The Analysis of Impact Coefficient on Reinforced-Concrete Bridge

Abstract:

In order to discuss the displacement impact coefficient of the simply supported beam bridge, reinforced-concrete simply supported beam models with different span and different section stiffness are set up using the finite element method in the paper. The maximum dynamic displacement of beam models under the running vehicle is calculated. Combined with the maximum static displacement, the corresponding impact coefficients of models are calculated. At the same time, the modal analysis of beams is conducted to calculate the impact coefficient based on the base frequency. From comparing with the displacement impact coefficient, the bridge spans and section stiffness influence on impact coefficient is analyzed. Results show that the influence of section stiffness on impact coefficient can be ignored, but the influence of the change of span cannot be ignored. It will provide a reference for designing and detection technology of reinforced-concrete simply supported beam.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 786-789
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.786
• Online since: October 2012
• Authors: Chun Xiang Qi, Fei Xia, Run Feng Zhang
• Keywords: Bridge Characteristic, Dynamic Analysis, Impact Coefficient, Reinforced Concrete (RC) Beam, Static Analysis

References

[1] Ministry of communications of the people's Republic of China. JTG D 60-2004 General Code for Design of Highway Bridges and Culverts [s]. Beijing : People's transportation press , 2004 .

[2] Wang Haicheng, Shi Shangwei . Analysis of Bridge Impact Coefficient Influence Factor and the Deviation Formation[J]. Journal of Chongqing Jiaotong University ( Natural Science Edition ) , 2007, 26(5): 25－28.

[3] Wang Xiejun, Zhang Wei. The Analysis of Dynamic Impact Coefficient of Bridge under car load [J] . Journal of Vibration and Shock , 2007，26(6)：125－128.

[4] Li Longhai, Zhang Xianmin. Experimentation Analysis of Relation Between Impact Factor and Bridge Floor Roughness [J] . Journal of Civil Aviation University of China , 2009，27(1)：14－18.

[5] Wang Guichun, Pan Wenwu. The Analysis of Coordination Conditions in Railway Bridge and Vehicle Dynamic Interaction[J] . Railway Construction , 2006(12)：1－3．