1
Civil Engineering group, ,Binaloud University of Mashhad
2
Civil Engineering group, Ferdowsi University of Mashhad
Abstract
Expansion joints and sliding bearings in conventional bridges eliminate the forces in deck cause by temperature fluctuation. The deck in an integral bridge is integrated with abutments, and expansion joints and sliding bearings eliminated. With elimination of expansion joints and sliding bearings, the associated problems with them will eliminate. But there are also problems with integral abutment bridges. In integral bridges, the expansion and contraction of deck causes many geotechnical problems in backfill soil behind abutments. In summer, when the temperature is high, the expansion of deck moves abutments toward the backfill soil. This relative displacement between abutments and backfill soil results in increasing pressure behind abutments in backfill soil. The cyclic moving during expansion and contraction, also leads to growing lateral earth pressure in backfill soil. The amplitude of wall displacement has a great effect on lateral soil coefficient and soil settlements. Three different magnitudes of normalized wall displacements δ/H = 0.2%, 0.6%, 1% selected during this research and evaluated. The results showed that by increasing in normalized wall displacements (δ/H) the settlement and peak lateral soil coefficient (Kpeak) of soil behind the wall meaningfully amplified. Also the results of tests in comparison with some existing manuals for integral bridges showed that the lateral soil coefficient in upper parts of the wall is underestimated by manuals.
Zadehmohamad, M., & Bolouri Bazaz, J. (2020). Evaluation of cyclic displacement amplitude of integral bridge abutment on backfill soil pressure and settlements. Road, (), -.
MLA
Mehdi Zadehmohamad; Jafar Bolouri Bazaz. "Evaluation of cyclic displacement amplitude of integral bridge abutment on backfill soil pressure and settlements". Road, , , 2020, -.
HARVARD
Zadehmohamad, M., Bolouri Bazaz, J. (2020). 'Evaluation of cyclic displacement amplitude of integral bridge abutment on backfill soil pressure and settlements', Road, (), pp. -.
VANCOUVER
Zadehmohamad, M., Bolouri Bazaz, J. Evaluation of cyclic displacement amplitude of integral bridge abutment on backfill soil pressure and settlements. Road, 2020; (): -.