International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 10 Issue: 07 | Jul 2023
p-ISSN: 2395-0072
www.irjet.net
ANALYSIS OF SKEWED COMPOSITE BRIDGES Govind Kasat 1, Dr. Chandrakant Pol2 1P.G.student, Department of Civil Engineering, Walchand College of Engineering, Sangli, Maharashtra (India). 2Professor, Department of Civil Engineering, Walchand College of Engineering Sangli, , India.
---------------------------------------------------------------------***--------------------------------------------------------------------degrees are considered Straight Bridges as variation in Abstract - Bridges are the important components of the
parameter like Shear Force, Bending Moment and Torsional Moment is very small beyond 30 degrees there is a huge variation in parameters. The main Motive of our research is to determine the most Critical angle i.e. The angles at which there is a sharp increment or decrement in Shear Force, Bending Moment, and Torsional Moment. Generally, these are the points or skew angles at which Design must be carried out more precisely and rigorously to avoid any type of failure. For our analysis, we have made use of MIDAS CIVIL Software.
Highway and Railway Transportation System. Failure of Bridges due to natural and manmade hazards may cause significant disruption to the transportation system and may affect its performance. Thus it results in major economic losses. Thus Safety and Serviceability of bridges have always been a great concern to Civil Engineering Profession. Bridges are a very special type of Structure. They are characterized by Simplicity in Geometry and Loading Condition. The Reinforced Concrete Bridges are usually subjected to Uniformly Distributed Dead Load, Vehicular Live Loads, and transfers same to the support through flexure, Shear, and Torsion. Newly Designed Bridge Structures are often Skewed Structures and they are often used in highly congested Urban Areas where there is Space Constraint or in mountainous terrain areas. If a Road alignment crosses the river or any other obstructions at an angle other than 90 degrees then Skewed Bridge Structure is necessary as they are Economical and most prominent Structures in such conditions. However, force flow in Skewed Structure is much more complicated than Conventional Bridge Structure. Various Promising methodologies like Grillage analysis, Finite Element Method, or Load Distribution Method are available. But Finite Element Method is considered the most suitable and precise methodology of analysis. This technique requires high precision in Data Collection, Modelling, and analysis of Skewed Structure and interpretation of results. In this research, an attempt has been made to study variations of various parameters like Bending Moment, Shear Force, and Torsional Moment with different skew angles ranging between 0 Degrees to 70 Degrees at an increment of 10 Degrees each. For our study, we have taken into consideration four major Loading Conditions i.e. 3Class A Loading Condition, Class A+70R Far, Class A + Class 70 R Near, and Fatigue Loading Condition as per IRC Guidelines. For in-depth analysis of the Skewed Bridge structure, 7 models for each loading condition i.e. overall 28 models were developed in MIDAS CIVIL for our analysis purpose.
1.1 Software and its features MIDAS Civil is a Finite Element Analysis Software developed by MIDASoft used for bridge analysis and design. MIDAS Civil Combines powerful pre and post-processing features with an extremely fast solver, which makes bridge modeling and analysis simples,quick and effective. Also, there are several easy parameter modification tools available that can be used for parametric analysis leading to optimized and economical design. 1.2 Features MIDAS Civil provides the user with unlimited and efficient modeling methods for any type of project.
MIDAS Civil provides the user with various analysis functions for any type of analysis. It is used for linear analysis but is also capable of carrying out geometric nonlinear analysis.
Gets detailed design reports. Design features provide detailed and clear calculation histories, enabling checking the capacity of selected sections for moment shear and torsion.
2. Identify, Research and Collect Ideas
1. INTRODUCTION
This article gives us a brief idea about Skewed Bridges. Generally, due to complex intersections at various places such as Highways, Railway Crossings, and River Crossing, there is a continuously growing demand for such Skewed Bridges to distribute entire traffic without Congestion. Skewed Bridges for the angle between 0 degrees and 30
© 2023, IRJET
|
Impact Factor value: 8.226
|
From the study of various literature papers, it was found that very limited study has been carried over skewed bridges and even it doesn't hold much relevance in Indian Perspective due to differences in design Live Load Standards, and type of bridges built here.
ISO 9001:2008 Certified Journal
|
Page 361