SHOCK TRANSMISSION UNITS FOR BRIDGE DESIGN, CONSTRUCTION AND STRENGTHENING

This article describes a shock transmission unit which is simple, maintenance-free and relatively inexpensive and which uses a silicone putty compound instead of oil in its cylinder. Under slow movement, the putty is squeezed slowly around the piston and displaced from one end of the cylinder to the other, but the putty becomes rigid under impact. Thus a bridge structure can move slowly due to expansion or contraction of members caused by normal diurnal environmental temperature variations but can also transmit large shock or impact forces applied over a few seconds. Examples are given of the use of shock transmission units in multispan bridge deck articulation eliminating the need for movement joints over piers. Earthquake resistance can be achieved by providing a fixed pier connection during impact. Sections in existing viaducts can be linked to distribute longitudinal faces to all piers. Other applications could include their use on attachments for typhoon or hurricane gust loading mounted both longitudinally and vertically. The units could also be used in energy absorbing protective barriers and force transmission elements for piers at risk from ship, train or vehicle impacts.

  • Availability:
  • Corporate Authors:

    Palladian Publications Limited

    14 Park Street
    Windsor, Berkshire,   England 
  • Authors:
    • Pritchard, B
  • Publication Date: 1989-10

Language

  • English

Media Info

  • Pagination: p. 18-20
  • Serial:
    • CONSTRUCTION REPAIR
    • Volume: 3
    • Issue Number: 7
    • Publisher: PALLADIAN PUBLICATIONS LTD
    • ISSN: 0967-0726

Subject/Index Terms

Filing Info

  • Accession Number: 00606126
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1991 12:00AM