【摘要】 依照千斤顶斜拉扣挂悬拼架设钢管混凝土拱桥的施工工艺,采用力矩平衡原理推导出扣索索力表达式;在分析温度效应时考虑二阶效应,导出了预抬高量与扣索变形之间的关系。最后,以广西邕宁县邕江大桥为例,采用多个温差段分析温度对预抬高量的影响。研究表明,温差较大时对预抬高量有一定的影响,但二阶效应可略去。更多还原

【Abstract】 The concrete-filled steel tube arch bridge is assembled by drawing stay cables through hoisting jack during construction. The expression of stay cable force is derived by adopting the equilibrium principle of force moment. Considering the second-order effect in analyzing temperature effect, the relationship between preraised height and the deformation of stay cables is obtained. Taking Yongjiang bridge of Yongning in Guangxi for instance, the effect of temperature to the preraised height is studied using several temperature phrases. It is concluded that temperature can affect preraised height to some degree if the difference of temperature is great enough, but the second-order effect can be neglected.更多还原