توضیحات
ABSTRACT
A recent and promising method for shear strengthening of reinforced concrete (RC) members is the use of near-surface mounted (NSM) fiber- reinforced polymer (FRP) reinforcement. So far, numerical studies concerning the NSM FRP strengthening method have been rather limited. Moreover, virtually no comprehensive analytical research is available on the behavior of shear-strengthened beams considering NSM FRP. This paper illustrates a numerical research program on shear strengthening of RC beams with NSM reinforcement, aimed to investigate individual parameters effecting numerical analysis and capture the effect of important issues. The proposed numerical analysis is validated against published experimental results. Maximum load bearing capacity of proposed numerical models was shown very good conformity to experimental results. As a result, the behavior of the FRP systems predicted by the analytical modeling was slightly stiffer than the values recorded experimentally; probable differences in stiffness are discussed in this study. In general, comparison between the numerical predictions and test results shows desirable agreement.
INTRODUCTION
Fiber reinforced polymer (FRP) based techniques for shear strengthening of reinforced concrete (RC) structures have been rapidly gaining popularity worldwide. Beside the most widespread use of externally bonded FRP laminates, near-surface mounted (NSM) FRP has been found to perform efficiently as shear strengthening technology for RC beams . The NSM technique is based on fixing, by epoxy adhesive, FRP
laminates into pre-cut slits opened in the concrete cover of lateral surfaces of the beams. Finite-element analysis is clearly the most powerful ool for simulating complex structural behavior. This method is useful to model FRP shear-strengthened beams, which is a more economical approach than conducting elaborate laboratory tests. Recently finite-element studies on shear-strengthened beams have been conducted by Santhakumar and chandrasekara, Elyasian et al , and Godat and Neal . These analytical studies were focused on externally bonded (EB) shear trengthening. The available finite element investigations in the literature, on the scope of shear strengthening by FRP materials, do not onsidered NSM method. In this investigation, an analytical approach is developed, using ANSYS program, to predict the response of reinforced concrete beams strengthened in shear with NSM FRP composites, with a particular emphasis on the numerical modeling aspects.
Year: 2011
Publisher : Sixth National Congress on Civil Engineering
By : M. Jalali . J. Alaee, M. K. Sharbatdar
File Information: English Language/ 7 Page / size: 486 KB
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سال : 1390
ناشر :ششمین کنـگره ملی مهنـدسی عمـران
کاری از : محمدجلالی ,جلال آلعی, شربتدار
اطلاعات فایل : زبان انگلیسی / 7 صفحه / حجم : KB 486
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