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~PCTNDEF

 

~PCTNDEF, UTP, MAT, ATN, DSH, P0MAX, P0,SIGcp

Defines and inserts a tendon.

PREP7 : PRESTRESSED CONCRETE: Tendon editor

UTP

Tendon number assigned by the user.

MAT

Prestressing steel material number.

ATN

Area of each tendon.

DSH

Casing diameter.

P0MAX

Initial tendon tensile force (the default value is assigned according to the active code). It is the anchorage tensile force plus an over- tensioning. It corresponds to the maximum load to which the tendon is subjected..

P0

Anchorage tensile force of the tendon (the default value is assigned according to the active code).

SIGcp

Stress in the concrete fiber adjacent to the tendon for the creep losses calculation (default value SIGcp = 5 MPa).

Notes

- After the prestressing actions have been applied using the SOLVE or the ~CFLSWRT commands, the number of tendons or cuts cannot be changed and therefore this command will be ignored.

- If P0MAX and P0 are left blank, the following values will be used, using the active code double limitation:

-          P0MAX force at the anchorage, before the stresses transference:

	Eurocode No.2	ACI-318	EHE
Referred to the yield strength	0.90	0.94	0.95
Referred to the ultimate strength	0.80	0.80	0.85

-          P0 force after the stresses transference:

	Eurocode No.2	ACI-318	EHE
Referred to the yield strength	0.85	0.82	0.90
Referred to the ultimate strength	0.75	0.70	0.75

  These forces are calculated from the previous stresses limitations and the area assigned to the tendon.

  It is important to take into account that these values are calculated when the tendon is created. If the tendon area is latter modified (~PCTNMDF) these forces will not be recalculated (a decrease of the area hill mean not to fulfill the code and an increase of the area will give low stresses in the tendon).

Menu Paths

Main Menu > Civil Preprocessor> Prestress Concrete Prep > Tendons > Tendon Editor

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