FRP

The opportunities provided by the use of Carbon Fiber Reinforced Polymer (CFRP) composites for the seismic repair of reinforced concrete (RC) structures were assessed on a full-scale dual system subjected to pseudodynamic tests in the ELSA laboratory. The aim of the CFRP ...

Civil engineers have considered Fiber Reinforced Polymer (FRP) materials to enhance the performance of structural members subjected to static and dynamic loading conditions. However, there are some design limitations due to uncertainty in the behavior of such strengthened members. This fact is particularly important when considering the complex nature of the nonlinear behavior of materials, the impact loading conditions and geometry of the members having FRP systems. In this research, a new analytical model is developed to analyze structural members strengthened with FRP systems and subjected to impact loading conditions. ABAQUS based finite element code was used to develop the proposed model. The model was validated against nine beams built and tested with various configurations and loading conditions. Three sets of beams were prepared and tested under quasistatic and impact loadings by applying various impact height and Dynamic Explicit loading conditions. The first set consisted of two beams, where one of the beams was reinforced with steel bars and the other was externally reinforced with GFRP sheet. The second set consisted of six beams, with five of the beams were reinforced with steel bars and one of them wrapped by GFRP sheet. The last set was tested to validate the response of concrete beams reinforced by FRP bar. In addition, beams were reinforced with glass and carbon fiber composite bars tested under Quasi-Static and Impact loading conditions. The impact load was simulated by the concept of a drop of a solid hammer from various heights. The numerical results showed that the developed model can be an effective tool to predict the performance of retrofitted beams under dynamic loading condition. Furthermore, the model showed that FRP retrofitting of RC beams subjected to repetitive impact loads can effectively improve their dynamic performance and can slow the progress of damage.

Composites are made by combining of two or more different materials, which are having different characteristics. Composites materials are widely used today in various applications. Pultrusion process is used to manufacture composite material, in these process different types of roving of glass, carbon, aramid fibres are used to make different pultruded material as per their application. Pultruded product which are various types of shape like C-channel, I-beam, square pipe, circular pipe etc…, Today pultruded products are used in various applications like bridges, FRP ladders, communication tower, cooling tower, etc…There are several products of pultrusion products used in different application, but we have to analyze different products uses for a special application in terms of strength.

Many concrete structures are getting weakened or collapsed due to corrosion of steel reinforcement in structures and other factors. Rehabilitation and strengthening of concrete structures with FRP (Fibre Reinforced Polymers) has been a useful technique since last few years. FRP sheets or plates are very suitable for strengthening not only because of their strength, but also due to the simplicity in the application. In this review paper, different strengthening techniques using FRP and other materials are reviewed. It can be concluded from the literature review that FRP is one of the efficient option for strengthening in either of the case like increasing the load carrying capacity of structures or to restore the original capacity of the structure after distress due to any means.

Use of fiber reinforced plastic (FRP) composites for strengthening of beams and columns in RC structures has attracted great attention in recent decades. However, less attention has been paid to strengthening RC connections with FRP laminates. In the current study, a finite element (FE) modeling has been proposed for the non-linear analysis of RC joints covered with FRP overlays. The model consists of the effects of anchorage slip and anchorage extension of the steel reinforcement in the connection zone. As for the credibility of the method, some available experimental works were modeled and non-linearly analyzed using ANSYS. The results showed that the model can predict the experimental works with good accuracy. At the end and as a case study, a base joint specimen was strengthened with FRP laminates in 7 different cases and the specimens were analyzed using the aforementioned modeling. The results showed that good ductility and strength enhancement could be achieved by employing c...

Fibre reinforcement polymer (FRP) is a repair material of fibres of high strength, high stiffness
embedded in a polymer matrix with tensile strength of 1000-5000 MPa in different varieties. The FRP matrix
consists of a polymer or resin used as binder for the reinforcing fibres. The use of FRP has been increased
because of their high strength to weight ratio, low longitudinal and transverse coefficient of thermal expansion,
low sensitivity to fatigue loads and adequate resistant in aggressive environment. A lot of research reported
the different properties of FRP exposed to different cracks and environmental conditions. This paper presents
a review of different FRP types, their properties and their probable failures in various conditions by means of
experimental and numerical research results

F ire resistance of concrete members reinforced or strengthened with fiberreinforced polymer (FR P) materials is an extremely crucial area that needs to be investigated before implementing FRP composites in buildings and other structures vulnerable to fire. A review on the fire performance of FRP materials and FRP-strengthene d/reinforced concrete members is presented. The review includes the mechanical properties of various types of FRP materials at elevated temperatures (based on experimental results). The behavior of bond adhesive epoxies and the bond of FRP reinforcement are investigated under elevated temperature effects. Experimental (fire test) results and numerical studies for
unprotected concrete members strengthened or reinforced with FRPs (beams, columns and slabs), including failure patterns, as well as respective results for insulated concrete members, together with the type of insulation materials are also presented. The measured evolution of temperature at distinct locations within
the cross section of the tested element and the role of insulation are discussed. Factors that significantly influence the fire resistance of FRP-strengthened or FRP-reinforced systems are investigated and preliminary guidelines for the efficient
design of such systems in a fire environment are provided.

Measures to prevent progressive collapse of structures include protection of critical elements such as columns. In support of this goal, nine tests were conducted to assess the as-built performance of typical columns and the effectiveness of carbon fiber jackets in improving their performance. A quasi-static load protocol was developed to replicate in the laboratory the damage patterns observed in blast testing in the field. Load-deflection curves (resistance functions) and jacket strain were measured. Jackets were observed to change the failure mode from brittle shear to ductile flexure and to increase the load and displacement capacities of the column. Variations in jacket strain are discussed and experimental results are used to assess predictive models for shear capacity and resistance functions. The data support the use of these models for design but identify some limitations in the resistance functions.

This research presents the results of an experimental work to evaluate the shear capacity of simply supported concrete slabs reinforced with longitudinal fiber reinforced polymer rebars. The bars were in-house manufactured using locally available raw materials. Two types of FRP rebars were manufactured using glass roving to produce mono-fiber rebars and a mix of glass roving and nylon thread to produce hybrid rebars. The program included esting of eighteen one-way concrete slabs 100x450x60 mm and 100x450x70 mm reinforced with FRP rebars and steel bars. The specimens were tested under four point loading and loaded till failure. The FRP-reinforced concrete slabs were designed to fail in shear and the results were compared to those of the similar beams reinforced with conventional steel. The main parameters included the characteristic strength of concrete, reinforcement ratio and diameter of reinforcing bars. The test results are analyzed to evaluate, and compare the behavior of the tested slabs. The shear capacity was theoretically determined for the slabs according to the design formulas provided by different international codes. Useful design recommendations were reached based on the available results and the comparisons made.

Australian Journal of Basic and Applied Sciences, 4(5): 773-778, 2010 ISSN 1991-8178 © 2010, INSInet Publication ... Corresponding Author: Reza Mahjoub, MSC, Faculty of Engineering, Islamic Azad University, KhoramAbad Branch, Khoramabad, Iran, E-mail: ...

Rol yapma oyunları, bugün hem masaüstünde, hem de dijital ortamda fazlasıyla deneyim edilen oyunlar olduğu gibi, oyun piyasasına ziyadesiyle etki etmeyi başarmışlardır. Her ne kadar dijital dünyada rol yapma oyunu dediğimiz zaman birçok farklı isim akla gelse de tüm bu oyunların aslında analog olarak üretilip, akabinde dijital dünyaya aktarıldığını unutmamak gerekmektedir. Nitekim dijitalleşmenin etkilerine rağmen, masaüstü rol yapma oyunları hem dünyada, hem de ülkemizde ziyadesiyle deneyim edilmektedir. Bu oyunların ülkemizde de kendisine büyük bir yer bulması, şüphesiz fantastik ve bilim kurgu romanlar ile başlamıştır. Fakat onların bugünkü yerlerine gelmelerindeki en büyük pay, 90’lı yılların sonun ile 2000’li yılların ortasında kadar başta İstanbul ve Ankara’yı etkileyen, FRP Cafe’lerdir. FRP Cafe’ler ile birlikte daha önce görülmemiş bir alt kültür topluluğu ortaya çıkmış ve bir grup insanı etkisi altına almıştır. Her ne kadar bu bir oyun olsa da değişen konjonktürden etkilenmiş ve Satanizm olaylarının ortasında kalmıştır. Bu dönem esnasında FRP hakkında birçok olumsuz şey söylenmiş olsa da değişen zamana ayak uydurmuş ve yapılan convention etkinlikleri ile daha da görünür hale gelmiştir.

Adhesive bonding technology has played an essential role in the development and growth of the rehabilitation and repair of timber structures. The ability of a structural joint to maintain satisfactory long-term performance, often in severe environments, is an important requirement of a ...

Fibre reinforced polymer (FRP) composite system are used in many applications. This paper briefly reviews the history of FRP composite system and RCC beams and columns. The various applications of fibre reinforced polymer (FRP) are also reviewed. This review paper also deals with the various techniques of applying fibre reinforced polymer (FRP) composite system. Several recently published articles and technical papers dealing with fibre reinforced polymer (FRP) composites are critically reviewed. The purpose of this review paper is to study the retrofitting procedures technically and select the fibre reinforced polymer (FRP) composite material for experimental comparison of RCC beams and column with and without applying FRP composite system.