【摘要】 通过罚函数对单跨铰接变截面门式刚架的优化截面尺寸和内力对节点螺栓、端板设计的影响分析发现,优化设计强调了刚架腹板高度的利用,且有效地改善控制截面内力的合理分布。但端板厚度用目前我国现行的CECS 102-2002《门式刚架轻型房屋钢结构技术规程》设计时,由于必须保证其厚度大于16 mm,致使不能有效地减少端板用钢量的投入。如果采用EUROCODE 3欧洲钢结构规范,则在刚架优化设计条件下,节点端板用材的节省效果将是明显的,在文章的算例中,C,B两节点的用材是传统设计条件下的80.78%。随着端板设计厚度的合理减小,还可以改变节点在反复荷载下的滞回曲线,有利于结构的抗震作用。建议相关部门在下一轮的规范或规程制定时,注意吸收国外的设计理念。更多还原

【Abstract】 According to the analysis of control section and internal force through SUMT optimal portal frame design,optimal design not only emphasizes the use of the height of rigid frame web plate,but also effectively improves the rational distribution of internal force in control section.However,when we design node-connected endplate in the rules of portal frame design(CESCS102),it is required that the thickness of the plate should be greater than 16 mm,which makes it impossible to reduce the steel used in node-connected endplate design.If EUROCODE 3 constituted by European Committee of Steel Structure is adopted,the steel used in node-connected endplate design will reduced remarkably.In one example of the article,the input of steel in C and B nodes is 19.22% less than it is under traditional design condition.Along with the rational reduces of the endplate design thickness,the hysteresis curve in repeated loads may be changed,which has a beneficial earthquake resistant effect for structure.It is suggested that the foreign design conceptions should be used in the completion of the newer code and standard.更多还原