The dead load of the bridge is the bridge itself and all the parts and materials that are used in the construction of bridge. Elastic material properties of these materials are taken as per Indian Standard IS code.įigure 1: (a) & (b): Cable Stayed Bridge in Y-Z plane (c): Cable Stayed Bridge in 3-D view Fe-345 grade of steel for pylon is used and tendons are used as cables. Grade of concrete and Fe-415 grade of reinforcing steel are used for members of bridge. The total length of bridge model is 200 m with two lanes of width 5.3 m each and total width of deck is 13 m, also have 75 mm thickness of wearing coat and kerb of size 600 mm x 300 mm. Concrete deck consist of box shape having two exterior longitudinal girder of thickness 300 mm with top and bottom slab of 300 mm thickness. Total 36 cables of diameter 60 mm are connected to the pylon with maximum height of 42 m and minimum height of 18 m spaced at 3 m intervals on the pylon and 10 m intervals on deck. The steel pylon is 50 mm thick with varying diameter of 1.2 m at bottom and 0.6 m at top, overall height of pylon is 55 m in which 45 m is above deck. In this study, the cables are arranged in a mixed or fan configuration which are supported by single pylon and that is built into the deck structure. Geometric Description of Cable Stayed Bridge Model Bridge is used for the analysis of cable stayed bridge These two different modellings provide differ results. Spine model uses frame object whereas Area object model uses area object with preferred maximum submesh size of 1 m for modelling. Bridge and their results are compared to infer which model is more acceptable.Ĭable stayed bridge is modelled for two different types of structural model i.e. The finite element analysis is performed in CSi. Spine model and Area object model are used to model for dead load and moving vehicle load.
In this study, cable stayed box girder bridge with two different structural models i.e. Cable stayed bridges are highly statically indeterminate structure in which stiffening girder behaves as a continuous beams supported elastically at the points of cable attachments.
The towers are the principle compression members transmitting the load to the foundations. The tower is responsible for absorbing and dealing with compression forces. The cables are anchored in the tower rather than at the end. Cables are stretched diagonally between these pillars or towers and the beam. It is one of the most modern bridges, consists of a continuous strong beam (girder) with one or more pillars or towers in the middle. For span of 200 m to 400 m, concrete girder is considered more economical and preferable. KeywordsCable Stayed Bridge, Structural Model, Spine Model, Area Object Model, IRC Class A, Finite Element Analysis, CSi BridgeĬable Stayed Bridges have been most recognized and preferred for the span ranging from 200 m to 1000 m. The analysis is conducted in CSi Bridge and analysis results are compared with tables and graphs to find out the best structure model for analysis. Static analysis and moving vehicle analysis have been done in which IRC Class A vehicle load is applied and their load combination is considered for evaluating the results. Spine Model and Area Object Model are used for analysis of cable stayed bridge. There are different methods that can be used for structural model but in the present study two different types of structural model viz. Therefore, it becomes essential that the modelling of cable stayed bridge is more realistic and the analysis results are more satisfactory. Professor, Civil Engineering Department, Institute of Engineering and Science,Ībstract For longer span, cable stayed bridges are the first choice and to study its behavior under static and vehicle loading is important.
PG Scholar, Civil Engineering Department Institute of Engineering and Science, Analysis of Cable Stayed Bridge for Different Structural Model
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