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斜拉桥主要由拉索、主梁及索塔组成。斜拉索直接锚于主梁上,拉索受巨大拉力,水平分力使主梁受压,塔梁为压弯构件。悬索桥主要由主缆、加劲梁、吊索、索塔、锚碇和鞍座六个部分组成。主缆在恒载作用下具有很大的初始张力,恒载状态下,主塔基本无弯曲内力。加劲梁的弯曲内力主要来自二期恒载和活载。
Cable-stayed bridge is mainly composed of cable, main beam and cable tower. The stay cable is directly anchored to the main girder, and the cable is subjected to huge tensile force. The horizontal component forces the main girder to be compressed, and the tower girder is the bending member. Suspension bridge mainly by the main cable, stiffening girder, slings, pylon, anchor 碇 and saddle six parts. Main cable under the action of constant load has a great initial tension, under constant load condition, the main tower basically no bending internal force. Curved beam bending internal force mainly from two dead load and live load.