Calculation methods of pylon eccentricity magnifiedcoefficient of Changtai Yangtze River Bridge(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2021年3期
- Page:
- 42-51
- Research Field:
- 桥梁与隧道工程
- Publishing date:
Info
- Title:
- Calculation methods of pylon eccentricity magnifiedcoefficient of Changtai Yangtze River Bridge
- Author(s):
- HUANG Qiao1; HUANG Yili1; ZHENG Qinggang2; SONG Xiaodong1; ZHENG Xing1; ZHANG Jintao2
- (1. School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China; 2. China RailwayMajor Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan 430056, Hubei, China)
- Keywords:
- bridge engineering; comparison of calculation method; finite element; eccentricity magnified coefficient; cablestayed bridge pylon
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to explore the applicability of the specification in calculating the eccentricity magnified coefficient of the spatial diamondshaped pylon, and ensure the rationality of reinforcement design for pylon of the longspan cablestayed bridge, the Changtai Yangtze River Bridge was taken as an example, calculates and analyzes the eccentricity magnified coefficients of its pylon. First, the control sections and calculation conditions of the pylon were determined based on the completion state of Changtai Yangtze River Bridge, and the calculating length coefficients in different specifications were compared and studied. Second, eccentricity magnified coefficients of pylon columns were calculated based on finite element analysis and bridge design specifications of China, US, Europe. Last, comparisons between finite element results and specification results were conducted. The results show that since the boundary conditions of the pylon of Changtai Yangtze River Bridge are not clear, there are certain differences between the values of parameter and the actual situation when eccentricity magnified coefficients are calculated using specifications, it is not appropriate to consider the pylons as simple components. Due to the bridge specifications of China, US and Europe adopt different calculation methods in determining the eccentricity magnified coefficient, and the parameters and their values in specification formulas are different, there is a big difference in each columns eccentricity magnified coefficient calculated based on different specifications. Due to different constraints and different slenderness ratios, the specification results of the middle pylon column are larger than finite element results, the specification results of upper and lower columns calculated according to different specifications have different trends. Therefore, when designing similar complex pylon, its recommended to use finite element methods to get the eccentricity magnified coefficient, so as to exclude the influence of test conditions on specification formulas, and the results based on specifications can be used as an auxiliary verification method to ensure the rationality of pylons reinforcement design. 9 tabs, 3 figs, 24 refs.
Last Update: 2021-06-04