桥梁在道路交通中发挥着及其重要的作用,对于经济的发展就有很强的促进作用。桥梁的形式是多种多样的,从传统的石材结构到钢筋混凝土结构再到现在的钢结构,不同的结构拥有不同的特征,发挥着不同的作用,具有不同的经济效益。本文将针钢结构的桥梁进行分析,探究其具有怎样的经济性。 Bridges play an important role in road traffic and promote the development of economy. The form of the bridge is varied, ranging from the traditional stone structure to the reinforced concrete structure to the current steel structure, different structures have different characteristics, play different roles, with different economic benefits. This paper analyzes the bridge of the needle steel structure and explores how it has the economy.