Flexural capacity of negative moment region NSM-CFRP strengthened RC T-beam under high loading rate: an analytical prediction

Abstract

In the design phase of strengthening a reinforced concrete (RC) beam, it is necessary to determine its capacity. Response-2000 software offers efficient analysis for determining the capacity of a beam, including its flexural capacity. The aim of this study is to assess the predictive accuracy of Response-2000 software in determining the flexural capacity of the negative moment region of NSM-FRP strengthened RC T-beams under high loading rates. The validation of the static material model was initially conducted and then several combinations of established empirical formulations were utilized to express the corresponding dynamic properties of relevant materials. The findings of the study suggest that the compressive and tensile strength of concrete have a significant impact on the flexural capacity of the strengthened beams. Furthermore, empirical evidence supports the idea that Response-2000 possesses the capability to effectively predict the flexural capacity, utilizing a rate-dependent material approach.