Research on Mechanical Property of Asymmetric Composite Girder Bridge of Combined Rigid Frame and Continuous Girder System

被引：0
|
作者：
Yang X. [1 ]
Liu Q. [1 ]
Zhu Y. [1 ]
机构：
[1] CCCC Second Highway Consultants Co., Ltd., Wuhan
来源：
Bridge Construction | 2023年 / 53卷
关键词：
asymmetric proportion coefficient; asymmetric rigid frame and continuous girder combined system; composite damping bearing system; finite element method; horizontal equivalent stiffness; lateral wind load; mechanical property;
D O I：
10.20051/j.issn.1003-4722.2023.S1.007
中图分类号：
学科分类号：
摘要：
Tine study focuses On the design and application of tine asymmetric composite girder bridge of combined rigid frame and continuous girder system. Rased on tbe Changtouhe River Bridge of the Second Chongqing-Hunan Expressway, the asymmetric proportion coefficient is introduced to study the effect of asymmetric extent on the mechanical property of the asymmetric composite girder bridge of combined rigid frame and continuous girder system. It is proposed to install damping support systern at the piers supporting the girders in the continuous spans so as to address the unfavorable load bearing condition of the girders over these piers under lateral wind loads. With main span lengths of 180 m, the portion of the lengths of girders flanked the rigid frame and continuous span is adjusted, and 10 finite element models of composite girder bridges of combined rigid frame and continuous girder system were built up with different asymmetric proportion coefficients, to analyze the internal forces of main girder and reaction forces at supports under the influence of dead loads, vehicle loads, thermal loads and concrete shrinkage and creep. And the impact of horizontal equivalent stiffness of composite damping bearings on the load bearing behavior of the main girder was analyzed as well. The results show that the asymmetric extent of the asymmetric composite girder bridge of combined rigid frame and continuous girder system exerts the most intensive effect on the concrete shrinkage and creep of main girder. To increase the girder depth at piers in the continuous spans and enlarge the lengths of the small side spans arc a good way to reduce the adverse impact of asymmetry, the maximum value of the asymmetric proportion coefficient is suggested to be 0. 3. To use composite damping bearings at piers in the continuous spans and using damping displacement to adjust the deformation of the main girder can effectively reduce the bending moment and stress range of the main girder induced by lateral wind loads. © 2023 Wuhan Bridge Research Institute. All rights reserved.
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页码：46 / 53
页数：7
相关论文
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  • [1] ZHOU Jun-sheng, LOU Zhuang-hong, The Status Quo and Developing Trends of Large-Span Prestressed Concrete Bridges with Continuous Rigid Frame Structure, China Journal of Highway and Transport, 13, 1, pp. 31-37, (2000)
  • [2] ZHENG Guo-fu, PENG Wei, Design and Study of Curvature Radius and Short Piers, Bridge Construction, 50, pp. 94-98, (2020)
  • [3] ZHANG Yong-liang, WANG Yun, CHEN Xing-chong, Et al., Analysis of Parameters Having Influence on Seismic Responses of Continuous Rigid-Frame Bridges with Double Thin-Wall Piers[J], Bridge Construction, 48, 4, pp. 17-21, (2018)
  • [4] CHENG Zhi-you, QIAN Ji, CHEN Xin, Et al., Dynamic Characteristics and Anti-Seismic Analysis of Continuous Rigid Frame Bridge with High and Low Piers, Railway Engineering, 58, 7, pp. 18-21, (2018)
  • [5] QU Chun-sheng, LU Cong-fei, PENG Yun-dong, Discussion on Design Idea of Long-Span Continuous Rigid Frame Bridge in Mountainous Area, Highway, 62, 11, pp. 88-80, (2017)
  • [6] LIN Cheng, YAN Ai-guo, LIAO Zu-jiang, Design of a Continuous Rigid-Frame Bridge with High-Rise Piers on Railway Connecting Yichang to Zhengzhou-Wanzhou Railway, World Bridges, 48, pp. 52-56, (2020)
  • [7] DU Jun, WENG Fang-wen, Study of Construction Schemes for Pour Strips over Junction Piers in Bearing-Free Rigid-Frame Bridge with Multiple Continuous Units, World Bridges, 49, 6, pp. 46-51, (2021)
  • [8] ZHANG Yang, Design of Rigid-Frame and Continuous-Beam Combination Bridge with Long-Span and High-Pier, Railway Standard Design, 4, pp. 79-82, (2012)
  • [9] CHENHuai, CHEN Peng-fei, LI Jie, Study on Key Technology of the Main Girder Closure of Rigid Frame-Continuous Combination Beam Bridge, Journal of Railway Science and Engineering, 12, 1, pp. 113-118, (2015)
  • [10] REN Xiang, YU Xing, WANG Lu, Et al., A Study on the Thrust Force of Middle-Span Closing of Continuous Rigid Frame Bridge with Asymmetric High Piers, Journal of Highway Engineering, 47, 1, pp. 1-6, (2022)
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