This paper deals with an experimental study on the tensile performance of recently developed “FRP Hybrid Bars” by authors. The objective of this study is to investigate tensile strength of FRP Hybrid Bars. FRP Hybrid Bar uses the concept of material hybridization to increase elastic modulus to be used in concrete structures, especially for marine and port concrete structures. The effect of hybridization on tensile properties of FRP Hybrid Bars was evaluated by comparing the results of tensile test with those of non-hybrid FRP bars. The results of this study indicated that the elastic modulus of the hybrid GFRP bar was increased by up to approximately 5 to 204 percent by the material hybridization.

Besides its exceptional resistance to corrosion, Fiber Reinforced Polymers (FRP) present the advantage to develop high strength compared to its self-weight which highlighted it recently as a material that can replace fairly classical construction materials like steel and concrete. The emergence of glass fiber and the development of resin fabrication technology made it possible to reduce significantly the costs of FRP material and the emphasis given on the importance of life cycle cost (LCC) for structures after the 1980s opened its exploitation in the construction domain. In this paper, research trends of structural member development which is related to FRP material are briefly suggested.

Fiber reinforced polymer (FRP) reinforcing bars for concrete structure, as a non-corrosive material, has been extensively investigated by many researchers. However, it has not been practically used as the reinforcement or structural material in civil engineering structures due to its low elastic modulus if glass fibers were used. This study was motivated to overcome this shortcoming of FRP bars to be used for concrete structures. Material hybridization was applied to enhance its elastic modulus. The effect of material hybridization was evaluated by comparing the results of tensile test with those of non-hybrid FRP bars.

In this study, several vibration characteristics of model bridge due to changes in cable tension are experimentally analyzed. In order to achieve the study, acceleration responses are measured from the model bridge for several cable tension case. The values of features extracted by frequency transform method are increased due to tension-loss.

Safety management means that protect the life and property from natural disaster such as earthquake and abnormal climate etc. And also it is very important as the building structures are higher and more large scale structures. In this paper, various kind of technologies including fiber optic sensor application, image processing for detect the crack width are simply proposed. And also, the schematic system which can be applicable to the safety management of building and large scale structure are suggested. Related research project have performed by KICT since 2011, and this year is 2nd project period. As time goes on, the developing state of the arts will be presented in the future.

Causing damage to the actual structure is not easy for new evaluation techniques to validate the damage. Creating a new structure for the validation that is expensive and requires a lot of time. So to verify the techniques using scale model is a common and effective way. For the validation of new techniques, it was to make a scale model of the cable-stayed bridge type and various damages were caused to the bridge model.

In this paper, a finite element analysis to design hybrid reinforcing polymer bars was presented. Two different types of hybrid FRP bar were considered in finite element modeling. To offer the necessity and validity of finite element modeling for the hybrid reinforcing polymer bars, shape and material properties were assumed. Input conditions for analyzing the hybrid reinforcing polymer bars using FEM were verified. Using the results of the finite element analysis, the hybrid reinforcing polymer bars were optimally designed and the results are presented in this paper..