Influence of Construction Joint and Bridge Geometry on Integral Abutment Bridges

Although integral abutment bridges (IABs) have become a preferred construction choice for short- to medium-length bridges, they still unclear bridge design guidelines. As IABs are supported by nonlinear boundaries, geometric parameters strongly affect IAB behavior and complicate predicting the response assessment purposes. This study demonstrates effect of four dominant parameters: (1) girder material, (2) length, (3) backfill height, (4) joint below seats on rise fall AASHTO extreme temperature with time-dependent effects in concrete materials. The factors influencing response, such as timeline, thermal expansion coefficient, stiffness, pile-soil assumed be constant. To compare material geometry influence, evaluates critical superstructure substructure axial force, bending moment, pile head displacement. All values were related considered parameters, while not always linearly proportional. Prestressed (PSC) did differ significantly from steel response. Forces moments induced movements loads negligible should process.