Research on the study of polyurethane materials as a means of mitigating seismically induced damage in bridges
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/115007
Correu electrònic de l'autormiquelangelserra_26hotmail.com
Realitzat a/ambUniversity of Colorado Boulder
Tipus de documentTreball Final de Grau
Data2017-06-16
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
Abstract
This work consists in testing the Polyurethane Materials Elastocore and Elastocast in order to
obtain their mechanical properties. The main objective is to determine if they can be used as
flexible joints in bridge columns so as to reduce significantly damages produced by earthquakes.
However, in the present study, only the results of the Elastocore samples are presented.
Both types of polyurethanes are amorphous thermosetting polyether polyol-based polymers.
Elastocast samples are prepared manually mixing Elastocast Resin and Isocyanate. Elastocore
samples are prepared by the BASF company.
Different types of tests have been conducted: compression, relaxation and cyclic tests. The
mechanical properties of Elastocore are obtained from the results of the compression tests.
Compression tests have been performed at six different rates in order to observe the different
behavior of the material depending on the loading rate. The results showed that the Yield Strength
and Modulus of Elasticity are sensitive to the loading rate. Higher rates imply higher values of
both parameters.
Mattock's model has also been used to obtain the mechanical properties of Elastocore. The values
of the mechanical properties obtained with this method are similar to the ones obtained directly
from the test. Moreover, the results showed that the Yield Strength and Modulus are sensitive to
the loading rate as well.
Finally, the structural analysis conducted by professor Sideris and Mohammad T. Nikoukalam is
summarized. They performed structural tests of columns with a flexible joint at the base made of
Polyurethane Materials. They applied axial and lateral loads to the columns and studied the
different behaviors of the different Polyurethane Materials in order to determine the best option
for this application.
TitulacióGRAU EN ENGINYERIA GEOLÒGICA (Pla 2010)
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
TFG_MiquelAngelSerraMoll.pdf | 13,31Mb | Visualitza/Obre |