The Simplified Model and the Critical Angle of the Curved Bridges with Multi-Dimensional Earthquake Excitation

Abstract:

The existing methods of curve beam bridge is the finite element method, the modeling and analysis of complex, heavy workload, not suitable for the proposed design method of regularity. According to the character of curved bridge, the bridge superstructure and piers is simplified as packing quality model that have two levels of degrees of freedom and a surrounding mass center shaft torsion degree of freedom, then the analysis model of double mass simplified 6 degrees of freedom is established, studying the dynamic characteristics and the structure vibration behavior through the dynamics equation of curved bridges. Example show that,the results of double mass model with the traditional of finite element model is consistent, double mass model has simple calculation method and can consider the influence of sensitive factors, with the help of programming is more suitable for the proposed design method of regularity. At last, Application MATLAB programming discussed the critical angle of the curved bridges under multi-dimensional earthquake based on double mass model, after change the curve bridge related parameters only one operation can achieve the most disadvantaged angle.

• Periodical: Advanced Materials Research (Volumes 1065-1069)
• Pages: 1518-1524
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.1518
• Online since: December 2014
• Authors: Xi Mei Li, Yong Feng Du
• Keywords: Critical Angle, Curved Bridge, Double Mass Model, Dynamic Response, Earthquake Excitation

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