【摘要】 三肢桁式截面拱肋的钢管混凝土拱桥是一种新颖而实用的桥梁结构 ,在实际工程中已经得到了应用。针对目前此类桥梁的设计未考虑其动力特性而造成安全隐患 ,以某一工程为实例 ,在拱轴系数、矢跨比、截面特征系数与横撑设置等方面进行动力特性优化 ,采用有限元法为此类桥梁的设计提供依据更多还原

【Abstract】 The arch bridge of concrete filled steel tube with triangle truss arch slabs is new and practicable, however, at present this kind of bridges have hidden troubles in safety for not considering dynamic characteristics during design. The paper optimizes the dynamic characteristic at the aspects of arch axis ratio, rise to span ratio, geometrical coefficient of section and setting of horizontal braces between two arch slabs on basis of a practical bridge with the finite element method, and thus provide the basis for the design of this kind of arch bridges.更多还原