دانلود Assessment and Retrofit of the Bridge over Kouris River, Cyprus

Abstract

The  main  objective  of  the  present  study  is  the  assessment  and  retrofit  of  an existing road bridge that is located in Cyprus over the river Kouris. In particular the study concerns in a road bridge with seven spans of 10.5 m + 5 * 12.6 m  +  10.5  m,  a  cross  section  width  of  7.10  m  and  a  5  m  piers  height  that  was constructed in the early 50’s. The structural system of the bridge comprises of cast  in  situ  reinforced  concrete  T-beams  and  slab  deck  that  is  simply  supported  on  masonry  piers.  According  to  the  new  urban  plan  to  design  the bridge  should  now  accommodate  two  lanes  per  direction,  a  pedestrian  walkway and a cycling lane with total cross section width of new deck 15.60 m. The deck of the bridge widened using for aesthetic reasons the same cross section type and the new T-Beams and slab deck connected monolithically to the existing  one.  The  existing  part  of  the  deck  was  strengthened  with  reinforced concrete  jacketing  due  to  inadequacy  in  shear  resistance.  Major  challenge  of the  project  posed  the  existing  masonry  pier  layout  that  was  insufficient  to carry  the  new  design  seismic  forces.  New  piers,  founded  on  piles,  were  designed adjacent to the existing piers in order to support the new widened part of the bridge, and also to bear all the horizontal loads arising from the masses of  the  total  deck.  Sliding  bearings  (free  movement)  placed  in  the  part  of  the bridge over the existing piers and elastomeric bearings with movement only in the longitudinal direction placed in the new piers.