International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 09 Issue: 07 | July 2022 www.irjet.net p-ISSN: 2395-0072 © 2022, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 2611 DYNAMIC RESPONSE OF FIBRE REINFORCED POLYMER AND SRC COMPOSITE CABLE STAYED BRIDGES UNDER MOVING AND WIND LOADS K. E. Bhoir 1 , Dr. P. K. Deshpande 2 1 Student, M Tech, Civil- Structural Engineering, Government College of Engineering, Karad, India. 2 Assistant Professor, Applied Mechanics Department, Government College of Engineering, Karad, India. ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract - Cable Stayed Bridge are typical long span bridge which are classified on the basis of longitudinal and transverse cable profile arrangements and pylon shapes. For the cable- stayed bridge chosen for the current study, composite materials are intended to use such as Fibre Reinforced Polymer and Steel Reinforced Concrete which is then compared with conventional Precast Concrete deck and it's important to accurately evaluate the deck and pylon deflection and all the forces and stress characteristics of the structural elements of cable stayed bridge. Hence, dynamic evaluation of varied components of such bridges gains more importance due to their geometric complexity. So, the aim of the study is to develop most efficient type of composite Cable stayed bridge under the dynamic moving load and static wind load and their load combinations as per IRC and EN1991-1-4 respectively as these loads are dominating in a typical cable stayed bridge than seismic loads. A 3-span continuous cable stayed bridge with diamond shaped pylons is considered and modelled in FEM software Midas Civil 2019. The results are discussed in terms of pylon displacement, cable forces, bending moment, torsion of composite deck. The results concluded that Fiber Reinforced Polymer composites deck gives the less critical values and is most efficient as compared to the steel reinforced concrete and conventional precast concrete deck cable stayed bridge. Key Words: Cable Profile Arrangement, Fiber Reinforced Polymer, Steel Reinforced polymer, IRC Loadings and their Load Combinations, Type of Pylon. 1.INTRODUCTION Cable stayed bridges are aesthetically attractive and they are relatively lightweight, flexible and lightly damped structure and have larger span as compared to general bridges. Also, cable stayed bridges experience most flexibility than normal girder bridges. The structural efficiency and design of cable stayed is complex due to comprising of several structural components with individual stiffness and damping properties as both steel and concrete materials are in construction. Hence analysis of cable stayed bridges are done to estimate the dynamic response due to dynamic moving load and static wind load as the structure is light weight both the vehicular and the wind loads are predominating. There are two major structural advantages for achieving success in design of cable stayed bridges. Firstly, since variety of compact cables is self-anchored in an exceedingly cable stayed bridge, massive-scale anchorage isn't necessary as in an exceedingly conventional span. Secondly, the diagonally tensioned cables during a cable stayed bridge have greater rigidity and are less deflective than those of a suspension bridge, resulting in cost reductions. For the cable-stayed bridge designated for the current analysis, composites materials are used such as Fibre reinforced polymers and steel reinforced concrete. Nowadays, many more industries have brought light on all the probabilities that Fibre Reinforced Polymer composites must offer, aesthetically and structurally speaking. These composites prevail for an extended period long back but their specific use of material in industries is current. When it involves the sector of bridge construction, alternatives to conventional materials, like steel, which mainly look after corrosion, fatigue, and also high maintenance problems. Thus, Fibre Reinforced Polymer composites research can state that it is one of the better replacements compared to conventional. FRP provides certain betterment which are lesser self-weight of the fabric, the dynamic effect of this composite bridges can be crucial. comparison for the cable- stayed bridge design, it's desirable to also design a bridge with traditional materials, during this case a steel-concrete composite bridge. (Khalifa et al. 1996) described the assorted analysis and design aspects of a fiber reinforced plastic (FRP) bridge. The analysis is formed using three-dimensional (3-D) macro models of the bridge to explain its overall behavior under static and dynamic loads. (Adanur et al. 2011) studied the Fiber reinforced polymer (FRP) composites which provide many interesting features for existing and new bridges. Among these features are light weight, high stiffness-to- weight ratio and strength-to-weight ratios, damping abilities, and high resistance to environmental deterioration when properly designed and installed. (Xiong et al. 2011) introduced new forms of cable-stayed bridges with carbon fiber reinforced polymers (CFRP) stay cables and/or a CFRP deck. for every of the 2 CFRP components, namely, CFRP stay cables and CFRP deck, the key design parameters and style