Identification Method for Moving Loads over Continuous Beam Based on Bending Moment Influence Lines

Abstract:

Vehicle axle loads are modeled as moving loads and bridge is considered as a continuous beam. Based on the modal superposition theory, the model accelerations can be obtained from the accelerations of the bridge at several sections. Then based on the d’Alembertian theory, the inertia force of the bridge can be expressed approximately. Using the bending moment influence lines, the equations about flexural moment and moving force is obtained. Using the formulas, the moving force can be obtained at any time. Examples show that the method has high accuracy in identifying varying time moving force as well as constant moving force. This method has highly efficiency and appropriate to applying in engineering.

• Periodical: Applied Mechanics and Materials (Volumes 638-640)
• Pages: 1079-1084
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.638-640.1079
• Online since: September 2014
• Authors: Chang Zhao Qian*, Chang Ping Chen, Yong Gang Xiao
• Keywords: Continuous Beam, Influence Line, Modal Superposition Theory, Moving Loads Identification

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