随着钢管混凝土拱桥的跨径的增大,刚度越来越柔,作为以受压为主的结构,稳定成为制约其发展的关键因素之一。不少学者根据不同的拱桥形式在不同的参数下,提出了不同的假设,推导出了很多简化的稳定公式。这些稳定公式将为有限元发展提供了理论基础。在此主要是对拱桥稳定计算理论进行简单的阐述。 As the span of CFST arch bridges increases, the stiffness becomes more and more soft. As a structure subject to compression, stability becomes one of the key factors restricting its development. Many scholars put forward different assumptions under different parameters under different arch bridge forms, and deduce a lot of simplified stability formulas. These stability formulas will provide the theoretical foundation for the development of finite element. Here is a brief account of the stability theory of arch bridges.