【作者】 赵毓成；

【导师】 张文献；

【作者基本信息】 东北大学 ， 结构工程， 2006， 硕士

【摘要】 本文利用现有的钢管混凝土结构计算温度应力方法，对影响钢管混凝土拱结构的温度应力因素进行分析，并考虑钢管拱肋施工时的焊接影响，最后得出：钢管壁厚的变化对结构温度应力影响甚微，焊接对钢管混凝土拱肋温度应力的影响亦不显著；又通过有限元模拟，利用黑龙江依兰牡丹江大桥的实测参数进行校验，提出了一有效建模方法；同时还分析了太阳辐射对桥梁结构温度的分布参数，给出了分析钢管混凝土拱桥温度应力计算流程图。 总结世界各主要发达国家桥梁设计规范中的计算温度力条文，对浙江义乌宾王大桥根据不同的规范计算，并用有限元模拟实际温度计算温度应力对比分析，得出：采用中国现行桥规，温度应力计算值明显偏大，结果偏于保守，浪费材料，而中国旧桥规又明显偏小，值得设计人员关注；若以实桥的现场参数进行温度模拟，计算温度应力，比较符合实际；当不具备条件时，以英国桥梁设计规范计算温度应力较贴近实际，中国现行桥规计算钢管混凝土拱桥温度应力有待探讨。 文章最后通过对浙江义乌宾王大桥温度荷载分析，得出了在由上至下和由周边向核心呈梯度变化的温度荷载作用下钢管混凝土拱桥结构应力随温度值、钢管壁厚值和混凝土标号值变化时的规律，即：轴力、弯矩以及剪力随着温度变化值增大而增大；钢管混凝土拱桥主拱肋的控制截面应力值亦随之增大，基本呈线性关系；并通过计算论证了拱肋各截面应力、内力值同钢管壁厚的变化、核心混凝土标号变化无关。在实际工程中，在确定钢管壁厚与核心混凝土标号时不必考虑温度荷载，可供设计人员参考。更多还原

【Abstract】 The article used the the method that calculated concrete filled steel tubular (CFST) structure temperature stress, analysised factors which can affect temperature stress of the CFST arch bridge ,and finally we can conclude that the change of steel pipe wall thickness and the weld to the steel pipe is not also remarkable influence on temperature stress; and through finite element method(FEM),verified with the Heilongjiang the Yilan Mudanjiang Bridge actual parameter, provided an effective method to construct model; at the same time, it also analysised the effect of solar radiation to arch bridge structure temperature distributed, provided a program process of computation temperature stress.The article summarized the difference among many current developed countries bridge design codes, including Chinese old bridge code, and calculates the Yiwu-binwang Bridge with these codes, and compares with the result of real bridge of simulating the actual temperature to compute with the FEM, the result that using the Chinese old bridge code is smaller than real condition, and the result of Chinese current norm is obviously bigger. So the difference is worth paying attention to design bridge; it is better that the real bridge parameters are used to compute the temperature stress, so we can get that the result is accorded the actuality. If we don’t have, we can compute the temperature stress with norm of English bridge. Chinese bridge norm needs probing.The article finally through analyzing of the Zhejiang YiwuBinwang bridge temperature load, obtained the CFST arch bridge temperature stress rules with the temperature load which is including from top to bottom and from margin to core of arch-rib when the temperature value、 steel pipe wall thickness value and marking value of concrete change. The rule is that the axial force、 bending moment, as well as the shearing force elevates along with the change of temperature increases, so the control section stress which is linear relationship is. The article further proved the change of steel pipe wall thickness and marking value of concrete is not remarkable influence on temperature stress and internal force of arch rib’s control section. In actual project, determination the thickness of steel pipe wall and the value of concrete marking needs not to consider the temperature load.更多还原