In summarizes the predecessor to the segmental arch surface and outside in flexure critical load computational method foundation , with the principle of the minimum potential energy , an analytical solution for the lateral critical bucking load of cable stayed arch bridge is studied 在總結前人對圓弧拱的面內,面外屈曲臨界荷載計算方法的基礎上,利用能量法,推導了斜拉拱橋的側傾臨界荷載計算公式。