【作者】 江南；

【导师】 李乔；

【作者基本信息】 西南交通大学 ， 桥梁与隧道工程， 2004， 硕士

【摘要】 大跨高墩曲线连续刚构桥结合了曲线梁桥和刚构桥的受力特点，加之高墩、大跨的柔度较大，使结构分析变得复杂。本文以太枣沟大桥为背景，采用韩国有限元软件MIDAS／Civil建模并计算，旨在分析大跨高墩曲线连续刚构桥的变形特性，并对大跨高墩曲线连续刚构桥的非线性计算做了初步分析。全文主要包括三大部分： (1)讲述悬臂施工设置预拱度的原理，从而推导曲线桥悬浇施工时预留位移的一般计算公式。 (2)考虑施工过程，分析梁体自重、预加应力、挂篮荷载、二期恒载及汽车活载等因素单独作用下，对结构变形的影响。从而正确指导悬臂施工时预拱度的设置，保证结构成桥后达到理想的线形。 (3)介绍几何非线性分析的方法，对最大悬臂状态及汽车活载作用下结构的线性和非线性变形分析结果做比较。更多还原

【Abstract】 Continuous curved rigid frame bridge with long-span and high-pier combines the mechanical properties of curved girder bridge and rigid frame bridge, and with its characteristic of flexibility caused by long-span and high-pier, its structural analysis becomes more complex. Based on Tai zaogou Bridge, the MIDAS/Civil finite element software by Korea is adopted in this thesis to analyse the deformation features of continuous curved rigid frame bridge with long-span and high-pier. A preliminary nonlinear analysis of continuous curved rigid frame bridge with long-span and high-pier is also provided in the thesis. The main contents consist of three parts:1. Describe the principles of setting camber in the process of cantilever construction and deduce the general formulas for its calculation.2. Whereas construction stages, the dead load, prestressing force, traveling carriage load, the secondary dead load and moving vehicles load are considered separately in the deformation analysis to correctly control the setting of camber and guarantee the bridge deck and pier to reach the ideal shape.3. Introduce geometric nonlinear analysis method, and compare the deformation calculated with linear and nonlinear method under the two load cases: the longest cantilever case in construction stage and the moving vehicle load case in service stage.更多还原