MOHAMMAD HADI ALIZADE - Assistant professor of civil Engineering , Roudehen Islamic Azad University, Iran
SEYED MAHDI PEYMAEI SEMNANI - Department of Civil Engineering, Roudehen Islamic Azad University, Iran

Integral bridges are gaining increased popularity because of both economic and fast construction associated with the omission of bearing supports and expansion joints. However, design provisions vary widely and few design codes specifically address IAB requirements . In light of the wide variation in design concepts and assumptions, it is not surprising that there are many recommended methods to account for the resulting soil–structure interaction in an IAB. Unfortunately, design concepts do not always correspond to realized bridge movements and deformations and often lead to conservatism in design. This paper reports on the development of numerical modeling methodologies formulated experiment data from The Guthrie County Bridge, which is located just south of the Town of Panora , Iowa on Route P28 where the highway crosses the Middle Raccoon River. The proposed numerical modeling methodologies are practical and reasonably predict the displacement of the bridge under different soil friction . we use Interpolation and Curve Fitting with MATLAB software to predict a formulas that can be trusted .

Integral abutment , Numerical model , Interpolation and Curve Fitting , MATLAB