斜拉桥施工控制中的温度影响分析

研究目的：研究温度场对斜拉桥施工控制的影响。研究方法：本文主要研究了斜拉桥的温度场的特点、类型和计算方法，结合云阳长江大桥工程实际，利用有限元方法建立空间模型，对其温度影响进行了计算并与实测值进行了对比分析。 研究成果：本文分析了结构体内温度场的规律性，表明日照等不均匀温差对斜拉桥结构的影响很大，并证明利用该方法得出的结果与实际比较吻合。 研究结论：本文提出的计算方法可以比较准确地计算斜拉桥施工控制中的温度影响，有利于施工中调整主梁的线形、应力，符合可靠性的要求。

Analysis of Temperature Effect on Control of Construction of Cable-stayed Bridge

Research purposes:The purposes were to make research on the effect on control of construction of cable-stayed bridge by temperature field.Research methods:The research was made on the features,types and computing method for the temperature field of cable-stayed bridge in this paper.In combination with the construction practice of Yunyang Yangtze Bridge,the space model was established by adopting finite-element method and the effect of temperature was calculated with model,and calculation result was analysed and compared with measured value.Research results:The regularity of internal temperature field of structure was analysed in this paper.The result showed uneven temperature difference of sunshine and so on had large effect on the structure of cable-stayed bridge,and proved the result obtained by this method was rather identical with the practice.Research conclusions:The temperature effect on control of construction of cable-stayed bridge could be calculated correctly by the method presented in this paper,which was helpful for adjusting the line figuration and stress of main girder so as to make them meeting the requirement of reliability.