the effect of soil improvement on integral-abutment bridge’s displacement

in this paper, soil improvement works by means of compaction method performed for the soil that have effect in integral-abutment bridge’s displacement. the main issue related to the analysis of this type of bridges is dealing with soil-structure interaction of the abutments and the supporting piles. various soil constitutive models have been used in studies of soil-structure interaction in this kind of bridges by researchers. emphasis is placed on integral abutment behavior, since abutments together with piers are the most critical elements in securing the integrity of bridge superstructures. with improving the soil behind of the bridge, the displacement of the bridge can be reduced and it can help the bridge to performs better. the behaviour of the soil can be studied in plaxis since plaxis may show the results in many ways such as patterns for displacements, moment- and force distributions, the stresses in the soil. the purpose of this paper is to investigated the influence of dry density of various soils that be gained from compaction, in longitudinal and transverse displacements. the bridge’s results that used in this paper are from a skewed pc girder integral-abutment bridge in the state of iowa were instrumented over a two-year period to measure structural behavior.