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~CHKPRS

 

~CHKPRS, Lab1, Lab2, DIRKEY, VAL1, VAL2, VAL3, VAL4, VAL5, VAL6, VAL7, VAL8, VAL9,VAL10

Checks prestressed concrete cross sections and shell vertex.

POST1: Prestressed concrete

Lab1, Lab2

Labels identifying the type of checking. These labels are related with the CHCKTYPE label used to retrieve results.

DIRKEY

Key identifying the bending plane and shear to be checked.

VALJ

Parameters that depends on the type of using code.

 

Lab1= SHT

~CHKPRS, SHT, Lab2, DIRKEY, , , , , , , , , VAL9

Checks shear and torsion on prestressed concrete cross sections. Valid labels are:

 

Lab2

Description

SHEAR

Shear checking. Torsional moment is not taken into account. (CHCKTYPE = CHKSH)

TORSION

Torsional checking. Shear is not taken into account. (CHCKTYPE = CHKTR)

BOTH

Both shear and torsional checking. Default value. (CHCKTYPE = CHKSHTR)

DIRKEY

Description

0

Shear checking along element Y direction (shear QY). Default value.

1

Shear checking along element Z direction (shear QZ).

 

If the active code is ACI 318-05 or ACI 349-01:

VAL9

Maximum steel strength force  

0

Restricts the value of the strength force up to the maximum provided in the code. Default value.

1

Strength force limitation ignored

 

Lab1= 2DB

~CHKPRS, 2DB, , DIRKEY

Checks axial force + bending on prestressed concrete cross sections. (CHCKTYPE = CHK2D)

Valid labels are:

DIRKEY

Description

0

Bending in XY local plane of element (Moments Mz). Default value.

1

Bending in XZ local plane of element (Moments My).

 

Lab1= CRACK

~CHKPRS, CRACK, , DIRKEY, VAL1, VAL2, VAL3, VAL4, VAL5

Cracking checking on prestressed concrete cross sections, according to the indicated direction. (CHCKTYPE = CRACK)

Valid labels are:

If the active code is EHE-98 or EHE-08:

VAL1

WMAX: Maximum crack width. If WMAX=0 CivilFEM will do a decompression checking, and the rest of arguments will be ignored.

VAL2

BETA: Coefficient relating the average crack width to the design value:

= 1.3 Restraint cracking.

= 1.7 Load induced cracking (by default).

VAL3

K2: Coefficient:

= 1.0 Pure tension.

= 0.5 Bending (by default).

 

If the active code is EC2-91:

VAL1

WMAX: Maximum crack width. If WMAX=0 CivilFEM will do a decompression checking, and the rest of arguments will be ignored.

VAL2

BETA: Coefficient relating the average crack width to the design value:

= 1.3 Restraint cracking.

= 1.7 Load induced cracking (by default).

VAL3

BET1: Coefficient bond properties of bars:

= 1.0 High bond bars (by default).

= 0.5 Plain bars.

VAL4

BET2: Coefficient duration of loading or repeated loading:

= 1.0 Single, short term loading.

= 0.5 Sustained load or for many cycles (by default).

VAL5

K1: Coefficient bond properties of bars:

= 0.8 High bond bars (by default).

= 1.6 Plain bars.

 

If the active code is EC2-08 or ITER:

VAL1

WMAX: Maximum crack width. If WMAX=0 CivilFEM will do a decompression checking, and the rest of arguments will be ignored.

VAL2

K1: Coefficient to take account of the influence of the bond properties of the bonded reinforcement:

= 0.8 High bond bars (by default).

= 1.6 Plain bars.

VAL3

KT: Coefficient to take account of the influence of the duration of the loading

= 0.4 Permanent or load (default value).

= 0.6 Short duration load.

VAL4

K3: Constant defined in the National Annexe.

= 3.4 (by default).

VAL5

K4: Constant defined in the National Annexe.

= 0.425 (by default)

 

If the active code is ACI 318-05:

VAL1

S: Spacing between reinforcement. If S=0 CivilFEM will do a decompression checking, and the rest of arguments will be ignored.

 

Lab1= SHELL

~ CHKPRS, SHELL, Lab2, , VAL1, VAL2, VAL3, VAL4, VAL5, VAL6, VAL7, VAL8, VAL9,VAL10

Checks shell vertices. Valid labels are:

Lab2

Description

SHEAR

Check radial shear reinforcement according to ACI 359-04. (CHCKTYPE = CHKSH).

VAL1

Load category:

= 0® Factored loads.

= 1® Service loads

VAL2

Force Classification:

= 0 or 1® Primary force.

= 2® Primary+Secondary forces.

= 3® Structural Integrity Test

VAL7

LSP, load step number of the existing loads.

VAL8

SSP, substep of the existing loads.

VAL9

Maximum steel strength force

= 0 Restricts the value of the strength force up to the maximum provided in the code. Default value.

= 1 Strength force limitation ignored.


CivilFEM will take the load steps from the RCV files defined with ~CFFILE2 command with NFILE=4.

If ~CFFILE2 command is not used, CivilFEM will look for the loadstep in the active results file.

 

TNG_SHR

Check tangential shear reinforcement (in plane shear) according to ACI 359-04 code. (CHCKTYPE =CHKTSH).

VAL1

Load category:

= 0® Factored loads.

= 1® Service loads.

VAL2

Force Classification:

= 0 or 1® Primary force.

= 2® Primary+Secondary forces.

= 3 ® Structural integrity Test.

VAL3

LSP, load step number where pressure, prestress and dead load are applied.

VAL4

SSP, substep number where pressure, prestress and dead load are applied.

VAL5

LSL, load step number where lateral loads are applied (earthquake, wind or tornado).

= -1 lateral loads are obtained by subtracting the dead loads from the main loads.

VAL6

 

SSL, substep number where lateral loads are applied (earthquake, wind or tornado).

VAL7

LST, load step number where thermal loads are applied.

= -1 no effective prestress is present and Vc=0

VAL8

SST, substep number where thermal loads are applied

VAL9

 

 

 

 

Maximum steel strength force

= 0 Restricts the value of the strength force up to the maximum provided in the code. Default value.

= 1 Strength force limitation ignored.

VAL10

Tangential shear strength limit RG 1.136 (SRP 3.8.1, Section II.5.A)

= 0 limit is ignored (default value).

= 1 limit is used


CivilFEM will take the load steps from the RCV files defined with ~CFFILE2 command. NFILE=1 sets the RCV file for LSP and SSP, NFILE=2 for LSL, SLL and NFILE=3 for LST and SST.

If ~CFFILE2 command is not used, CivilFEM will look for the loadsteps in the active results file.

 

BEND_AXL

Check for flexure and axial loads according to ACI 359-04 code. (CHCKTYPE = CHK2D).

VAL1

Load category:

= 0® Factored loads

= 1® Service loads.

VAL2

 

 

 

 

 

 

 

Force Classification:

= 0 or 1® Primary force.

= 2® Primary+Secondary forces.

= 3® Primary+SIT

= 4® Primary+Secondary forces+SIT

= 5® Primary+SIT (RG 1.90)

= 6® Primary+Secondary forces+SIT (RG 1.90)

VAL3

Stress strain diagram:

= blank ® diagram selected as the Design Diagram in the Material (civil preprocessor> materials)

= 0® User defined

= 1® PCA parabolic

= 2® Rectangular

= 3® Linear ACI359

= 4® Parabolic ACI359

VAL9

Maximum steel strength force

= 0 Restricts the value of the strength force up to the maximum provided in the code. Default value.

= 1 Strength force limitation ignored.

      

Notes

- Checking is done for the element ends (cross sections, shell vertices or solid sections) of selected elements at the moment of command execution.

- All calculations are performed according to the active code (see ~CODESEL command).

- The description of the calculation process used can be found in the Theory Manual.

- Tha analysis results are stored in the CivilFEM results file as an alternative. The available results are the following:

 

If active code is EC2-91:

CHCKTYPE

CHK2D: Checking for bending and axial force.

Results

Description

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSH: Checking for shear.

Results

Description

VRD1

Design shear resistance without considering the reinforcement in the section.

CRVRD1

Ratio of the design shear force (VSd) to the resistance VRd1.

VRD2

Maximum design shear force that can be carried without crushing of the concrete compressed struts.

CRVRD2

Ratio of the design shear force (VSd) to the resistance VRd2

VWD

Contribution of the necessary shear reinforcement

VRD3

Design shear resistance that can support a section with shear reinforcement

CRVRD3

Ratio of the design shear force (VSd) to the resistance VRd3.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

TENS

Tensile stress in bending reinforcement.

 

CHCKTYPE

CHKTR: Checking for torsion.

Results

Description

TRD1

Maximum torsional moment that can be resisted by the compression struts of the concrete.

CRTRD1

Ratio of the design torsional moment (TSd) to the resistanceTRd1.

TRD2

Maximum torsional moment that can be resisted by the torsional reinforcement.

CRTRD2

Ratio of the design torsional moment (TSd) to the resistanceTRd2.

ALT

Required torsional longitudinal reinforcement.

CRTALT

Ratio of the torsional longitudinal reinforcement required to the torsional longitudinal reinforcement defined.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSHTR: Checking for combined shear and torsion.

Results

Description

VRD1

Design shear resistance without considering the reinforcement in the section.

CRVRD1

Ratio of the design shear force (VSd) to the resistance VRd1.

VRD2

Maximum design shear force that can be carried without crushing of the concrete compressed struts.

CRVRD2

Ratio of the design shear force (VSd) to the resistance VRd2.

VWD

Contribution of the necessary shear reinforcement.

VRD3

Design shear resistance that can support a section with shear reinforcement.

CRVRD3

Ratio of the design torsional moment (VSd) to the resistance VRd3.

CRTSHR

Shear criterion.

TENS

Tensile stress in bending reinforcement.

TRD1

Maximum torsional moment that can be resisted by the compression struts of the concrete.

CRTRD1

Ratio of the design torsional moment (TSd) to the resistanceTRd1.

TRD2

Maximum torsional moment that can be resisted by the torsional reinforcement.

CRTRD2

Ratio of the design torsional moment (TSd) to the resistanceTRd2.

ALT

Required torsional longitudinal reinforcement.

CRTALT

Ratio of the torsional longitudinal reinforcement required to the torsional longitudinal reinforcement defined.

CRTTRS

Torsional criterion.

CRTCST

Criterion for the ultimate compression strength of the concrete due to combined shear and torsion.

CRT_TOT

Combined shear and torsion criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CRACK: Checking for cracking

Results

Description

ESM

Mean strain. (Not valid for decompression checking).

SRM

Average final crack spacing. (Not valid for decompression checking).

WK

Design crack width. (Not valid for decompression checking).

SIGMA

Maximum tensile stress.

CRT_TOT

Cracking criterion.

POS

Cracking position inside the section. (Not valid for decompression checking).

ELM_OK

OK and not OK elements.

 

If active code is EC2-08 or ITER:

CHCKTYPE

CHK2D: Checking for bending and axial force.

Results

Description

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSH: Checking for shear.

Results

Description

VRDC

Design shear resistance without considering the reinforcement in the section (VRd,c).

CRT_1

Ratio of the design shear force (VEd) to the resistance VRd,c.

VRDS

Design shear resistance of shear reinforcement (VRd,s).

CRT_2

Ratio of the shear force VEd to the resistance VRd,s.

VRDMAX

Maximum design shear force that can be carried without crushing of the concrete compressed struts (VRd,max).

CRT_3

Ratio of the shear force VEd to the resistance VRd,max.

TENS

Tensile forces in longitudinal reinforcement.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKTR: Checking for torsion.

Results

Description

TRDMAX

Maximum torsional moment that can be resisted by the compression struts of the concrete (TRd,max).

CRT_1

Ratio of the design torsional moment (TEd) to the resistance TRd,max.

TRD

Maximum torsional moment that can be resisted by the torsional reinforcement (TRd).

CRT_2

Ratio of the moment TEd  to the resistance TRd.

ALT

Required torsional longitudinal reinforcement.

CRTALT

Ratio of the torsional longitudinal reinforcement required to the torsional longitudinal reinforcement defined.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSHTR: Checking for combined shear and torsion.

Results

Description

VRDC

Design shear resistance without considering the reinforcement in the section (VRd,c).

CRT_1

Ratio of the design shear force (VEd) to the resistance VRd,c.

VRDS

Design shear resistance of shear reinforcement (VRd,s).

CRT_2

Ratio of the shear force VEd to the resistance VRd,s.

VRDMAX

Maximum design shear force that can be carried without crushing of the concrete compressed struts (VRd,max).

CRT_3

Ratio of the shear force VEd to the resistance VRd, max.

TENS

Tensile forces in longitudinal reinforcement.

CRTSHR

Shear criterion.

TRDMAX

Maximum torsional moment that can be resisted by the compression struts of the concrete (TRd, max).

CRT_4

Ratio of the design torsional moment (TEd) to the resistance TRd, max.

TRD

Maximum torsional moment that can be resisted by the torsional reinforcement (TRd).

CRT_5

Ratio of the moment TEd  to the resistance TRd.

ALT

Required torsional longitudinal reinforcement.

CRTALT

Ratio of the torsional longitudinal reinforcement required to the torsional longitudinal reinforcement defined.

CRTTRS

Torsional criterion.

CRT_6

Resistance criterion to combined torsion and shear

 (CRT_3 + CRT_4)

CRT_TOT

Combined shear and torsion criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CRACK: Checking for cracking.

Results

Description

SIGMA

Maximum tensile stress.

WK

Design crack width. Not valid for decompression checking.

SRMAX

Maximum crack spacing. Not valid for decompression checking.

EM

Difference between the mean strains in the reinforcement and in the concrete. Not valid for decompression checking.

POS

Cracking position inside the section. Not valid for decompression checking.

1

Upper fiber.

-1

Lower fiber.

0

Upper and lower fibers.

CRT_TOT

Cracking criterion.

ELM_OK

OK and not OK elements.

 

If active code is EHE-98 or EHE-08:

CHCKTYPE

CHK2D: Checking for bending and axial force.

Results

Description

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSH: Checking for shear.

Results

Description

VU1

Ultimate shear resistance due to oblique compression of concrete in web.

CRTVU1

Ratio of the design shear (Vrd) to the resistance Vu1.

VCU

Contribution of concrete to shear resistance.

VSU

Contribution of the web shear transverse reinforcement to the shear resistance.

VU2

Ultimate shear resistance due to tension in the web.

CRTVU2

Ratio of the design shear (Vrd) to the resistance Vu2.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

INCTENS

Increment in tension due to shear.

 

CHCKTYPE

CHKTR: Checking for torsion.

Results

Description

TU1

Maximum torsional moment that can be resisted without crushing due to compression of the concrete.

CRTTU1

Ratio of the design torsional moment (TSd) to the resistance Tu1.

TU2

Maximum torsional moment that can be resisted without crushing due to tension of transverse reinforcement.

CRTTU2

Ratio of the design torsional moment (TSd) to the resistance Tu2.

TU3

Maximum torsional moment that can be resisted without crushing due to tension of longitudinal reinforcement.

CRTTU3

Ratio of the design torsional moment (TSd) to the resistance Tu3.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSHTR: Checking for combined shear and torsion.

Results

Description

VU1

Ultimate shear resistance due to oblique compression of concrete in web.

CRTVU1

Ratio of the design shear (Vrd) to the resistance Vu1.

VCU

Contribution of concrete to shear resistance.

VSU

Contribution of the web shear transverse reinforcement to the shear resistance.

VU2

Ultimate shear resistance due to tension in the web.

CRTVU2

Ratio of the design shear (Vrd) to the resistance Vu2.

CRTSHR

Shear criterion.

INCTENS

Increment in tension due to shear.

TU1

Maximum torsional moment that can be resisted without crushing due to compression of the concrete.

CRTTU1

Ratio of the design torsional moment (TSd) to the resistance Tu1.

TU2

Maximum torsional moment that can be resisted without crushing due to tension of transverse reinforcement.

CRTTU2

Ratio of the design torsional moment (TSd) to the resistance Tu2.

TU3

Maximum torsional moment that can be resisted without crushing due to tension of longitudinal reinforcement.

CRTTU3

Ratio of the design torsional moment (TSd) to the resistance Tu3.

CRTTRS

Torsional criterion.

CRTCST

Criterion for the ultimate compression strength of the concrete due to combined shear and torsion.

CRT_TOT

Combined shear and torsion criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CRACK: Checking for cracking

Results

Description

ESM

Mean strain. (Not valid for decompression checking).

SRM

Average final crack spacing. (Not valid for decompression checking).

WK

Design crack width. (Not valid for decompression checking).

SIGMA

Maximum tensile stress.

CRT_TOT

Cracking criterion.

POS

Cracking position inside the section. (Not valid for decompression checking).

ELM_OK

OK and not OK elements.

 

If active code is ACI 318-05:

CHCKTYPE

CHK2D: Checking for bending and axial force.

Results

Description

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSH: Checking for shear.

Results

Description

VC

Shear strength provided by concrete.

VS

Shear resistance provided by shear reinforcement.

VN

Nominal shear resistance.

VFI

Product of the nominal shear strength by the section strength reduction factor.

CRTVN

Ratio of the design shear (Vu) to the shear nominal strength Vn.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKTR: Checking for torsion.

Results

Description

CRTTC

Concrete failure criterion.

TN

Torsional nominal resistance.

ALT

Area of torsional longitudinal reinforcement required in accordance with the torsion transverse reinforcement defined.

TFI

Product of the nominal torsional moment strength by the section strength reduction factor.

CRTALT

Ratio of the torsional longitudinal reinforcement required to the torsional longitudinal reinforcement defined.

CRTTN

Ratio of the design torsional moment (Tu) to the nominal torsional strength (Tn).

CRT_TOT

Criterion for section’s resistance.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKSHTR: Checking for combined shear and torsion.

Results

Description

VC

Shear strength provided by concrete.

VS

Shear resistance provided by shear reinforcement.

VN

Nominal shear resistance.

VFI

Product of the nominal shear strength by the section strength reduction factor.

CRTVN

Ratio of the design shear (Vu) to the shear nominal strength Vn.

CRTSHR

Shear criterion.

CRTTC

Concrete failure criterion.

TN

Torsional nominal resistance.

ALT

Area of torsional longitudinal reinforcement required in accordance with the torsion transverse reinforcement defined.

TFI

Product of the nominal torsional moment strength by the section strength reduction factor.

CRTALT

Ratio of the torsional longitudinal reinforcement required to the torsional longitudinal reinforcement defined.

CRTTN

Ratio of the design torsional moment (Tu) to the nominal torsional strength (Tn).

CRTTRS

Torsional criterion.

CRT_TOT

Section strength criterion.

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CRACK: Checking for cracking

Results

Description

S

Design reinforcement spacing. (Not valid for decompression checking).

FS

Reinforcement stress. (Not valid for decompression checking).

SIGMA

Maximum tensile stress.

CRT_TOT

Cracking criterion.

POS

Cracking position inside the section. (Not valid for decompression checking).

ELM_OK

OK and not OK elements.

 

If active code is ACI 359-04:

CHCKTYPE

CHKSH: Radial shear checking on shells

Results

Description

VC_X

Allowable shear stress in concrete, X direction.

VS_X

Minimum shear strength to be provided by shear reinforcement, X direction.

VU_X

Nominal shear strength, X direction

CRT_X

Radial shear criterion, X direction

VC_Y

Allowable shear stress in concrete, Y direction.

VS_Y

Minimum shear strength to be provided by shear reinforcement, Y direction.

VU_Y

Nominal shear strength, Y direction

CRT_Y

Radial shear criterion, Y direction

CRT_TOT

Total Radial Shear Criterion

ELM_OK

OK and not OK elements.

 

CHCKTYPE

CHKTSH: Tangential shear (in plane) checking on shells.

Results

Description

VC

Shear strength provided by concrete.

CRT_ASX

In plane shear criterion, X direction.

CRT_ASY

In plane shear criterion, Y direction.

CRT_ASO

Orthogonal reinforcement limit criterion.

CRT_TOT

Total Tangential Shear criterion.

 

CHCKTYPE

CHK2D: Flexure and axial loads checking on shells.

Results

Description

CRT_X

Flexure and axial criterion, X direction.

CRT_Y

Flexure and axial criterion, Y direction.

ELM_OK

OK and not OK elements.

Menu Path

Main Menu > Civil Postprocessor > Prestress Concrete Post > Code Checking> ###### > Check by code > Beams & Solid

Main Menu > Civil Postprocessor > Prestress Concrete Post > Code Checking> ###### > Check by code > Shells

Where ###### represents the active code (prestressed concrete).

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