INTEGRAL BRIDGE DESIGN IS ON THE RISE

Integrated bridge construction is increasingly becoming the answer to joint related bridge damage caused by the use of deicing chemicals and the restrained growth of rigid pavements. Bridges without deck joints have performed more effectively since they remain in service for longer periods of time with only moderate maintenance and occasional repairs. It has been found that while integral bridge construction causes some secondary stresses, more damage and distress has been caused by the use of deck joints. Also, the elimination of costly bearings, and the details and procedures necessary to permit their use, generally result in more economical bridges. Details of integral abutments are discussed. Transportation departments are beginning to retrofit existing multiple span bridges from simple to continuous span.