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Seismic performance case study of bridge pile cap foundation
The purpose of this report is to build a model that represents, as best as possible,
the seismic behavior of a pile cap bridge foundation by a nonlinear static (analysis)
procedure. It will consist of a reproduction of a specimen already built in the
laboratory. This model will carry out a pseudo static lateral and horizontal pushover
test that will be applied onto the pile cap until the failure of the structure, the
formation of a plastic hinge in the piles due to the horizontal deformation, occurs.
The pushover test consists of increasing the horizontal load over the pile cap until
the horizontal displacement wanted at the height of the pile cap is reached. The
output of this model will be a Skeleton curve that will plot the lateral load (kN)
over the displacement (m), so that the maximum movement the pile cap foundation
can reach before its failure can be calculated. This failure will be achieved when the
load at that specific shift is equal to 85% of the maximum.
The pile cap foundation finite element model was based on pile cap built for a
laboratory experiment already carried out by the Master student Deming Zhang at
Tongji University. Two different pile caps were tested with a difference in height
above the ground level. While one has 0:3m, the other rises 0:8m above the ground
level. The computer model was calibrated using the experimental results.
The pile cap foundation will be programmed in a finite element environment
called OpenSees (Open System for Earthquake Engineering Simulation ). This
environment is a free software developed by Berkeley University specialized, as it
name says, in the study of earthquakes and its effects on structures. This specialization
is the main reason why it is being used for building this model as it makes
it possible to build any finite element model, and perform several analysis in order
to get the results wanted. The development of OpenSees is sponsored by the Pacific
Earthquake Engineering Research Center through the National Science Foundation
engineering and education centers program. OpenSees uses Tcl language to program
it, which is a language similar to C++.
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Check whether the spanish journal in which you have published an article allows you to also publish it under open access.