22-01-2013, 12:18 PM
General Principles of Prestressed Concrete
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General Principles
Second Concept: Internal Resisting Couple
Method
Prestressed concrete as a combination of steel
and concrete
Internal Resisting Couple:
Concrete takes compression
Steel takes tension
Internal Resisting Couple Method
The beam is analyzed as if it were a plain
concrete elastic beam using the basic
principles of statics
C-Line: Line-of-pressure in the concrete
T-Line: c.g. of steel line
Section equilibrium equations:
C-Line Method
C-Line Method used for:
Determining Ultimate Strength
Elastic Behaviour as well