International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 05 | May 2024
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p-ISSN: 2395-0072
Study of FRP Jacketing and Advanced Seismic Retrofitting Divyani Ganphade1, Prof. Ganesh Mahalle2 1M. Tech Student, Structural and construction Engineering Department, Ballarpur Institute of Technology,
Maharashtra, India
2Assistant Professor, Structural and construction Engineering Department, Ballarpur Institute of Technology,
Maharashtra, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract -This paper presents a dual-focused review
be attributed to their remarkable mechanical characteristics that surpass those of conventional construction materials [11-15]. FRP materials possess corrosion-resistant properties and demonstrate adaptability, making them highly suitable for reinforcing pre-existing concrete elements or constructing new composite sections. These materials offer several advantages, such as decreased construction time and lower maintenance costs [16,17]. In recent years, there has been a notable increase in the utilisation of FRP columns. This trend can be attributed to their remarkable mechanical properties and the decreasing costs associated with fibrous materials [18,19]. The utilisation of fiber-reinforced plastic (FRP) profiles in beam and column applications is widespread. These profiles can be categorised into three main types: FRP tubes, FRP profiles, and hybrid columns that combine steel, concrete, and fiberreinforced plastic tubes [20–22]. The main objective of Fibre Reinforced Polymer (FRP) columns is to utilise the inherent strength of FRP materials in order to induce transverse confining pressure within concrete columns. Simultaneously, there exists another classification of FRP profiles that seeks to provide structural column components that are lightweight [23,24]. The cost-effective production procedures of pultruded FRP profiles, which are now similar to those of steel profiles, have attracted significant interest in recent times [25]. Fiber-reinforced polymer (FRP) materials have demonstrated considerable promise in enhancing the strength, stiffness, and ductility of structural elements. Notably, there has been a notable increase in research attention dedicated to the investigation of "FRP columns," as seen by the publication of more than 1013 publications in this field in the year 2021 alone. The increasing interest and importance of FRP in civil engineering applications is highlighted by the growing trend shown in Figure 1. Simultaneously, the issue of seismic susceptibility continues to be a constant problem for structures, namely reinforced concrete (RC) bridges and buildings, located in regions that are susceptible to seismic events. The design of RC bridges in India has been historically characterised by several deficiencies, primarily attributed to the utilisation of old building codes. Consequently, these structures have been inadequately equipped to endure lateral seismic loads. The importance of mitigating seismic vulnerability has increased due to the introduction of seismic analysis methodologies that utilise non-linear static methods, which have received global attention.
encompassing two crucial aspects of structural engineering. The first segment explores the utilization of fiber-reinforced polymer (FRP) for confining concrete columns, aiming to enhance their strength and ductility by mitigating passive lateral confinement pressure. Existing numerical and analytical formulations describing the compressive behaviour of FRP-confined concrete under monotonic and cyclic loads are critically examined. The paper highlights the lack of welldefined strategies for modelling and the oversimplification of existing models, shedding light on the need for a comprehensive understanding of stress/strain levels in columns. Efforts are made to assess the effectiveness of various FRP combinations and explore potential future scopes to optimize the use of FRP-confined concrete in civil applications. The second segment provides a comprehensive overview of seismic analysis methodologies and retrofitting technologies, focusing on enhancing the resilience of structures. The discourse critically evaluates the typical approach of nonlinear static pushover analysis in assessing bridges and proposes the extension of the modal pushover method for more intricate structural configurations. The review delves into the advantages of retrofitting external sub-structures over conventional component-level methods and analyzes various methodologies, addressing key concerns and offering valuable perspectives for seismic engineering professionals. Key Words: Fiber Reinforced Polymer (FRP), Concrete Column Confinement, Seismic Analysis Methodologies, Retrofitting Technologies, FRP Jacketing, Seismic analysis.
1.INTRODUCTION The imperative shift of the construction sector towards sustainable development underscores the crucial significance of environmentally conscious building materials [1–5]. Several comprehensive literature reviews have extensively examined different materials and processes with the objective of enhancing the strength of concrete, taking into account both economic feasibility and environmental consequences [6–10]. It is worth mentioning that FiberReinforced Polymer (FRP) composite materials, which have historically been employed in the aerospace and military industries, have experienced significant adoption in the field of civil engineering during the past three decades. This can
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