Jointless Concrete Bridges – Development of a Flexible Abutment
|Conference:||IABSE Symposium: Improving Infrastructure Worldwide, Weimar, Germany, 19-21 September 2007|
|Published in:||Improving Infrastructure Worldwide|
|Total no. of pages:||7|
For bigger concrete bridges the jointless construction hasn’t been established up to now. Concerns regarding the durability still exist since constraint stresses as a result of temperature alterations and shrinkage lead to crack initiation. With the use of the new flexible abutment these restraint stresses and occurring cracks can be reduced significantly. An efficient decoupling of abutment and subsoil is reached by introducing a buffer layer of polystyrene and a geogrid reinforced backfill. Full size tests and non linear calculations show that only little deformations arise at the backfill material.
abutment conceptual design jointless bridge constraint stresses