Nonlinear finite element analysis of Integral bridge including foundation soil Interaction (winkler analogy)
Bridges without expansion joints are called "integral bridges." Eliminating joints from bridges crates concerns for the piles and the abutments of integral bridges because the abutments and the piles are subjected to temperature-induced lateral loads. This kind of bridges are becoming v...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2006
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| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7112/1/24p%20MOHAMMAD%20SOFFI%20MD.%20NOH.pdf |
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| Summary: | Bridges without expansion joints are called "integral bridges." Eliminating joints
from bridges crates concerns for the piles and the abutments of integral bridges
because the abutments and the piles are subjected to temperature-induced lateral
loads. This kind of bridges are becoming very popular due to different aspects such
as good response under seismic loading, low initial costs, elimination of bearings,
and less maintenance. However, the main issue related to the analysis of this type of
structures is dealing with the soil-structure interaction of the abutment walls and the
supporting piles.
This study describes the implementation of a two dimensional finite element model
of integral bridge system which explicitly incorporates the nonlinear soil response.
The superstructure members have been represented by means of three-noded
isoperimetric beam elements with three degree of freedom per node which take into
account the effect of transverse shear deformation.
The soil mass is idealized by eight noded isoperimetric quadrilateral element at near
field and five noded isoperimetric infinite element to simulate the far field behavior
of the soil media. The nonlinearity of the soil mass has been represented by using the
Duncan and Chang approach. In order to study the behavior of integral bridge under
varies loading condition including the effect of temperature load, three type of analysis was carried out, which are Winkler's spring analysis, linear analysis and
nonlinear analysis. The results show that, the soil nonlinearity has significant effect
on the results, where the displacement which obtained form nonlinear analysis is
much higher than that obtained from linear analysis and spring analysis. |
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