STATE OF THE ART FOR LONG SPAN PRESTRESSED CONCRETE BRIDGES OF SEGMENTAL CONSTRUCTION

PCI Journal ◽  
1971 ◽  
Vol 16 (5) ◽  
pp. 53-77 ◽  
Author(s):  
Geoffrey C. Lacey ◽  
John E. Breen ◽  
Ned H. Burns
Keyword(s):  
Prestressed Concrete ◽  
State Of The Art ◽  
Concrete Bridges ◽  
Prestressed Concrete Bridges ◽  
Long Span

scholarly journals MEASUREMENT OF DEFLECTION LINE ON BRIDGES

2013 ◽  
Vol 95 (1) ◽  
pp. 64-75
Author(s):  
Rudolf Urban ◽  
Martin Štroner
Keyword(s):  
Prestressed Concrete ◽  
Concrete Structures ◽  
Measurement Procedure ◽  
Concrete Bridges ◽  
Prediction Methods ◽  
Prestressed Concrete Bridges ◽  
Long Span ◽  
Bridge Structures

Abstract Prestressed concrete bridges are very sensitive to the increase in long-term deflections. Reliable forecasts of deflections of bridge structures during construction and durability are crucial for achieving good durability. The main results of measurements are the changes of the deflection line of the bridge structures, which places special demands on the measurement procedure. Results from measurements are very useful for the improvement of mathematical prediction methods of behaviour of long span prestressed concrete structures.

Influence of Prestress Degree to Long-Term Response of the Long Span Prestressed Concrete Bridges

2012 ◽  
Vol 256-259 ◽  
pp. 1542-1547
Author(s):  
Jun Xie ◽  
Yi Shu Zhou ◽  
Xiao Hua Zheng
Keyword(s):  
Prestressed Concrete ◽  
Concrete Bridges ◽  
Deformation Control ◽  
Prestressed Concrete Bridges ◽  
Long Span ◽  
Bridge Structures ◽  
Stress And Deformation ◽  
Critical Sections ◽  
Term Response

Though the prestress degree that is selected under control of the specified stress limit is a key design parameter in design of the prestressed concrete bridges, study on long-term deformation of the long span prestressed concrete beam bridges is not popular both here and abroad. This paper reveals the time-dependent regularity of long-term stress and deformation effect to the critical sections of the long span prestressed bridges from various prestress degrees, thereby the necessity of stress and deformation control consideration during design of the long span prestressed bridge structures is verified, and the prestressing expression based on stress and deflection control for relative study and design reference is given.

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