钢管混凝土拱桥的挠度限值研究

为了分析挠度限值是否能控制钢管混凝土拱桥结构的振动,在对桥梁活载挠度限值研究进行回顾的基础上,以3座不同结构形式的钢管混凝土拱桥为典型算例,分别采用挠度限值和动力参数限值对钢管混凝土拱桥的行车舒适性进行了分析。分析结果表明:挠度限值并不能有效地反映在活载作用下的实际振动和振感;建议在钢管混凝土拱桥的设计中,采用振动参数控制法取代活载挠度限值法来评价和控制钢管混凝土拱桥的行车舒适性。

Research on Deflection Limit Value for CFST Arch Bridge

In order to research the problem whether the deflection limit value controls CFST arch bridge structural vibration or not,based on the literature review of the deflection limit values,three different type CFST arch bridges were taken as examples study to examine the vehicle occupant comfort by the method of live-load deflection limit values and vibration parameter limit values.Analytical results show that the live-load deflection limit values can not control the vibration of bridges under the effect of live-load effectively.In the design of CFST arch bridges,vibration parameter control method is more reasonable to assure pedestrian and vehicle occupant comfort compared with live-load deflection limit values method.