2024年4月6日发(作者：厉怜南)
SimulationofPullTestsforGroutedCableAnchors9-1
9SimulationofPullTestsforGroutedCableAnchors
9.1ProblemStatement
Themostcommonmethodfordeterminationofcableboltpropertiesistoperformpull-outtestson
smallsegmentsofgroutedcablesinthefilly,segmentsfrom10to50cminlengthare
softhesesegmentsarepulledwithajackmountedtothesurface
ceappliedtothe
cable,andthedeformationofthecable,areplottedtoproduceanaxialforce-defl
thiscurve,thepeakshearstrengthofthegroutbondisdeterminedandconvertedtoastrengthin
tons/mcablelength.
Theresultsforpulltestsonone-halfmetersegmentsofseveraltypesofcablesareillustratedin
lotsareexpressedintermsoftons/cables,
awater/cementratioofone-thirdwasused.
30
25
20
F
o
r
c
e
(
t
o
n
s
/
m
)
15
10
5
0
15.2 mm
2 x 15.2 mm
24 mm
26 mm
05101520
Displacement (mm)
2530
Figure9.1Fieldresultsforpulltestsonvarioustypesofcablesforabond
lengthof0.5mandawater/cementratioof1/3
FLACVersion8.0
9-2ExampleApplications
Thepropertiesoftypicalconcrete-reinforcingtendonsaregiveninTable9.1:
Table9.1
Nominal
diameter(mm)
15
19
23
26
29
32
35
38
Nominal
mass(kg/m)
1.54
2.42
3.49
4.43
5.48
6.64
7.91
9.29
Typicalstrandedcableproperties
Nominal
area(mm
2
)
177
283
415
530
660
804
962
1140
Grade
Super
Super
Reg
Super
Reg
Super
Reg
Super
Reg
Super
Reg
Super
Reg
Super
Force(kN)atthefollowing
%ofultimatetensilestrength
55%65%75%100%
105
170
235
250
300
315
375
390
455
480
545
570
645
675
125
200
280
295
355
370
440
460
540
565
645
675
765
800
145
230
325
340
410
430
510
535
625
655
745
780
880
925
190
305
430
450
545
570
680
710
830
870
990
1040
1175
1230
Inthisexampleproblem,FLACisusedtomodeltheprevioustestsandreproducethefi
notedthatthecurrentcableboltmodelinFLACdescribestheresponseofthecable-rockinteraction
elassumesthegroutbehavesasanelastic,perfectly
plasticmaterialwithconfiningstressdependence,field
,Kaiseretal.1992)hasshownthatdilationintroducedbythespiralcable
haviorisnotaddressedhere,butcould
mplexbehaviorcanalsobesimulated
tion1.6.4.1inStructuralElementsforexamplepullout
testsusingrockboltelements.
FLACVersion8.0
2024年4月6日发(作者：厉怜南)
SimulationofPullTestsforGroutedCableAnchors9-1
9SimulationofPullTestsforGroutedCableAnchors
9.1ProblemStatement
Themostcommonmethodfordeterminationofcableboltpropertiesistoperformpull-outtestson
smallsegmentsofgroutedcablesinthefilly,segmentsfrom10to50cminlengthare
softhesesegmentsarepulledwithajackmountedtothesurface
ceappliedtothe
cable,andthedeformationofthecable,areplottedtoproduceanaxialforce-defl
thiscurve,thepeakshearstrengthofthegroutbondisdeterminedandconvertedtoastrengthin
tons/mcablelength.
Theresultsforpulltestsonone-halfmetersegmentsofseveraltypesofcablesareillustratedin
lotsareexpressedintermsoftons/cables,
awater/cementratioofone-thirdwasused.
30
25
20
F
o
r
c
e
(
t
o
n
s
/
m
)
15
10
5
0
15.2 mm
2 x 15.2 mm
24 mm
26 mm
05101520
Displacement (mm)
2530
Figure9.1Fieldresultsforpulltestsonvarioustypesofcablesforabond
lengthof0.5mandawater/cementratioof1/3
FLACVersion8.0
9-2ExampleApplications
Thepropertiesoftypicalconcrete-reinforcingtendonsaregiveninTable9.1:
Table9.1
Nominal
diameter(mm)
15
19
23
26
29
32
35
38
Nominal
mass(kg/m)
1.54
2.42
3.49
4.43
5.48
6.64
7.91
9.29
Typicalstrandedcableproperties
Nominal
area(mm
2
)
177
283
415
530
660
804
962
1140
Grade
Super
Super
Reg
Super
Reg
Super
Reg
Super
Reg
Super
Reg
Super
Reg
Super
Force(kN)atthefollowing
%ofultimatetensilestrength
55%65%75%100%
105
170
235
250
300
315
375
390
455
480
545
570
645
675
125
200
280
295
355
370
440
460
540
565
645
675
765
800
145
230
325
340
410
430
510
535
625
655
745
780
880
925
190
305
430
450
545
570
680
710
830
870
990
1040
1175
1230
Inthisexampleproblem,FLACisusedtomodeltheprevioustestsandreproducethefi
notedthatthecurrentcableboltmodelinFLACdescribestheresponseofthecable-rockinteraction
elassumesthegroutbehavesasanelastic,perfectly
plasticmaterialwithconfiningstressdependence,field
,Kaiseretal.1992)hasshownthatdilationintroducedbythespiralcable
haviorisnotaddressedhere,butcould
mplexbehaviorcanalsobesimulated
tion1.6.4.1inStructuralElementsforexamplepullout
testsusingrockboltelements.
FLACVersion8.0