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Calibration and parametric investigation of integral abutment bridges
Highlights A 3D finite element model is calibrated with a field instrumented IAB data. Nonlinear p-y method was used to model soil-pile and soil-abutment interactions. Shrinkage models, earth pressure theories and temperature distribution across the bridge superstructure were considered in simulation. Soil stiffness around the pile has more impact than the pile orientation on the pile displacement. Pile stresses were proportional to the soil stiffness and inversely proportional to the pile stiffness.
Abstract Integral abutment bridges (IABs) are a special type of bridges that are built free of joints on the superstructure to overcome the undesirable consequences associated with conventional jointed bridges. Despite of the proven advantages of IABs, no consensus exists among bridge engineers about design guidelines. This paper presents a parametric study validated to a field monitored concrete IAB using a three-dimensional finite-element model to study the parameters that affects the bridge response. Bridge length, pile size and orientation, and soil type were included in the study. Bridge components were simulated using 3D solid elements for best reflection of the real behavior of the IAB. Nonlinear p-y method was employed to model soil-pile and soil-abutment interactions. Several shrinkage models, earth pressure theories and temperature distribution across the bridge superstructure were considered in simulating the field response of the IAB. The outcomes of the calibration process were utilized in building sound models for the parametric study. The soil stiffness around the pile was found to has more impact than the pile orientation on the pile displacement. Pile stresses were found to be proportional to the soil stiffness and inversely proportional to the pile stiffness. Moreover, the maximum stresses occurred within the middle segment of the pile rather than the pile-abutment interface due to apparent abutment rotation. The study promotes understanding of important facts which could assist in a better IAB design.
Calibration and parametric investigation of integral abutment bridges
Highlights A 3D finite element model is calibrated with a field instrumented IAB data. Nonlinear p-y method was used to model soil-pile and soil-abutment interactions. Shrinkage models, earth pressure theories and temperature distribution across the bridge superstructure were considered in simulation. Soil stiffness around the pile has more impact than the pile orientation on the pile displacement. Pile stresses were proportional to the soil stiffness and inversely proportional to the pile stiffness.
Abstract Integral abutment bridges (IABs) are a special type of bridges that are built free of joints on the superstructure to overcome the undesirable consequences associated with conventional jointed bridges. Despite of the proven advantages of IABs, no consensus exists among bridge engineers about design guidelines. This paper presents a parametric study validated to a field monitored concrete IAB using a three-dimensional finite-element model to study the parameters that affects the bridge response. Bridge length, pile size and orientation, and soil type were included in the study. Bridge components were simulated using 3D solid elements for best reflection of the real behavior of the IAB. Nonlinear p-y method was employed to model soil-pile and soil-abutment interactions. Several shrinkage models, earth pressure theories and temperature distribution across the bridge superstructure were considered in simulating the field response of the IAB. The outcomes of the calibration process were utilized in building sound models for the parametric study. The soil stiffness around the pile was found to has more impact than the pile orientation on the pile displacement. Pile stresses were found to be proportional to the soil stiffness and inversely proportional to the pile stiffness. Moreover, the maximum stresses occurred within the middle segment of the pile rather than the pile-abutment interface due to apparent abutment rotation. The study promotes understanding of important facts which could assist in a better IAB design.
Calibration and parametric investigation of integral abutment bridges
Salman, Nassr N. (author) / Issa, Mohsen A. (author)
Engineering Structures ; 227
2020-09-27
Article (Journal)
Electronic Resource
English
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