Dynamic behavior of horizontally curved I-girder bridges

Abstract The purpose of this paper is to investigate the dynamic behavior of horizontally curved I-girder bridges due to one or two trucks (side by side) moving across rough bridge decks. The bridge is modeled as a planar grillage beam system composed of horizontally curved beam elements and straight beam elements. Warping torsion is taken into consideration in the analysis. The analytical vehicle is simulated as a nonlinear vehicle model with 11 independent degrees of freedom according to the HS20–44 truck design loading contained in the American Association of State Highway and Transportation Officials (AASHTO) specifications. Four different classes of road surface roughness generated from power spectral density function for very good, good, average, and poor roads are used in the study. The analytical results are very significant and show that the dynamic behavior of curved I-girder bridges is quite different from that of straight girder bridges. The impact factors of bending and shear for inside girders of curved I-girder bridges are significantly smaller than those for outside girders.

[1]  Ton-Lo Wang,et al.  Impact in Railway Prestressed Concrete Bridges , 1986 .

[2]  Ton-Lo Wang,et al.  Impact in highway prestressed concrete bridges , 1992 .

[3]  Ton-Lo Wang,et al.  Impact analysis of cable-stayed bridges , 1992 .

[4]  H. Yonezawa.  Moments and Free Vibrations in Curved Girder Bridges , 1962 .

[5]  Ton-Lo Wang,et al.  Ramp/Bridge Interface in Railway Prestressed Concrete Bridge , 1990 .

[6]  Dongzhou Huang,et al.  Cable‐Stayed Bridge Vibration due to Road Surface Roughness , 1992 .

[7]  Chen Pang Tan,et al.  Response of Horizontally Curved Bridge to Moving Load , 1968 .

[8]  D. M. Brotton,et al.  Technical note: Horizontally curved beam finite element including warping , 1976 .

[9]  Chen Pang Tan,et al.  DYNAMIC RESPONSE OF A HORIZONTALLY CURVED BRIDGE , 1968 .

[10]  Ton-Lo Wang,et al.  DYNAMIC RESPONSE OF MULTIGIRDER BRIDGES , 1992 .

[11]  Tseng Huang,et al.  Dynamic Response of Three-Span Continuous Highway Bridges , 1960 .

[12]  Baidar Bakht,et al.  The grillage analogy in bridge analysis , 1982 .

[13]  Chai Hong Yoo,et al.  Analysis and Design of Curved Steel Bridges , 1988 .

[14]  M. A. Sahin,et al.  EVALUATION OF IMPACT FACTORS FOR HORIZONTALLY CURVED STEEL BOX BRIDGES , 1992 .

[15]  Sidney Shore,et al.  Dynamic Analysis of Horizontally Curved I-Girder Bridges , 1977 .

[16]  Charles G. Culver.  Natural Frequencies of Horizontally Curved Beams , 1967 .

[17]  Guohao Li,et al.  Analysis of Box Girder and Truss Bridges , 1988 .

[18]  Ton-Lo Wang,et al.  Impact Studies of Multigirder Concrete Bridges , 1993 .

[19]  Ton-Lo Wang,et al.  Impact Analysis of Continuous Multigirder Bridges due to Moving Vehicles , 1992 .

[20]  J. D. Robson,et al.  The description of road surface roughness , 1973 .

[21]  William L. Armstrong.  Dynamic Testing of Curved Bridge — Huyck Stream , 1972 .

[22]  Robert J. Reilly.  Stiffness Analysis of Grids Including Warping , 1972 .

[23]  R. Clough,et al.  Dynamics Of Structures , 1975 .