关于雁形截面梁的局部稳定问题
- 摘 要
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李开禧 崔佳 代国欣 (重庆建筑大学 630045)周绥平 (重庆建筑高等专科学校 630030)
[提要] 本文在阐明雁形截面梁翼板局部失稳机理的基础上,导出相应弯矩临界值的计算公式,从而建议用控制翼板侧向弯曲刚度的方法置换宽厚比的限制条件,疫其能正确反映板内横向钢筋的作用。文中理论分析的结论已为大型雁形截面梁的实验所印证,可供实际应用参考。
[关键词] V形折板 局部稳定 宽厚比 计算长度This paper clarifies the local stability problem about V shape beams. On the basis of stability mechanism, author introduce the calculation formula of crit/cal moment. A suggestion is presented. That is to using a method that controls the flange's outside moment rigidity to replaces the method that limets flange's wide-thick ratio. This method can represent the action of cross reinforcement correctly. This analysis has been confirmed by the test of V shape beams. It can be used for engineering.
Keywords: V shape beams;local stability; wide-thick ratio; calculating length