摘要
多跨连静定梁结构是幕墙设计中最常用的立梃受力结构形式,关于空中铰伸出支座的最优长度问题一直是一个设计师比较模糊甚至缺少概念的问题。通过理论推导和有限元软件数值模拟充分论证了分别在强度最优和挠度最优条件下空中铰外伸长度的最佳比例值为外伸段占层高的14.7%时为强度最优(弯矩最小),外伸段点层高22.5%时挠度最优(变形最小)。计算结果以期能够指导我们的日常设计工作,减少材料用量,降低成本。
Multi-span statically determinate beam is one of the most common structural forms of the mullion in the design of curtain wall. However,the optimal length of the air hinges outside the supports is still an ambiguous problem for the designers. Through the comparison of analytical derivation and numerical simulation using the finite element software 3D3 S,the best length could be determined to satisfy the optimum strength and deflection. The extended length of the air hinges accounted for 14. 7% and 22. 5% of one story high could respectively realize optimum strength and deflection. These results are expected to provide the reference for designing the cost-effective curtain wall.
作者
符旭晨
刘斌
刘旭涛
FU Xuchen LIU Bin LIU Xutao(Zhongnan Curtain Wall Company, Hangzhou, Zhejiang 310052, China)
出处
《水利与建筑工程学报》
2017年第1期143-146,209,共5页
Journal of Water Resources and Architectural Engineering
关键词
多跨连静定梁
空中铰
强度最优
变形最优
multi-span statically determinate beam
air hinge
optimum strength
optimum deflection
