- 摘 要
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饒芝英 童根樹
（浙江大學土木系 杭州 310027）[提要] 對楔形變截面軸壓桿在各種邊界條件（包括彈性約束）下的穩(wěn)定性進行了詳細研究，提出了簡單而精度較高的計算式；對門架有側(cè)移失穩(wěn)時變截面梁對柱子提供的轉(zhuǎn)動約束進行了分析，提出了高精度的近似計算式，可直接用于計算變截面門式剮架的計算長度或臨界荷載。
[關鍵詞] 門式剛架 穩(wěn)定性 楔形桿件 臨界荷載 計算長度 邊界條件The stability of tapered member of variable cross-section under axial pressure loads in every boundary
condition is researched, and a simple mathematical formula with high precision is given. Then the rotative restraint of column supported by non-uniform beam when portal frame loses stability with lateral displacement is analyzed, and a mathematical formula with high precision is obtained which can calculatethe calculating length or critical load of portal frame.
Keywords: portal frame; stability; tapered member; criticalload; calculating length; boundary condition
