Paper Details

Today, there are a great number of various structures that have been retrofitted by using different FRPcomposites. For this reason, more research is needed to learn more about the properties of such structures, as well as acomparison before and after retrofitting. In this study, one story reinforced concrete (waffle slab) building is tested usingambient vibrations, in order to get the dynamic behaviors. Slabs of this building are then retrofitted by using CFRPcomposite, and then tested with ambient vibrations. At this stage it is necessary to evaluate the dynamic behavior of theexisting and retrofitted state of the building. Various types of methods of OMA, such as EFDD, SSI, etc. are used to takeaction in the ambient responses. Having a purpose to learn more about the effects of FRP composite, operational modalanalysis of both types (retrofitted and no-retrofitted buildings) is conducted to evaluate their dynamic behaviors.Furthermore, the Stochastic Subspace Identification is used through output-only modal identification. At the end of thisstudy, reasonable correlation is obtained between mode shapes, frequencies and damping ratios. The goal of thisresearch is to show and determine the effects of CFRP composite implementation on structural responses of thisbuilding, in terms of changing its dynamical behaviors. There is an average difference of 18.844% between thefrequencies of existing and retrofitted buildings. Finally, it is shown that, in order to evaluate the frequencies and rigidityof retrofitted structures, OMA might be used.

Furkan Günday, “OMA OF RC INDUSTRIAL BUILDING RETROFITTED WITH CFRP USING SSI”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 5, pp. 759-771, May 2018.