论文部分内容阅读
斜拉桥属高次超静定结构,施工过程复杂,索力的施工控制与成桥状态具有相关性。索力的施工控制是将设计理论状态转变成实体受力的过程,是斜拉施工过程中最关键的控制技术之一,其主要目的是为了保证施工过程中结构的安全可靠,主桥线形合理、顺利合龙及成桥后结构内力合理。尤其是悬臂施工的斜拉桥,在施工过程中受到温度、收缩、徐变等因素的影响,使成桥后桥梁线形和内力的可调范围都比较小,因此需要对斜拉桥索力施工进行严格控制,以保证实现桥梁设计状态。以东合大桥为施工背景,浅谈斜拉桥索力分析及控制技术。
Cable-stayed bridge is a high-order statically indeterminate structure, the construction process is complex, the construction control of cable force has a correlation with the state of the bridge. The construction control of cable force is the process of transforming design theory state into physical force, which is one of the most critical control technologies in cable-stayed construction. The main purpose of cable force construction is to ensure the safety and reliability of the structure during construction, , After the successful closure of the bridge structure and internal forces reasonable. In particular, the cantilever construction of the cable-stayed bridge, the construction process by the temperature, shrinkage, creep and other factors that make the bridge after the bridge adjustable linear and internal forces are relatively small, so the need for cable-stayed bridge cable construction Strict control to ensure bridge design status. Taking Donghe Bridge as construction background, the cable force analysis and control technology of cable-stayed bridge are discussed.