Comparación del comportamiento sismo-resistente en puentes viga simple de acero con uso de aisladores de base con y sin núcleo de plomo

Abstract

In the following document, a series of stages and procedures are going to be developed to analyze and compare the current and possible behavior of bridges to the effect of seismic excitations, through possible modifications in the current types of supports. These analysis and comparisons are made by comparing the current high rigidities of the structures under study with respect to supports that through their hysteretic behavior allow changing those initial rigidities by large displacements that in the end are translated into structures very apt to diminish the possible effects of seismic accelerations. The structures studied are the Sarapiqui bridge, located in Heredia and the Tres Amigos bridge located in Alajuela, both have different characteristics to seismic behavior due to their location. The first of the bridges due to its location close to a tectonic fault must make corrections for the construction of its design spectrum. From this project, we obtain results of much consideration for behavior evaluation such as: accelerations, periods and displacements, as well as informational support for when a new structure of alternative types of more effective supports will be built. As well as a verification of the current behavior of the structures, as this is not a very common custom so the behavior of works is unknown.