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力学与实践 ›› 2010, Vol. 32 ›› Issue (2): 108-111.doi: 10.6052/1000-0879-2009-157

• 应用研究 • 上一篇    下一篇

铰接门式刚架柱的计算长度系数

田兴运   

  1. 西北农林科技大学水利与建筑工程学院,陕西杨陵
  • 收稿日期:2009-04-13 修回日期:2009-08-05 出版日期:2010-04-08 发布日期:2010-04-08

EFFECTIVE LENGTH FACTORS OF GABLED FRAMES COLUMN WITH HINGES

  • Received:2009-04-13 Revised:2009-08-05 Online:2010-04-08 Published:2010-04-08

摘要: 采用中性平衡法分析了5榀铰接门式刚架的稳定性,通过理论分析和规范方法计算了刚 架柱的计算长度系数. 计算结果表明: 中性平衡法分析结果与有限元法的结果一致;按规范 规定,摇摆柱的计算长度系数为1,但分析结果都大于1;对刚架柱,各规范或规程的计算结 果不仅相差较大,而且与中性平衡法的分析结果相差也比较大. 说明规范方法并不适用计算 铰接门式刚架的稳定性,对于此类刚架应该通过稳定分析获得刚架柱计算长度系数.

关键词: 中性平衡法, 稳定方程, 铰接, 门式刚架, 计算长度系数

Abstract: Five gabled frames with hinges are analyzed by the equilibrium method and the effective length factors of coulumns are determined by solving stability equations, theoretical analysis and codes for design or technical specifications. The calculation results show that the results of the equilibrium method and the finite element method are consistent; the effective length factors of leaning columns are equla to one by codes for design or technical specifications, but greater than one by the equilibrium method; for frame columns, the calculation results of codes for design or technical specifications are different from those obtained by equilibrium method. It is shown that the code method is not suitable to analyze the frame stability, the effective length factors of the frame columns should be obtained by the second order analysis.

Key words: Equilibrium method, stability equation, hinge, gabled frames, effective length factor