International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 07 | July 2022
e-ISSN: 2395-0056
www.irjet.net
p-ISSN: 2395-0072
ANALYSIS, MODELLING AND ESTIMATION OF SUSPENSION BRIDGE Sachin Paul2, Abhijith P S1, Anjana Thambi1, Anju Thomas1, Merin Mathew1 Student, Dept. of Civil Engineering, Mar Athanasius College of Engineering Kerala, India Professor, Dept. of Civil Engineering, Mar Athanasius College of Engineering Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – A bridge is a structure built to span a body of complete the project and multiplied by unit cost of items 1
2
water, valley, road or any other physical obstacles, for the purpose of providing passage over the obstacles. Among them suspension bridge is one of a type of bridge which has span larger than any other types of bridges. This project has carried out the modelling and analysis of suspension bridge using MIDAS Civil Software. We have modelled a 650m spanning suspension bridge with 2 lane road. The 3 D model of the designed bridge has done in Revit Architecture Software. A preliminary estimation of the same bridge has done manually. All loading cases in the analysis and design are as per IRC 6-2017 code specifications. In MIDAS Software, the total modelling of the suspension bridge was done as per IRC 112-2020. The intensity of vehicle moving load as per IRC 6 -20 17 (heavy loading class 70 R and class A wheel load) is analyzed by MIDAS Civil. Moments and load at each point within the element can be easily observed from the software output results. After manual estimation we have came to known that our designed suspension bridge costs a sum of Rs.365Cr.
concerned. The unit rates of each items used in the construction can be taken from Delhi Schedule of Rates which is a comprehensive and useful technical document for execution of civil works.
Key Words:
2. STUDY ON SUSPENSION BRIDGE
Analysis, Force, Midas Civil, Moment, IRC 6 - 2017, IRC1112-2020, estimation, Revit Architecture.
1.INTRODUCTION Suspension bridges are a type of structure where the deck is hung below a series of suspension cables that are on vertical suspender. Suspension bridges have cables that hangs between its pylons to help carry the weight of the deck with its vertical suspenders. This design allows for the deck system to arc upwards for additional clearance. Many of them built without falsework. With this project we aim to design a suspension bridge of 650m span and 11m width connected to two pylons using suspension cables. The analysis can be carried out using MIDAS Civil Software. For modelling and analyzing structural systems, the analysis program in MIDAS Civil has proved itself to be a powerful tool because the provision of the Construction Stage Analysis feature allows the generation of construction stages by the choice to vary the structural system and therefore the loading condition. The approximate cost of any engineering project can be calculated by Estimation, which is a scientific way of working out of the cost before the execution of work. Estimate is prepared by calculating the quantities from the dimension on the drawings for various items required to
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1.1 OBJECTIVES I.
To study about suspension bridges.
II.
To understand the design procedure of suspension bridge in MIDAS Civil.
III.
To perform completed state and construction stage analysis.
IV.
To study the preliminary estimation of suspension bridge.
V.
To study the 3D modelling of suspension in REVIT ARCHITECHTURE Software.
Suspension bridge is one of a type of bridge that has a larger span than any other form of bridges. As it gets larger span it will get more flexible structure. A suspension bridge is a type of bridge which is build by hanging the deck system from cables attached to a master cable which runs above the length of the bridge. The design of a suspension bridge is simple and straightforward and takes advantage of several techniques to distribute the weight of the bridge safely and uniformly. The different components and forces acting on a typical suspension bridge is shown below.
3. CASE BRIDGE
STUDY:
INCHATHOTTY
SUSPENSION
Inchathotty is a village located near Neriamangalam, Thattekkad and Kothamangalanm in Eranakulam dist. In kerala , India. It is famous for its hanging bridge , which is considered as the longest suspension bridge in kerala with a length of about 183m and a width of about 1.2m. Further details of the bridge is shown in the table below.
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