论文部分内容阅读
目的:本文旨在对系列文章第一部分所得到的理论推导结果进行相应的有限元数值验证,同时对内核单波变形下的支撑构件进行参数分析。方法:采用通用有限元软件ABAQUS建立六个防屈曲支撑模型对内核单波变形下理论推导公式进行校核;并对理论公式进行参数分析,考察外围构件抗弯刚度、间隙大小、内核构件厚度、内核构件宽厚比、铰接接头长度、外围约束构件初始缺陷、外围构件长度、内核约束加强段长度及内核加强段翼板高度等9个参数对内核挤压力及外围构件受力影响;最后通过对12个防屈曲支撑进行数值模拟,验证支撑设计理论的合理性。结论:该理论设计公式能较好地预测支撑的破坏情况及内力发展情况,具有较强的安全性和较广的适用性,为铰接防屈曲支撑的使用推广奠定理论基础。
Aims: The purpose of this paper is to verify the theoretical derivation of the first part of the series of articles by numerical simulations of the finite element method, and to analyze the parameters of the support members under single-core deformation. Methods: Six anti-buckling brace models were established by using general finite element software ABAQUS to check the theoretical derivation formula of single-core-core deformation. The parameters of the theoretical formula were also analyzed. The influences of the bending rigidity, clearance, core member thickness, 9 parameters such as the aspect ratio of the core member, the length of the hinge joint, the initial defect of the outer restraining member, the length of the outer member, the length of the restraining core of the inner core and the height of the flange of the inner core are used to influence the stress of the core and the force of the outer member. Finally, Twelve buckling-proof supports were simulated to verify the rationality of brace design theory. CONCLUSION: This theoretical design formula can better predict the failure condition and internal force development of support, has strong safety and wide applicability, and lays the theoretical foundation for the promotion of the use of hinged anti-buckling support.