钢筋混凝土连续曲线箱梁桥温度变形研究

【作者】 张玥；

【导师】 胡兆同；

【作者基本信息】 长安大学 ， 桥梁与隧道工程， 2004， 硕士

【摘要】 钢筋混凝土连续曲线箱梁桥应用日趋广泛，己成为现代交通工程中的一种重要桥型。然而，在大量工程实际应用中发现，随着钢筋混凝土曲线箱梁桥的运营出现了梁体向径向外移，呈现较明显的旋转倾覆趋势。研究表明温度变化是引起钢筋混凝土曲线箱梁桥梁体产生变形的主要原因。本论文以浙江省衢州市落马桥为工程背景，在搜集大量连续箱梁桥的温度分布形式资料后，根据试验和计算提出了符合浙江地区公路大悬臂钢筋连续曲线箱梁桥的温度梯度，并在此基础上运用空间有限元程序(ANSYS)计算了不同几何参数对钢筋混凝土连续曲线箱梁桥变形的影响，从而得出不同参数对曲线箱梁桥变形的影响规律；同时结合计算结果从设计和构造两方面提出了限制曲线箱梁桥在温度荷载作用下产生不利径向变形的措施。希望本论文的研究能对曲线箱梁桥的温度梯度规定和防止梁体产生过大径向位移有一定的现实参考价值，以加速曲线梁桥设计理论的完善。更多还原

【Abstract】 The application of reinforced concrete continuous curved box- girder bridges is apparently wide, and it had becoming an important bridge style in modern communication engineering. However, during the actual application of abundance projects, with the operation of RC continuous curved box-girder bridges, the beam body occurred the outward displacement along racial direction and took on obviously circumrotate and overturning tendency. The research had shown that the main reason resulting in the deformation of RC continuous curved box-girder bridges is the change of temperature. Based on the LuoMa Bridge Quzhou city and the collection about a great deal of temperature gradient for continuous box-girder bridges, lots of test data were attained and analyzed. From these data and calculation, the paper derives the distributior, form of temperature for long cantilever continuous curved box-girder bridges on highway in ZheJiang region. By finite element program (ANSYS) the influence about different geometric parameters to the deformation for RC continuous curved box-girder bridges was calculated and obtained the affected regulation; at the same time ,with the result of calculation from design and structure aspects the limiting measurements of unfavorable deformation on temperature load for curved box-girder bridges were proposed. The research founding is hoped to have some reference value for the regulation of temperature gradient for curved box-girder bridges and prevention the excessive displacement along racial direction, and the perfection of design theory for curved bridges.更多还原