Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32727
Sensitivity Parameter Analysis of Negative Moment Dynamic Load Allowance of Continuous T-Girder Bridge

Authors: Fan Yang, Ye-lu Wang, Yang Zhao

Abstract:

The dynamic load allowance, as an application result of the vehicle-bridge coupled vibration theory, is an important parameter for bridge design and evaluation. Based on the coupled vehicle-bridge vibration theory, the current work establishes a full girder model of a dynamic load allowance, selects a planar five-degree-of-freedom three-axis vehicle model, solves the coupled vehicle-bridge dynamic response using the APDL language in the spatial finite element program ANSYS, selects the pivot point 2 sections as the representative of the negative moment section, and analyzes the effects of parameters such as travel speed, unevenness, vehicle frequency, span diameter, span number and forced displacement of the support on the negative moment dynamic load allowance through orthogonal tests. The influence of parameters such as vehicle speed, unevenness, vehicle frequency, span diameter, span number, and forced displacement of the support on the negative moment dynamic load allowance is analyzed by orthogonal tests, and the influence law of each influencing parameter is summarized. It is found that the effects of vehicle frequency, unevenness, and speed on the negative moment dynamic load allowance are significant, among which vehicle frequency has the greatest effect on the negative moment dynamic load allowance; the effects of span number and span diameter on the negative moment dynamic load allowance are relatively small; the effects of forced displacement of the support on the negative moment dynamic load allowance are negligible.

Keywords: Continuous T-girder bridge, dynamic load allowance, sensitivity analysis, vehicle-bridge coupling.

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 264

References:


[1] Zhou Yong-jun, Xue Yu-xin, et al. State-of-the-art of Theory and Applications of Bridge Dynamic Load Allowance (J). China Journal of Highway and Transport, 2021, 34(04): 31-50.
[2] Deng L, He W, Shao Y. Dynamic Impact Factors for Shear and Bending Moment of Simply Sup-ported and Continuous Concrete Girder Bridges (J). Journal of Bridge Engineering,2014, 20 (11):04015005.
[3] Deng L, Cai C S. Development of dynamic impact factor for performance evaluation of existing multi-girder concrete bridges (J). Engineering Structures, 2010, 32(1):21-31
[4] Wang TL, Huang D. Cable‐Stayed Bridge Vibration due to Road Surface Roughness (J). Journal of Structural Engineering, 1992,118(5): 1354-1374.
[5] Deng Lu, He Wei, Yu Yang, et al. Research Progress in Theory and Applications of Highway Vehicle-bridge Coupling Vibration (J). China Journal of Highway and Transport, 2018, 31(7): 38-54.
[6] Wu Ming-han, Gui Shui-rong, Chen Shui-sheng. Comparison of impact factors for four models crossing T-type rigid (J). Journal of China & Foreign Highway, 2008, 28(6):130-133.
[7] Zhou Yong-jun, Zhao Yang, Zhao Yu, et al. A study on dynamic load allowance of a simply supported girder bridge based on load efficiency of a dynamic load test (J). Journal of Vibration and Shock, 2021, 40(20): 207-216.
[8] Chang D, Lee H Y. Impact Factors for Simple-span Highway Girder Bridges (J). Journal of Structural Engineering,1994, 120(3):704-715.
[9] Li H Y, Wekezerj, Kwasniewski L. Dynamic Response of a Highway Bridge Subjected to Moving Vehicles (J). Journal of Bridge Engineering, 2008, 13(5):439-448.
[10] Zhu Jin-song, XU Yu-feng. Research on the impact factor of the three-span continuous beam-arch combined bridge based on the vehicle-bridge coupled vibration (J). Journal of Railway Science and Engineering, 2019,16(4):959-967.
[11] Deng Lu, WNG Wei. Research progress om Dynamic Impact Factors of Highway Bridge (J). Journal of Dynamics and Control, 2016, 14 (04):289-300.
[12] Zhou Xiao-qing, Sun Li-jun. Relationship between International Roughness Index and Velocity of Quarter Car (J). Journal of Tongji University (Natural Science), 2005, 33(10): 47-51.
[13] Han Wan-shui, Wang Tao, Li Yong-qing, et al. Analysis System of Vehicle-bridge coupling Vibration with Grillage Method Based on Model Updating (J). China Journal of Highway and Transport, 2011, 24(05): 47-55.