Numerical Methods for Geometric Nonlinear Dynamic Analysis of Suspension Bridges Under Earthquake

A reliable numerical procedure is proposed for the geometric nonlinear dynamic analysis of suspension bridges subjected to earthquake excitations. The geometric nonlinearities of cable members are captured by the catenary element derived from exact analytical expressions of elastic catenary, while t...

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Bibliographic Details
Published in:Journal of earthquake engineering : JEE 2023-04, Vol.27 (6), p.1355-1382
Main Authors: Han, Qinghua, Wu, Chao, Liu, Mingjie, Wu, Hao
Format: Article
Language:English
Subjects:
Aquatic reptiles
Catenaries
Catenary
catenary cable element
Dynamic analysis
Earthquakes
Equations of motion
Finite element method
geometric nonlinear analysis
Geometric nonlinearity
Iterative methods
Iterative solution
Mathematical analysis
Mathematical models
Newton-Raphson method
nonlinear beam element
Nonlinear dynamics
Nonlinear equations
Numerical methods
Procedures
Seismic activity
Seismic response
static and dynamic analysis
Suspension bridge
Suspension bridges
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Summary:A reliable numerical procedure is proposed for the geometric nonlinear dynamic analysis of suspension bridges subjected to earthquake excitations. The geometric nonlinearities of cable members are captured by the catenary element derived from exact analytical expressions of elastic catenary, while the geometric nonlinearities of tower and girder members are predicted by nonlinear beam element which can undergo large deflections and rotations. An incremental-iterative solution based on Newmark-β direct integration and Newton-Raphson iteration is adopted for solving the nonlinear equation of motion. The results are compared with those generated by ANSYS to show the accuracy and efficiency of the proposed procedure.
ISSN:1363-2469
1559-808X
DOI:10.1080/13632469.2022.2074920