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Structural Engineering and Mechanics
  Volume 8, Number 1, July 1999 , pages 85-102

The use of eccentric beam elements in the analysis of slab-on-girder bridges
Chan THT, Chan JHF

    With the advent of computer, the finite element method has become a most powerful numerical method for structural analysis. However, bridge designers are reluctant to use it in their designs because of its complex nature and its being time consuming in the preparation of the input data and analyzing the results. This paper describes the development of a computer based finite element model using the idea of eccentric beam elements for the analysis of slab-on-girder bridges. The proposed method is supported by a laboratory test using a reinforced concrete bridge model. Other bridge analytical schemes are also introduced and compared with the proposed method. The main aim of the comparison is to prove the effectiveness of the shell and eccentric beam modelling in the studies of lateral load distribution of slab-on-girder bridges. It is concluded that the proposed finite element method gives a closer to real idealization and its developed computer program, SHECAN, is also very simple to use. It is highly recommended to use it as an analytical tool for the design of slab-on-girder bridges.
Key Words
    bridge deck analysis, eccentric beam model, finite element methods, grillage analogy method, lateral load distribution, rigid link element, semi-continuum method, slab-on-girder bridge
Chan THT, Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong
Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong

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