University of Twente Student Theses


Analysis of the effects of deterioration of a wooden pile foundation in masonry abutments

Knijff, J. (2019) Analysis of the effects of deterioration of a wooden pile foundation in masonry abutments.

[img] PDF
Abstract:The aim of this thesis is to find out how a masonry abutment behaves under the circumstances of a deteriorating wooden pile foundation. A case study was chosen, containing information about the current and possible deterioration of four piles under the abutment. These values were used as input for different scenarios within the analysis. The pile foundation was modelled using a soil structure interaction software, specifically made to convert piles and soil into spring stiffness values. The spring stiffness values were used together with the abutment in a finite element software, in which multiple deterioration scenarios were applied. Within the scenarios, either groups of piles were highly deteriorated or the whole foundation had a certain deterioration. Using these scenarios, a linear static analysis was executed to analyse the behaviour of the abutment. The results of the analysis showed that the movement of the abutment in line with the bridge was about 22 millimetres towards the water without deterioration. In a high deterioration scenario, the abutment moved 0.5% more. Considering vertical movement, the abutment movers up to 12 millimetres downwards without deterioration and 10 % more with the high deterioration case scenario. A stress analysis was also done, which showed that the tensile stress in the abutment exceeded the limit of the masonry, even without deterioration. To conclude, a difference between the scenarios could be found in the vertical displacement, but relatively little difference could be found in the movement in the direction of the bridge span. Moreover, the tensile stress in the masonry exceeded the maximum tensile stress of the material. Therefore, a non-linear analysis should be performed to give an insight into the abutment behaviour after crack forming.
Item Type:Essay (Bachelor)
Faculty:ET: Engineering Technology
Subject:56 civil engineering
Programme:Civil Engineering BSc (56952)
Link to this item:
Export this item as:BibTeX
HTML Citation
Reference Manager


Repository Staff Only: item control page