【作者】 熊杰；

【导师】 李亚东；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2009， 硕士

【摘要】 矮塔斜拉桥的施工是一个结构体系不断变化的过程,因此,为了实现桥梁的合理成桥状态,保证桥梁施工过程的安全,必须对整个桥梁施工过程进行严格的控制,这就是矮塔斜拉桥施工控制所要完成的主要任务。论文以广西柳州静兰大桥为工程背景,根据施工图设计,采用大型有限元计算分析软件桥梁博士建立了全桥有限元模型,研究了矮塔斜拉桥施工控制理论,对矮塔斜拉桥施工过程中的线形、应力、索力监控进行了较详细的论述。论文探讨了斜拉桥施工控制的一个重要方面:索力监测与控制。对使用频率法测量索力的影响因素进行了详尽的分析,重点分析了边界条件、自重垂度、抗弯刚度对索力测量的影响,提出了在一般条件下使用频率法测量索力的修正方法,为频率法测定斜拉索索力提供了精度保证。这些处理方法,可为矮塔斜拉桥的索力控制提供一定的参考。更多还原

【Abstract】 The construction of the short-pylon cable-stayed bridge is a continually changing process of its structure system. So in order to achieve rational complete bridge state and to ensure the safety of constructing bridge, it must be strict for the construction process, which is the central task of the short-pylon cable-stayed bridge construction control. Based on the design of a short-pylon cable-stayed brigde called JingLan Bridge, a finite element model of entire bridge was established with beam element using Bridge Doctor software. This thesis reaserch about the construction control of the short-pylon cable-stayed bridge, particularize the control of the linetype, stress and cable force in the process of pylon cable-stayed bridge construction.The thesis discusses one of the main parts in construction control, that is, control and detection of the cable force in the process of pylon cable-stayed bridge construction, and analyses in detail the effect factors of measuring the cable force. by frequency method. And through discussing effect factors of the boundary conditions, gravity sag and flexural rigidity of the cable, a modified method to deal with the error about the frequency method to measure the cable force in commonly condition is given. The suggested practicable methods can give guarantees the precision of the frequency method to measure the cable force and reference for the onstruction control of the cable force in short-pylon cable-stayed bridge.更多还原