基于悬链线形的斜拉桥极限跨径

该文通过建立斜拉索的平衡微分方程,将沿索长分布的均布荷载转化为沿跨度分布的等效均布荷载,并对方程进行求解,得到斜拉索的悬链线形方程。该方程可用于较精确地计算斜拉索性能。基于该方程,研究了斜拉桥的极限跨径。研究结果表明,斜拉桥的极限跨径与塔高有关,在可接受的塔高范围内,斜拉桥的极限跨径为3 000 m左右,若采用CFRP拉索可提高到6 000 m左右。

Terminal Span of Cable-stayed Bridge Based on Catenary

The article sets up the equilibrium differential equation of stayed cable,translates the uniform load distributed along the cable length into the equivalent uniform load distributed along the spans,solves the equations and gives the catenary equation of the stayed cable.This equation can be used for more accurately calculating the performance of stayed cable.Based on this equation,the article studies the terminal span of cable-stayed bridge.The studying result shows that the terminal span of cable-stayed bridge is related to the pylon height.The terminal span of cable-stayed bridge is about 3000 m within the acceptable range of pylon height.The terminal span can be about 6000 m if CFRP stayed cable is used.