基于离散单元法的钢筋混凝土框架非线性分析  

Nonlinear analysis for RC frame structures based on discrete element method

作　　者：王强[1] 尹镇平 高翔[1] 郝露露[1] 

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《沈阳工业大学学报》2015年第3期347-354,共8页Journal of Shenyang University of Technology

基　　金：国家自然科学基金资助项目(51178279)

摘　　要：为了能够更好地描述在模拟强震作用下结构倒塌破坏过程中构件的断裂、碰撞等现象,在杆段多弹簧模型的基础上构建了节点单元来考虑框架梁柱的连接关系,进而建立了钢筋混凝土框架结构的离散元整体分析模型,并对钢筋混凝土平面框架在低周往复加载情况下的受力行为进行了数值模拟.分析结果表明,该模型能够较准确地描述复杂受力状态下钢筋混凝土框架的非线性力学行为,能够满足结构强震作用下倒塌全过程精细化分析的需求.In order to better describe such phenomena as fracture and collision of components in the collapse and damage process of structures under the action of simulated strong earthquake,a node element was established on the basis of segment-multi-spring model( SM SM) to consider the connection relationship between the beams and columns of frame,and then the discrete element integral analysis model for the reinforced concrete( RC) frame structures was established. In addition,the numerical simulation was performed for the forcing behavior of RC plane frame under the lowcyclic loading condition. The analysis results indicate that the proposed model can accurately describe the nonlinear mechanical behavior of RC frame structures under the complex forcing states,and can meet the demand for the detailed analysis on the entire collapse process of structures under the action of strong earthquake.

关 键 词：离散单元法 杆段多弹簧模型 本构模型 钢筋混凝土框架结构 节点单元 非线性分析 数值模拟 低周往复加载 

分 类 号：TU375.4[建筑科学—结构工程]