CENTRAL HINGE BEARINGS AND EXPANSION FOR BALANCED CANTILEVER BRIDGE ACROSS RIVER GANGA AT VARANASI

Although bridge accessories, such as bearings and expansion joints, cost only about 1-2% of the total cost of a bridge project, they play a vital part in the structure's trouble-free performance. This paper discusses solutions to the problem of poor connection between the cantilever ends of balanced cantilever bridges, due to angle break and vertical and lateral displacements under different loading conditions. Cast steel central hinge bearings of line contact type have caused problems in several cases; this has led to poor riding quality and high amplitude vibrations and impact, resulting in damage to the junction and its bearings. Similarly the expansion joints of some large bridges have been damaged by large multi-directional complex movements. The paper briefly considers how these problems were addressed for the new Ganga Bridge at Varanasi, India. The Indian Ministry of Surface Transport decided to install there plane contact type central hinge bearings with pressure pad assembly, and swivel joist expansion joints. The joints cater for anticipated complex longitudinal, lateral, vertical, and radial movements and rotations. The paper describes these components in some detail, and describes the quality control systems used in the manufacture of some of them.

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  • Corporate Authors:

    Indian Roads Congress

    Jamnagar House, Shahjahan Road
    New Delhi,   India  110 011
  • Authors:
    • Gupta, A
    • KANT, K
  • Publication Date: 1998-5

Language

  • English

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Filing Info

  • Accession Number: 00769919
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Oct 7 1999 12:00AM