热力耦合作用下的H型截面钢框架力学性能影响因素有限元分析  

Finite Element Analysis of Influencing Factors on Mechanical Properties of H-section Steel Frame under Thermal Mechanical Coupling

作　　者：李雨城 王伟 王兴[1] LI Yu-cheng;WANG Wei;WANG Xing(School of Mechanical Engineering, Anhui Sanlian University, Hefei 230601, China)

机构地区：[1]安徽三联学院机械工程学院,安徽合肥230601

出　　处：《佳木斯大学学报（自然科学版）》2020年第6期55-58,共4页Journal of Jiamusi University：Natural Science Edition

基　　金：安徽高校省级自然科学研究重大项目(KJ2014ZD06);安徽省自然科学基金(1408085QE96);安徽省高校学科拔尖人才学术资助项目(gxbjZD56)。

摘　　要：热力耦合作用下钢框架力学性能的研究是目前研究的热点之一。本文通过有限元模拟的基础上,介绍了热力耦合作用下的钢框架在不同温度场下的力学性能,通过有限元模拟对不同影响因素下的单层单跨H型截面钢框架力学性能与位移的研究,包括模型一与模型二在不同轴向刚度下对钢框架结构力学性能的比较,模型三、模型四、模型五在不同转动约束刚度下对钢框架结构力学响应的对比分析,研究表明:随着温度值的增加,钢框架结构的轴力整体呈现先增大后减小的趋势,模型二比模型一轴力变化较明显,模型二的柱端弯矩较大,模型二比模型一的挠度变化幅度较明显,最终挠度大小基本相同;通过对模型三、模型四、模型五之间相互比较,模型五轴力较大、模型五弯矩变化较明显,模型四的挠度变化较明显,最终挠度大小基本相同。通过在不同影响因素的比较,轴向刚度较小的钢框架对结构有利,转动约束刚度较小的钢框架结构力学性能较好。研究成果可为热力耦合作用下的钢框架选优提供参考价值。The research on the mechanical properties of steel frames under thermal mechanical coupling is one of the hot topics.Based on the finite element simulation,this paper introduces the mechanical properties of steel frame under thermal mechanical coupling under different temperature fields.Through the finite element simulation,the mechanical properties and displacement of single-layer single span H-section steel frame under different influence factors are studied,including the comparison of mechanical properties of steel frame structure between model 1 and model 2 under different axial stiffness,model 3 and model 4.The results show that:with the increase of temperature,the axial force of steel frame structure first increases and then decreases.The axial force of model 2 changes more obviously than that of model 1,and the column end bending moment of model 2 is larger than that of model 1,and the deflection of model 2 is more obvious than that of model 1.Compared with model 3,model 4 and model 5,the axial force of model 5 is larger,the bending moment of model 5 changes obviously,the deflection of model 4 changes obviously,and the final deflection is basically the same.Through the comparison of different factors,the steel frame with smaller axial stiffness is beneficial to the structure,and the steel frame with smaller rotational restraint stiffness has better mechanical properties.The research results can provide reference value for the optimization of steel frame under thermal mechanical coupling.

关 键 词：热力耦合 钢框架 力学性能 有限元模拟 

分 类 号：TU352[建筑科学—结构工程]