Dynamic Properties of Long-span Steel-concrete Composite Bridges with External Tendons
WANG Wei-an1, LI Qiao1, ZHAO Can-hui1, ZHUANG Wei-lin2
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
2. Highway Design & Research Institute, Sichuan Provincial Transport Department, Chengdu Sichuan 610041, China
Abstract The dynamic performance of large-span steel-concrete composite bridges with external tendons is investigated by deriving the formula of equivalent damping ratio of composite bridges, and by analyzing the influence of shear connectors stiffness of composite girders, interface slip, external tendons, and pile-soil dynamic interactions on the dynamic properties of steel-concrete composite bridge. Finite element calculations indicate that the equivalent damping ratio has significant influence on the dynamic response while the shear stiffness of grouped stud shear connectors and the prestressed levels of external tendons have different but relatively smaller influence on the free vibration frequency of long-span composite bridges; the influence of pile-soil interaction on the structural dynamic response of the composite bridge is clear.
WANG Wei-an,LI Qiao,ZHAO Can-hui, et al. Dynamic Properties of Long-span Steel-concrete Composite Bridges with External Tendons[J]. Journal of Highway and Transportation Research and Development, 2013, 7(4): 30-38.
[1] TAO Mu-xuan, NIE Jian-guo. Nonlinear Finite Element Analysis of Prestressed Continuous Steel Concrete Composite Beams[J]. China Civil Engineering Journal, 2011, 44(2):8-20. (in Chinese)
[2] QI Jing-jing, JIANG Li-zhong, ZHANG Chuan-zeng, et al. Effects of Interface Slip, Vertical Uplift and Shear Deformation on Dynamic Behavior of Steel-Concrete Composite Continuous Beams[J]. Journal of Central South University:Science and Technology Edition, 2010, 41(6):2334-2343. (in Chinese)
[3] WANG Hai-yang, LI Liang-liang. Dynamic Performance Analysis of Simple Beam with External Prestressing Force[J]. Journal of Highway and Transportation Research and Development, 2006, 23(1):70-73. (in Chinese)
[4] LÜ Xi-lin, ZHANG Jie. Damping Behavior of Vertical Structures with Upper Steel and Lower Concrete Components[J]. China Civil Engineering Journal, 2012, 45(3):10-16. (in Chinese)
[5] HUANG Ben-cai. Equivalent Damping Ratios of Vibration in Composite Structures[J]. Shanghai Mechanics, 1998, 19(2):141-145. (in Chinese)
[6] ZHU Jing-qing. On the Two Basic Problems of Complex Damping Theory[J]. Acta Mechanica Solida Sinica, 1992,13(2):113-118. (in Chinese)
[7] OLLGAARD J G, SLUTTER R G, FISHER J WE. Shear Strength of Stud Connectors in Lightweight and Normal-Weight Concrete[J]. AISC Engineering Journal, 1971(4):55-68.
[8] Eurocode 4:ENV1994-2, Design of Composite Steel and Concrete Structures, Part 2:Bridges[S].
[9] OKADA J, YODA T, LEBET J P. A Study of the Grouped Arrangements of Stud Connectors on Shear Strength Behavior[J]. Structural Engineering/Earthquake Engineering, JSCE, 2006, 23(1):75-89.
[10] SHIM C S, PARK J S, JEON S M, et al. Experimental Study on Group Stud Shear Connection[C]//LIEW R, CHOO Y S. Proceedings of 5th International Conference on Advances in Steel Structures. Singapore:[s.n.], 2007:932-937.
[11] HOU Wen-qi, YE Mei-xin. Analysis on the Ultimate Bearing Capacity and the Statistical Behavior of the Composite Structures with Grouped Studs in Railway Bridge[J]. China Railway Science, 2011, 32(1):55-61. (in Chinese)
[12] ARIYAWARDENA N D, GHALI A. Design of Precast Prestressed Concrete Members Using External Prestressing[J]. PCI Journal, 2002, 47(2):84-94.
[13] SIVALEEPUNTH C, NIWA J, BUI K D, et al. Prediction of Tendon Stress and Flexural Strength of Externally Prestressed Concrete Beams[J]. Journal of JSCE (E), 2006, 62(1):260-273.
[14] LI Xiao-zhen, LIU Xiao-han, LIU De-jun. Coupled Vibration Analysis of a Railway Continuous Rigid-frame Bridge and Vehicles with Soil-structure Interaction[J]. Journal of Vibration and Shock, 2011, 30(12):54-58. (in Chinese)
[15] SUN Li-min,ZHANG Chen-nan.PAN Long,et al. Lumped-mass Model and Its Parameters for Dynamic Analysis of Bridge Pier-pile-soil System[J]. Journal of Tongji University, 2002, 30(4):409-415. (in Chinese)
[16] JIANG Tong, TAJIMI H. Analysis Method of Foundation-structure Dynamic Interaction[M]. Shanghai:Tongji University press, 2009:180-188. (in Chinese)
[17] LI Wei-wei,LIU Wei-qing,WANG Shu-guang, et al. Response Spectrum Analysis of Pile-soil-structure Interaction Based on Simulink[J]. World Earthquake Engineering, 2012, 28(1):103-111. (in Chinese)
[18] JTG/T B02-01-2008, Guidelines for Seismic Design of Highway Bridges[S]. (in Chinese)