Abstract: From the angle of structural deformation，buckling stability and pneumatic stability，the research on limitation span of the whole self-anchored cable-stayed bridge structure system was carried out on current level of material and construction. The analysis shows that the effect of transverse limit static gust wind is the first factor to be considered and the secondary factor is the impact of live load in the control of construction condition in cable-stayed bridge design. In design， the primary problem to solve is lateral stiffness of the main girder. It is feasible preliminarily to build a main span of 1 500 m self-anchored cable-stayed bridge in current condition. Through the analysis of limit span，some technical measures to increase the span of the cable-stayed bridge are proposed，which provides reference in concept design of super long span cable- stayed bridge.

Key words: cable-stayedbridge, limitationspan, limitstaticgustwind, sageffect, bucklingstability, flutterstability

摘要： 从结构变形、压屈稳定性、风动稳定性等角度探讨了当前材料水平和施工水平下全自锚斜拉桥结构体系的极 限跨径。研究表明:控制斜拉桥设计的工况首先是横向极限静阵风作用，其次才是活载作用，设计中首先要解决主 梁的侧向刚度问题;当前条件下建设一座主跨1500m左右的自锚式斜拉桥是初步可行的。通过极限跨径分析，提 出了进一步增大斜拉桥跨径的技术措施，可供超大跨度斜拉桥概念设计时参考。

关键词: 斜拉桥, 极限跨径, 极限静阵风, 垂度效应, 屈曲稳定性, 颤振稳定性