關于雁形截面梁的局部穩(wěn)定問題
李開禧 崔佳 代國欣 周綏平
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李開禧 崔佳 代國欣 （重慶建筑大學 630045）周綏平 （重慶建筑高等專科學校 630030）
[提要] 本文在闡明雁形截面梁翼板局部失穩(wěn)機理的基礎上，導出相應彎矩臨界值的計算公式，從而建議用控制翼板側向彎曲剛度的方法置換寬厚比的限制條件，疫其能正確反映板內(nèi)橫向鋼筋的作用。文中理論分析的結論已為大型雁形截面梁的實驗所印證，可供實際應用參考。
[關鍵詞] V形折板 局部穩(wěn)定 寬厚比 計算長度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
