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| Practical Calculation Method for the Overall Stability of High-pier Rigid Frame Bridges Considering the Effect of Tie Beams |
| LAN Shuwei1, ZHOU Donghua2, CHEN Xu1, WANG Daohang2 |
1. Kunming University, Kunming, Yunnan 650214, China;
2. Kunming University of Science and Technology, Kunming, Yunnan 650500, China |
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Abstract Research purposes: Tie beams are often installed between the columns of high-pier rigid frame bridges. Currently, the calculation of the overall stability of high-pier rigid frame bridges mainly includes the calculation length coefficient method and the finite element method. The calculation length coefficient method for each component checking cannot consider the influence of different tie beam segments between the bridge piers. As the calculation theory and method are implicit in software, how to verify the accuracy and reliability of the calculation results in the finite element method is a difficult problem that must be solved. Therefore, based on force characteristics of the rocking column in this paper, the second-order calculation for solving the overall stability critical bearing capacity of high-pier frame bridges is transformed into the first-order problem to determine the overall lateral stiffness of structures through the concept of structural conversion.
Research conclusions: (1) A calculation method for the critical force of the overall stability of high-pier rigid frame bridges is provided by calculating the structural lateral stiffness in this paper. (2) This paper provides a calculation formula for the critical force of the overall stability of column-typed high-pier rigid frame bridges. This formula can consider the influence of beam ties between column piers, compensate for the shortcomings of the standard calculation length coefficient method, and has good accuracy and precision. It can provide an analytical verification method for checking the reliability of the overall stability of the finite element calculation results. (3) The research results can be used for bridge engineering design and theoretical calculations.
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Received: 24 August 2022
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2024, Vol. 41 
