The Influence of Multiple Support Excitation on the Behavior of Large-span Frame Structures

U područjima gdje su potresi česta pojava, vrlo je bitno razumijeti kako se konstrukcije ponašaju prilikom njihovog djelovanja kako bismo na adekvatan način projektirali i izveli konstrukcije otporne na potresno djelovanje. Naglasak na tome je još veći kada se radi o infrastrukturnim objektima, poput mostova koji povezuju mjesta ili regije velikih važnosti te na kojima se odvija velika količina prometa. Kod takvih konstrukcija je poznavanje dinamičkog odgovora prilikom djelovanja višestruke pobude oslonaca od velike važnosti. Iz tog su razloga u ovome radu provedena eksperimentalna ispitivanja na dva različita okvirna modela te je paralelno s njima razvijan numerički model, temeljen na metodi konačnih elemenata. Cilj je na temelju postojećih eksperimentalnih ispitivanja izraditi i validirati numerički model, te koristeći se eksperimentalno i numerički dobivenim rezultatima doći do novih saznanja o dinamičkom odgovoru konstrukcija izloženih višestrukoj pobudi oslonaca.In regions where earthquakes are a common occurence, it is very important to have a good understanding of the behaviour of structures during an earthquake so that we could design and build new structures in such a way that they are more resilient to earthquake excitation. The emphasis is even greater when it comes to infrastructural objects, such as bridges that connect places or regions of great importance and on which large amounts of traffic takes place every day. Therefore, understanding the dynamic response of structures subjected to multiple support excitation, is of great importance. For this reason in this work, experimental tests were carried out on two different frame models and in parallel with that a numerical model, based on finite element method, was developed. The goal is to develop and validate the numerical model against the experimental tests, that were carried out beforehand, and to use the numerically and experimentally obtained results to gain new knowledge about the dynamic response of structures subjected to multiple support excitation