摘要
基于离散单元法,建立了混凝土框架结构在强震作用下的倒塌分析模型。其中,对于单元形状采用基于截面层次的长方体杆段模型（梁柱截面为矩形）,各单元通过虚拟的空间弹簧组相连接,通过基于物理和数值试验结果得到的混凝土块体碰撞力学模型,考虑了大变形阶段各单元间的碰撞作用。并基于VC＋＋语言编制了计算机仿真程序,模拟了强震作用下混凝土框架结构的倒塌反应,模拟结果与振动台试验结果比较,吻合较好。
A system for simulating the collapse behavior of the reinforced concrete framework due to seismic loading is developed.The numerical analysis is based on the distinct element method.The element type is selected to be rectangular solid,which is based on the cross section of the structural members.The elements are connected by the dummy springs.The impact action between concrete blocks after the connecting springs failed is taken into account by the impulse models of impact,which are derived from the results of the experiments and the numerical tests.A comparison between the shaking table test and analysis is presented,which shows the results of the simulation are in good agreement with the records of the shaking table test.
出处
《工程力学》
EI
CSCD
北大核心
2010年第6期89-97,共9页
Engineering Mechanics
关键词
离散单元法
混凝土框架结构
碰撞
倒塌反应
振动台试验
discrete element method
concrete frame structures
impact
collapse response
shaking table test
