Calculation of Creep Effect of Extradosed Cable-stayed bridge based on Midas Civil

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Shi, Jing-Xian^1 ; Ran, Zhi-Hong^2

Oxbridge College, Kunming University of Science and Technology, KunMing, Yunnan

650106, China^1

Yunnan University, KunMing, Yunnan

650106, China^2

关键词: Absolute values;    Concrete creep;    Continuous rigid frame bridges;    Displacement and stress;    Extradosed bridge;    Extradosed cable-stayed bridges;    Safety coefficient;    Yunnan province;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012113/pdf
DOI  :  10.1088/1757-899X/423/1/012113

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In order to understand the creep effect of Extradosed bridge, the paper adopted four concrete creep calculation models recommended by Chinese, European, American and Japanese specifications, Taking the first concrete Extradosed cable-stayed bridge under operation in Yunnan Province of China as an example, The effect of creep on the displacement and stress of the main beam, and the Cable Tension were calculated. The results show that as for the impact of creep effect on deflection of the main beam of the Extradosed cable-stayed bridge, the absolute value is smaller than that of the continuous rigid-frame bridge with the same span, but it has a relatively great impact on the stress and cable force. This article is proposed that as reserve of stress at the lower edge of the section in non-stayed cable segment area should be increased appropriately, and the safety coefficient of stay cables at the operating stage can be properly increased, and the value recommended by this article is 1.87