高强钢筋高强混凝土框架梁柱节点非线性有限元分析  

Nonlinear Finite Element Analysis on High-Strength Frame Joints Reinforced by High-Strength Rebar

作　　者：阎石[1] 倪鹏[1] 张曰果[1] 郑文泉[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2009年第1期80-85,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省自然科学基金项目(20052005)

摘　　要：目的研究在高强混凝土框架梁柱节点中配置高强纵筋和高强箍筋,增强对高强混凝土的约束,以此来提高节点的承载能力和变形性能.方法利用有限元软件建立框架节点模型,通过改变轴压比、配箍率、钢筋强度等参数对节点进行一次单调加载情况下的非线性数值分析,得出不同参数下的荷载-位移曲线.并将数值分析结果与试验结果进行比较.结果明确了节点承载能力和变形性能随各参数变化的规律,并对该类结构轴压比限值及箍筋间距给出合理建议.结论在框架梁柱节点内合理配置一定数量的高强钢筋不仅可以提高其承载能力而且可以改善其变形性能.The paper presents a nonlinear finite method by analyzing high - strength concrete frame joints reinforced by high - strength rebar for the purpose of increasing the bearing capacity and deformation. The rebar has properties of high strength, low relaxation and high bond strength to enhance the restriction to the core concrete. The FEM is applied to set up a model for the nonlinear analysis under a monotonous loading to obtain load -displacement relationship curves with various parameters by changing the axial compression ratio, stirrup reinforcement ratio and the strength of rebar. A comparative study is finished between the results of numerical simulation and experiment and they match well. The results of the simulation further demonstrate the mechanisms of the forced joints and clarify the rules for the bearing capacity and deformation of the joints with various parameters. The results also show that the bearing capacity and deformation of the joints can be increased to some extent by reinforcing a reasonable amount of high - strength rebar in the core concrete of the joints.

关 键 词：高强混凝土框架节点 高强钢筋 非线性分析 轴压比 变形性能 

分 类 号：TU352.1[建筑科学—结构工程]