【摘要】 基于不同的数值方法进行混凝土结构倒塌分析时,其分析模型实质为一多体系统,当结构进入大变形大位移阶段后,就可能发生多体碰撞问题。基于LS-DYNA有限元程序研究了三混凝土立方块体不同碰撞模式下的宏观反应结果,并对比分析各结果之差别,同时分析了初始相对碰撞速度、块体质量等因素的影响。基于对比分析,提出混凝土块体多体碰撞问题的处理方法。更多还原

【Abstract】 In the collapse analysis of RC structures based on different numerical methods,the analytic models of structures actually are taken as a multi-body system.After the structures enter the stage of large deformation,the multi-body impact among concrete blocks or elements may occur.Based on LS-DYNA finite element program,the numerical tests of three-body impact among concrete blocks are carried out.Different impact patterns are analyzed and contrasted based on the results of numerical tests.And the influence of different impact parameters is studied.In addition,the method of processing multi-body impact is provided based on comparison and analysis.更多还原