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Transfer Matrix Method For Construction Phase Analysis Of Incrementally Launched Prestressed Concrete Bridges

IR@SERC: CSIR-Structural Engineering Research Centre, Chennai

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Title Transfer Matrix Method For Construction Phase Analysis Of Incrementally Launched Prestressed Concrete Bridges
 
Creator Saptarshi Sasmal
Ramanjaneyulu, K.
 
Subject Bridge deck
Incremental launching
Transfer matrix
Stress state
Prestressing force
Equivalent load
Bearing flexibility
End of launch (E.O.L.)
 
Description The transfer-matrix method uses a mixed form of the element force–displacement relationship and transfers the structural behavior parameters (state array) from one section to the other. Hence, the transfer matrix method produces a system of equations that are simpler in comparison to those produced by the stiffness method. In this paper, a simplified transfer matrix technique is proposed to evaluate the state of stress at each cross section of prestressed concrete bridge decks during incremental launching. Prestressing force induces additional equivalent loads on the deck in upward as well as downward directions depending on the profile of the prestressing cable. Further, the effect of bearing stiffness makes the construction phase analysis more complex. An elegant and new analysis methodology which can account for the prestressing force and bearing stiffness in the determination of the state of stress in bridge deck sections during incremental launching is proposed in this paper. With the proposed method of ‘Transient Transfer Matrix’ (TTM), so named to indicate its transient nature during the launching process, these problems can be handled efficiently with minimal computational effort. This paper gives insights into the proposed method of analysis, formulation and parametric studies carried out to assess the effect of prestressing force and bearing stiffness on the stress state of incrementally launched bridges during construction.
 
Date 2009
2009
2006
 
Type Article
 
Identifier Engineering Structures vol.28, 2006, pp.1897–1910
http://hdl.handle.net/123456789/36
 
Language en
 
Rights It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
 
Publisher Elsevier