混凝土块体碰撞过程中的动能损耗  

Kinetic Energy Loss in Impact Action Between Concrete Blocks

作　　者：侯健[1] 顾祥林[1] 林峰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《同济大学学报（自然科学版）》2008年第7期880-884,共5页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金重大研究计划面上资助项目(90715004);国家自然科学基金资助项目(50578116)

摘　　要：分析了混凝土块体碰撞过程中动能的损耗机理以及在结构倒塌分析中考虑混凝土块体碰撞的基本方法.推导了相关文献中定义的碰撞恢复因数与动能损耗系数间的对应关系.基于根据试验和数值模拟相结合的方法提出的碰撞力学模型,研究了碰撞恢复因数和动能损耗系数的定量确定方法.方法中考虑了质量比、初始碰撞夹角、混凝土抗压强度和块体初始碰撞速度比等因素对混凝土块体碰撞性能的影响,为建立更精确的混凝土块体间的碰撞模型提供了依据.The paper presents an analysis of the mechanism of kinetic loss in impact action between concrete blocks, and also the basic method by taking the impact into account when analyzing the structure collapse response. The correlation between the factor of restitution in impact and the factor of kinetic energy loss defined in corresponding references is deduced. Based on the proposed impact model derived from the test and the numerical simulation results, a study is made of an objective determining method of the factor of restitution in impact and the factor of kinetic energy loss. The mass ratio, the initial impact angle, the compressive strength of concrete and the initial impact velocity ratio of concrete blocks are considered in the method, which is the basis for developing a more precise impact model.

关 键 词：混凝土块体 碰撞恢复因数 动能损耗系数 

分 类 号：TU375[建筑科学—结构工程]