International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 07 | July 2023
p-ISSN: 2395-0072
www.irjet.net
ANALYTICAL STUDY OF STEEL ARCH BRIDGE Mr. Apurv Patil 1, Dr. M.R. Shiyekar 2 1PG Student, Structural Engineering Department, Government College of Engineering, Karad,
Maharashtra, India Professor, Structural Engineering Department, Government College of Engineering, Karad, Maharashtra, India ---------------------------------------------------------------------***--------------------------------------------------------------------Apply the pedestrian load of 3.6kN/m^2, live loading in Abstract - It has been a year since bridge engineers and designers not only considered the stability of bridges but also aesthetics as well as efficiency. So in this paper, an arch bridge is considered for study, which satisfy both conditions. In this study, we changed the rise of an arch of the bridge and deck positions, analyzed the behaviour of the bridge by deflection, bending moment, and self-weight. By comparing all these parameters, we propose an alternative lightweight and more stable bridge structure.
this study is HS20-44 truck loading.
Key Words: Steel Arch bridge, arch rise change, deck positions, deflection in bridges, lightweight bridge.
Results of the comparative study & Conclusion.
Analysis the all models , comparing all results optimize arch rise. After optimizing rise modelling of bridges for different deck position with optimized rise. Comparison of generated data for all models.
2.1 Geometry of bridge
1.INTRODUCTION
The Span of the Bridge is 225 m.
Over the years, people have constantly looked for ways to move their goods from one location to another. It was difficult and time-consuming to cross across valleys, rivers, or other impediments with horses and camels in the past. This was done by going along the rivers and valleys in search of ideal crossing locations, which took a lot of effort. After a number of years, increased population led to increased demand for goods like agricultural products as well as the use of increasingly sophisticated and substantial vehicles like carts. This complicated the transport process even more. This gave rise to the concept of building a bridge over rivers and valleys to provide much quicker access in order to meet the demands of the expanding population. Now these structures are known as bridges.
Span of Arch Bridge: A long-span bridge is decided to use, so a 225-metre span is considered for analysis. It meets the long-span requirement and provides a clear length and number of panels. Panel Arrangement: Panels should not exceed 1/15 of the bridge span. Therefore, 15 panels were provided. Arrangement of Hangers: Hangers are provided every 15 metres; their height can be obtained from the arc equation in the x-z pane. Where f is the crown of the arc and L is the span length. a.
A bridge is a structure that spans natural or artificial materials to give access over barriers like valleys, rugged terrain, or water bodies. When the earliest modern civilizations emerged in Mesopotamia in antiquity, they were initially employed. After that, engineering, manufacturing, and understanding of new materials for building bridges moved beyond national borders, allowing for the gradual but steady development of bridges throughout the world.
Allowable Deflection- Highway bridges consisting of simple or continuous span should be designed so that deflection due to live plus impact load does not exceed 1/800th of the span. For a bridge span of 225 m, only 28.12 cm of deflection is allowable as per AASHTO code..
2.2 Vehicle Load Considered for Bridge-AASHTO Load
2. METHODOLOGY
The live load for a bridge consists of the weight of the applied moving load of vehicles and pedestrians.
First modelling of arch bridge structures in sap 2000 with different rise ratio (L/3, L/4, L/5, L/6).
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Impact Factor value: 8.226
Y=f*[1-(2x/L-1)^2]
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