International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 03 | Mar 2024
p-ISSN: 2395-0072
www.irjet.net
IMPROVEMENT OF THE LONG SPAN BRIDGE AFTER FIBER REINFORCED POLYMER JACKETING WITH LATERAL LOAD: A REVIEW Laraib Ahmad1, Mr. Ushendra Kumar2 1Master of Technology, Civil Engineering, Lucknow Institute of Technology, Lucknow, India
2Head of Department, Department of Civil Engineering, Lucknow Institute of Technology, Lucknow, India
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Abstract - Long-span bridges represent vital components of
early 20th centuries witnessed the emergence of reinforced concrete bridges, with notable examples such as the Alvord Lake Bridge in San Francisco and the Thaddeus Kosciusko Bridge in Poland. Throughout the 20th century, reinforced concrete bridge design continued to evolve, driven by advancements in materials science and engineering principles. Innovations like pre-stressed concrete further enhanced the strength and durability of these structures. Today, reinforced concrete bridges are ubiquitous worldwide, symbolizing the triumph of human creativity and engineering over natural obstacles. As we look to the future, ongoing innovations in materials and construction techniques promise to further improve the sustainability, resilience, and efficiency of these essential components of transportation infrastructure.
infrastructure, encountering diverse environmental and operational exigencies over their operational lifespan. This scholarly review scrutinizes the efficacy of Fiber Reinforced Polymer (FRP) jacketing as a means to augment the performance of long-span bridges when subjected to lateral loads. Synthesizing extant literature, the review evaluates the structural behavior, performance enhancement, and longevity of long-span bridges retrofitted with FRP jackets. The examination delineates the fundamental mechanisms underlying FRP jacketing, elucidating its capacity to bolster the flexural strength, stiffness, and ductility of bridge elements. Moreover, the discussion encompasses the impact of lateral loads, such as wind, seismic events, and vibrations induced by traffic, on the behavior of long-span bridges reinforced with FRP jackets. Emphasis is placed on the importance of meticulous design, material selection, and construction methodologies to ensure the efficacy and enduring resilience of FRP retrofitting solutions. Case studies spanning diverse geographic regions and bridge typologies are analyzed to underscore the practical application and performance of FRP jacketing under lateral loading conditions. The review also confronts challenges and constraints associated with FRP retrofitting, including issues of adhesion, environmental degradation, and the imperative for sustained maintenance. Through its comprehensive examination, this review furnishes valuable insights into the optimization of long-span bridge performance via FRP jacketing under lateral loading circumstances, thereby providing guidance for researchers, engineers, and practitioners engaged in bridge retrofitting and maintenance endeavors.
2.INTRODUCTION Reinforced concrete bridges are vital components of transportation infrastructure, renowned for their durability, strength, and versatility. Combining the compressive strength of concrete with the tensile strength of steel reinforcement, these bridges offer remarkable structural integrity, making them suitable for spanning various distances and supporting heavy loads. The construction of a reinforced concrete bridge involves meticulous planning, engineering expertise, and adherence to stringent safety standards. Initially, engineers conduct thorough site surveys and analysis to determine the optimal design, considering factors such as traffic volume, environmental conditions, and geological features. Once the design phase is complete, construction begins with the creation of a sturdy foundation, typically using deep concrete footings or pilings to support the bridge's weight and withstand external forces like wind and water currents. Next, workers assemble formwork, which serves as a mold for pouring the concrete. Reinforcement bars, usually made of steel, are strategically placed within the formwork to provide tensile strength and prevent cracking under stress.
Key Words: Long span bridges, Fiber Reinforced Polymer (FRP) jacketing, Lateral loading, Structural retrofitting, Performance enhancement, Flexural capacity.
1.HISTORY The history of reinforced concrete bridges is a testament to human ingenuity and engineering prowess, spanning over two centuries of innovation and advancement. It all began in the late 18th century when the concept of reinforcing concrete with materials like iron was first proposed. However, it wasn't until the mid-19th century that significant progress was made, with pioneers like François Coignet and Joseph Monier laying the groundwork for modern reinforced concrete construction. The late 19th and
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The concrete mixture, composed of cement, aggregates, water, and sometimes additives for enhanced performance, is poured into the formwork and allowed to cure. During the curing process, the concrete gradually hardens and gains strength, ultimately forming a solid structure capable of withstanding significant loads. As the concrete cures, engineers closely monitor the construction progress,
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