冷成型薄壁C型钢构件压弯滞回性能的数值分析  

Numerical Analysis of the Hysteretic Behavior of Cold-formed Thin-Wall C Steel Members under Constant Compression and Cyclic Bending

作　　者：董军[1] 陆曦[1] 王士奇 

机构地区：[1]南京工业大学新型钢结构研究所,南京210009 [2]山东省冶金设计院,济南250014

出　　处：《防灾减灾工程学报》2006年第4期419-424,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：江苏省自然科学基金项目(BK2005116)

摘　　要：应用大型有限元软件ABAQU S,采用考虑几何和材料非线性的S4R 5壳单元和线性随动强化模型,考虑角部冷成型强化效应的影响,建立了常轴力、循环弯矩荷载作用下的C型钢构件有限元模型,分析了构件宽厚比和轴压比对冷成型薄壁C型钢构件滞回性能的影响。分析结果表明:宽厚比和轴压比对构件滞回性能影响显著,随着宽厚比的增加,构件承载、转动以及塑性变形能力降低;随着轴压比增加,构件的最大承载力降低,承载力退化。Abstract： By using the finite element analysis program ABAQUS, $4R5 general--purpose shell elements are employed for establishing the finite element models of cold-formed thin-wall C-section steel members under constant compression and cyclic bending. The geometric and material nonlinearities, the linear kinematic hardening and the effect of strain hardening at corner zone by cold forming are taken into account in the model. The effect of the width-to-thickness ratio and the axial compressive ratio on the hysteretic behavior of the cold-formed steel members are analyzed. Analytic results indicate that the width-thickness ratio and the axial compressive ratio affect the hysteretic behavior of the member evidently. With the increase of the width-thickness ratio, the resistance, rotation capacity and plastic deformation capacity decreases. With the increase of the axial compressive ratio, the ultimate resistance decreases and the resistance degenerates.

关 键 词：冷成型钢 滞回性能 宽厚比 轴压比 

分 类 号：TU392.1[建筑科学—结构工程]