFICIENT SPECTRUM FOR STRUCTURE POUNDING BASED ON THE PRECISE TIME-INTEGRATION METHOD

作　　者：李青宁[1] 尹俊红[1] 张瑞杰[1] 韩春[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《工程力学》2016年第3期161-168,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(51078306);高等学校博士学科点专项科研基金项目(20106120110004)

摘　　要：将精细积分法引入结构碰撞问题研究中,并借鉴已有反应谱定义提出结构碰撞加速度动力系数谱的概念,采用精细积分法对相邻结构进行了Ⅰ类、Ⅱ类和Ⅲ类场地下碰撞加速度动力系数谱研究。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;不同场地类型的地震动输入下,结构的碰撞响应有差异,总体上II类场地结构碰撞力响应最大;结构碰撞力对初始间隙大小并不敏感,阻尼比的增加使结构的碰撞力响应降低。The precise time-integration method is introduced for a structural collision problem, then the concept for a dynamic coefficient spectrum is presented for structural pounding acceleration, based on the definition of a response spectrum. The precise time-integration method is adopted to study the dynamic coefficient spectrum for structural pounding acceleration under the condition of I site, II site and III site. The results show that the precise time-integration method for the structural collision analysis is accurate and efficient, and suitable for the structural collision problem. There is a different response between adjacent structural collisions in the case of ground motions with the different class sites. The impact force in II site is the largest in general. The impact force is not sensitive to initial gap, and it decreases with the increase of a damping ratio.

关 键 词：结构碰撞 精细积分法 动力系数反应谱 间隙 阻尼比 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]