YALIN VE L?FL? POL?MER SARGILI BETONARME K?R??LERDE E??LME DAVRANI?ININ SONLU ELEMAN MODELLEMES?

摘要

Reinforced concrete structures and structural elements are subjected to various load effectsduring their lifetime, such as environmental factors, improper handling, earthquake effects. Low materialstrength and low quality are the most important factors that reduce the load carrying capacity and whenevaluated together with other factors, it is the most important cause of damage to the structures andstructural elements. Therefore, in order to determine the performance of the structures according to thedamage levels and decide on the repair / strengthening method to be applied, a preliminary design studyhas to be done with determining the quality of the existing materials. One of the most important steps ofthis work is to prepare the numerical model of a complete structure or a specific part of the structure. Inorder to develop a precise numerical model, it is necessary to define the behavior of the elements with theconstitutive relations of the materials realistically. In this study, the numerical models of the reinforcedconcrete beams which authors had already performed the experiments and reinforced concrete beamssubjected to experimental loads in the literature are modelled and the results are presented. Researchersadopted the approach of elasto-plastic damage theory for reinforced concrete beams previously used inthe numerical modeling of masonry walls. In this study, the flexural behavior of two unreinforced andthree Fiber-reinforced polymer (FRP) strengthened beams with using LUSAS finite element softwaresuccessfully modeled.