Economization of precast prestressing beams of type "I" at Bridges

Session

Civil Engineering, Infrastructure and Environment

Description

Considering the large application in the construction of the Bridge superstructure, their serial production at the factory, as well as accelerating the dynamic construction plan, economization of precast prestressed beams at serial highway bridges or long bridges is very necessary, therefore the purpose of this research is to analyze some variants in order to economize these types of beams which would also affect the cost of construction as a very important factor. The treatment and analysis of these bridge superstructure bearing elements is based on the Eurocode 2 standard (Design of concrete structures and concrete bridges; EN 1992-1-1:2004 and EN 1992-2:2004), and Eurocode 1 for loads (Actions in structures - Part 2: Traffic loads on bridges; EN 1991-2:2003). This paper contains general knowledge about precast prestressed structure elements and their use in general, their application in the construction of bridge superstructure, examples where beams with different dimensions are treated in order to achieve the

greatest possible economization of these precast prestressed elements. The precast prestressed –I- beam elements are treated according to SLS (Serviceability Limit State) analyzing and calculating

the necessary prestressing reinforcement , maximum stresses controls, calculating all types of losses both short-term and long-term; as well as they are treated according to ULS (Ultimate Limit State). With this paper it is possible to gain general knowledge on the application of precast prestressing beams on bridges, methods of their analysis and the possibility of their economization for serial production.

Keywords:

Bridges, prestressing, economization, serial production

Proceedings Editor

Edmond Hajrizi

ISBN

978-9951-550-50-5

Location

UBT Kampus, Lipjan

Start Date

29-10-2022 12:00 AM

End Date

30-10-2022 12:00 AM

DOI

10.33107/ubt-ic.2022.206

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Oct 29th, 12:00 AM Oct 30th, 12:00 AM

Economization of precast prestressing beams of type "I" at Bridges

UBT Kampus, Lipjan

Considering the large application in the construction of the Bridge superstructure, their serial production at the factory, as well as accelerating the dynamic construction plan, economization of precast prestressed beams at serial highway bridges or long bridges is very necessary, therefore the purpose of this research is to analyze some variants in order to economize these types of beams which would also affect the cost of construction as a very important factor. The treatment and analysis of these bridge superstructure bearing elements is based on the Eurocode 2 standard (Design of concrete structures and concrete bridges; EN 1992-1-1:2004 and EN 1992-2:2004), and Eurocode 1 for loads (Actions in structures - Part 2: Traffic loads on bridges; EN 1991-2:2003). This paper contains general knowledge about precast prestressed structure elements and their use in general, their application in the construction of bridge superstructure, examples where beams with different dimensions are treated in order to achieve the

greatest possible economization of these precast prestressed elements. The precast prestressed –I- beam elements are treated according to SLS (Serviceability Limit State) analyzing and calculating

the necessary prestressing reinforcement , maximum stresses controls, calculating all types of losses both short-term and long-term; as well as they are treated according to ULS (Ultimate Limit State). With this paper it is possible to gain general knowledge on the application of precast prestressing beams on bridges, methods of their analysis and the possibility of their economization for serial production.