摘要
采用ANSYS有限元软件对Q460高强角钢两端偏心压杆进行了三维实体建模,有限元数值模拟分析,除考察了不同长细比、不同截面与初弯曲等模型参数之外,还考察了残余应力对高强单角钢稳定承载力的影响.由分析可知:构件绕平行于连接板的轴线发生弯曲变形,同时伴有绕角钢纵轴的扭转变形,残余应力对构件承载力影响小于5%.有限元分析的构件稳定承载力与实验值和理论值进行对比,结果表明:有限元值比试验值和美国《输电铁塔设计导则》(ASCE10-1997)高-8.89%^+11.1%a和-0.39%^+35.36%,有限元分析值和试验值吻合较好.因此,有限元分析结果是可靠的,可以通过有限元法分析两端偏心受压高强角钢的受力性能.
The behavior and load-carrying capacity of Q460 high-strength single-angle compression members with eccentricities at both ends were studied by using the method of three-dimensional modeling of solid structures by ANSYS.In addition to such factors in model experiment as different slenderness ratios,different types and initial out-of-straightness,influences of residual stresses on ultimate load-carrying capacity were analyzed by finite element numerical simulation analysis.The analysis shows that the bending deflection of the angle occurred in a direction parallels the connected leg,and meanwhile,the twisting deformation occurred in a longitudinal direction of specimen,and the residual stresses affect the ultimate load-carrying capacity of angles by about 5% or less.Finite element results are compared with theoretical results.The results show that finite element value is about-9.99% ～＋9.76% and-0.39%～＋35.36% larger than experimental value and American Design of Latticed Steel Transmission Structure（ASCE10-1997）,and the agreement is somewhat good between the finite element analysis and experimental program.Therefore the finite element results are reliable,and using finite element method to analyze buckling strength of high-strength single-angle with eccentricities at both ends is feasible.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2010年第3期387-393,共7页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
河南省电力勘测设计院资助项目
关键词
单角钢
偏心受压
屈曲
有限元法
single angle
eccentrically compression
buckling
finite element method
