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针对传统防屈曲支撑自重较大、加工运输安装不便等问题,该文提出几种新型的分离式防屈曲支撑构件,其由两个传统的单内核防屈曲支撑构件作为分肢,通过连续的钢腹板连成整体。分离式截面可增大防屈曲支撑的整体抗弯刚度,最大效率地提高支撑的承载效率,因此特别适合大吨位防屈曲支撑构件的设计。在此基础上,利用能量法中的Ritz法推导了两端铰接的分离式防屈曲支撑的弹性屈曲荷载计算公式,可直接用于计算防屈曲支撑设计中的重要参数即约束比,并用有限元弹性屈曲分析进行了验证。该文研究为这几种新型防屈曲支撑的弹塑性性能和设计方法等后续研究提供了基础。
In order to solve the problems of traditional anti-buckling support such as heavy self-weight, inconvenience of processing and transportation, several new types of separate anti-buckling support members are proposed, which are composed of two traditional single-core anti-buckling support members, Web together into a whole. The separation section can increase the overall flexural rigidity of buckling brace and improve the bearing efficiency of the brace with maximum efficiency, so it is particularly suitable for the design of large tonnage buckling brace members. On this basis, the Ritz method of energy method is used to deduce the elastic buckling load calculation formula of the split buckling brace with both ends hinged, which can be directly used to calculate the restraint ratio, which is the important parameter in buckling brace design. Elastic buckling analysis was verified. The research of this article provides a basis for subsequent studies on the elasto-plastic properties and design methods of these new types of buckling braces.