2015 10 06_sem_pref_kimura_precast_seminar_in_santiago_final

1
Application of High-Strength and
High-Performance Fiber Reinforced
Concrete to Precast Elements
International Seminar on Design and Construction
of Precast Structures in Seismic Regions
October 2015, Chile
Hideki Kimura
Senior Chief Researcher, Dr.Eng
R & D Institute
Takenaka Corporation

2
Contents of today’s speechContents of today’s speech
1. Introduction
2. Classification of FRCC
3. Application of Fiber Reinforced HSC
3.1 High Rise Building Columns
3.2 Slender Columns
3.3 B/C Joint in Precast Systems
4. Application of UFC
4.1 Bridge Precast Elements
4.2 Offshore Structures
4.3 Precast Plates or Forms
5. Application of HPFRCC (ECC)
5.1 Precast Coupling Beams in Buildings
5.2 Retrofit Projects

3
Tukuda island, Tokyo water frontTukuda island, Tokyo water front
1. Introduction1. Introduction
Tokyo SceneTokyo Scene

4
Evolution of
High Strength Concrete
is
Evolution of
High Rise RC buildings
Evolution of
High Strength Concrete
is
Evolution of
High Rise RC buildings

5
1970 1975 1980 1985 1990 1995 2000 2005
0
10
20
30
40
50
Number
Year （end of structural design evaluation)
RCResponse controled structures：68 buildings
RCSeismic isolation structures：75 buildings
RC Seismic structures：369 buildings
Seismic Resistant Seismic Control Seismic Isolation
Energy
absorption
Energy
absorption
Large
drift
Small
drift
Large
displacement
Displacement
as solid body
Isolation
bearing
Transition of Number of High-Rise RC Buildings
Designed Year (at the end of appraisal)
Evolution of high-rise RC buildingsEvolution of high-rise RC buildings
Number
of
Building
/ BCJ data
/ Over 60m high
/ Total number exceeded 500

6
Transition of concrete strengthTransition of concrete strength
0
20
40
60
80
100
120
140
160
1970 1975 1980 1985 1990 1995 2000 2005
設計年
コンクリート設計基準強度Fc　[N/mm
2
]
実績最大値
各年最大値
各年平均値
各年最小値
Specifieddesignstrength
Fc(MPa)
Year (end of structural design evaluation)
Maximum past record
Annual maximum value
Annual average value
Annual minimum value
New RC
Project
Evolution of high-strength materialsEvolution of high-strength materials
Research
on FRCC

7
Year Keywords
1970
1975
1980
1985
1990
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
Structural Planning
Frame Structure
1986 Hikarigaoka D5 (30F)
Early Development of High-rise
RC Buildings as Takenaka Corporation
Concrete strength Fc42 , Height 88m
1996 Bellemarge Sakai (43F)
Double Tube Structure
1997 Park City Suginami(28F)
High-rise RC Structure using Seismic Isolation
System Concrete strength Fc48 , Height 87m
2003 D’Grafort Kobe Sannomiya(43F)
Takenaka Hybrid Flat Slub System
of World extreme height
27,300
31,800
光が丘D5
27,300
31,800
光が丘D5
20,600
45,000
六甲アイランド3番街
20,600
45,000
六甲アイランド3番街
20,600
29,000
グランコリーナ西神南
22,930
40,200
京阪くずはT棟
32,500
32,500
ディーグラフォート神戸三宮
32,500
32,500
ディーグラフォート神戸三宮
2001 KuzuhaTower City
T Building (42F)
Early Development
Of High-riseRC
Buildings
Realization of High
strength concrete
Fc42
High strength
concrete Fc70
High-rise RC
Structure using
Seismic Isolation
System
High strength
concrete Fc100
Takenaka Hybrid
Flat Slub System
Super FlexSuper Flex
TubeTube
StructureStructure
To the height
200m
Double Tube
Structure
Seismic Isolation
System
(Free Plan)
Seismic Isolation
System(Free Plan)
2002 RenaissanceTower
Ueno Ikenohata (38F)
Super Flex Tube Structure using a damper
2005 Musashi Kosugi plan
(59F，47F)　 Height 201m
（ Advanced High Performance Concrete ）
SUPERSUPER　　FLEX STRUCTURESFLEX STRUCTURES
Using of Structural Wall
History of High-Rise RC Buildings of TakenakaHistory of High-Rise RC Buildings of Takenaka

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High-rise building with Complex Floor PlanHigh-rise building with Complex Floor Plan
■Outline
/ Use: Condimunium
/ Location: Osaka
/ No. of Story: 42F (B1F)
/ Maximum Height: 136.8 m
/ Total Floor Area: 32,720 m2
/ Construction Period : 2001.3～2003.12
/ Structure: Reinforced Concrete
with Base Isolation System
/ Max. Concrete Strength
: Fc 80 Mpa

9Base Isolated Super High-rise RC Building Composed
of Three Connected Towers with Vibration Control Systems
(Winner of fib 2010 Awards for
Outstanding Structures )
◆ Island Tower Sky Club

10
Outline of Structure
< Techniques Used >
1)Three Tower
Connecting System
2) Precast Concrete
System with 70 Mpa
Concrete
3) Core Wall System
4) Base Isolation
System
5) Dampers of the Sky
Garden truss
6) Dampers of the
upper stories
(Zinc-Alminum alloy
dampers)
◆42-story residential
building(2008)
ハイブリッド基礎免震
鋼管場所打ち
コンクリート拡底杭
スカイガーデン
(鉄骨ﾄﾗｽ構造)
制振装置
・ブロードバンドダンパー
・オイルダンパー
鉄骨中実柱
（200～250φ）
制振ダンパー
（亜鉛アルミダンパー）
高層
ｿﾞｰﾝ
1FL
基礎
Fc32 杭
フラットスラブ
(ボイドスラブ)
コンクリート強度
6FL
11FL
16FL
21FL
27FL
極厚耐震壁
(コア部分)
Fc70
Fc48
Fc60
Fc54
Fc48
Fc39
Fc30
中層
ｿﾞｰﾝ
低層
ｿﾞｰﾝ
鉄骨中実柱
（200～250φ）
High-rise
zone
中層
ｿﾞｰﾝ
低層
ｿﾞｰﾝ
Low-rise
zone
Foundation
Piles
Vibr ation control device
(zinc aluminum damper)
Seamless steel
columns(~250 dia.)
Flatslab
(void slab)
Box shape RC walls
(core area)
Sky-Garden
(steel truss structure)
Vibration control device
(viscoelastic damper)
(oil damper)
Base-isolated foundations
Steel tube in-situ driven
concrete enlarged base
piles
Medium-rise
zone
Precastconcrete
(colum,beam,slab)
Bending restoration beam
(SRC:15th,26th,37th floor)
m145.3m
Vibration Control Device
(Zinc-Aluminium Alloy Damper)
Sky Garden
(Steel Truss Structure)
Extremely slender steel columns
Vibration Control Device
(Broad-Band Damper)
(Oil Damper)
Flatslab
(No Beams)
Super-Flex-Wall Frame
(Core Wall)
Bending Restoration Beam
(SRC:15th,26th,37th Floor)
Precast Concrete
(Column,Beam,Slab)
Cast-in-place concrete pile
with outer Steel Tube
Base Isolation System
Low
Story
Zone
High
Story
Zone
Medium
Story
Zone

11
Ordinary High Strength ConcreteOrdinary High Strength Concrete
Separation and
fall down of
cover due to
lateral
displacement
★Premature Cover Spalling★Less Fire Resistance

12
2. Classification of Fiber
Reinforced Cementitious
Composites
2. Classification of Fiber
Reinforced Cementitious
Composites

13
FRCC : Fiber Reinforced Cementitious Composites
Classification of Fiber Reinforced
Cementitious Composites
Classification of Fiber Reinforced
Strength(Low) (High)
Ductility(Low)(High)
DFRCC:Ductile Fiber Reinforced Cementitious Composite
FRC:Fiber Reinforced Concrete
UFC:Ultra High
Strength Fiber
Reinforced Concrete
Pseudo strain
hardening
characteristics
under uni-axial
tensile stress
HPFRCC : High Performance Fiber
Reinforced Cement Composites with
multiple fine cracks
ECC: Engineered
Deflection
hardening
characteristics
under bending
stress
Strain softening
characteristics
under tensile
stress ★
★
★
★
(SHCC in
RILEM)
(RPC in
France)

14
Behavior of Different Classes of FRCBehavior of Different Classes of FRC
Tensile Stress-Crack
Opening Behavior of
Different Classes of
Fiber Reinforced
Concrete
Tensile Stress-Crack
Opening Behavior of
Different Classes of
Fiber Reinforced
Concrete

15
JSCE Recommendations for UFC and HPFRCCJSCE Recommendations for UFC and HPFRCC
Recommendations for Design and Construction of High
Performance Fiber Reinforced Cement Composite with
Multiple Fine Cracks (HPFRCC), 2007
Recommendations for Design and Construction of Ultra
High-Strength Fiber Reinforced Concrtee Structures
(Draft), 2006
UFC
(Ultra High-Strength Fiber
Reinforced Concrete)
HPFRCC
(High Performance Fiber
Reinforced Cement Composite)

16
◆First Practical Application of
150MPa SFRC to Building
◆First Practical Application of
150MPa SFRC to Building
3.1 High-rise Building Columns3.1 High-rise Building Columns
3. Application of Fiber
Reinforced HSC
3. Application of Fiber
Reinforced HSC

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Use: Condominium
Location: Kanagawa Pref.
No. of Story: 59F (B1, PF2F)
Height of Building: 197.6 m
Maximum Height: 203.5 m
Total Floor Area: 103,670 m2
Structure: RC Moment Frames
with Vibration Control Devices
Concrete Strength: Fc150 MPa
Main Bar: SD678 (y: 685MPa)
Design: Takenaka Corporation
Construction:
Takenaka Corporation
Construction Period:
2005.10 – 2009.4
Park City Musashi Kosugi Building
Park City Musashi Kosugi BuildingPark City Musashi Kosugi Building
Building
D
Building
E
(Winner of fib 2014 Awards for Outstanding Structures )

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Steel structure
Column, beam,
joint: precast
olumn
Non-column space
9.6mx31.6m
Balcony: precast
Visco-elastic
damper wall
Mega-frame
Spancrete
composite slab
Column SRC,
Beam S
Concrete: 150MPa
Steel bar: 685MPa
Mega-frame
Composite wall
Wall pier
Piled raft
Spancrete
composite slab
Column, beam:
precast
Balcony: precast
Staircase:
precastBalcony: precastFloor: deck plate
Damper column
3F – 10F
Large span
super frame
Visco-elastic
damper wall
3F – 38FTypical Floor PlanSection
Outline of StructureOutline of Structure

19
Column
Section
Casting
Column
Concrete
as of May 28 2007
Application of 150MPa ConcreteApplication of 150MPa Concrete

20
Specified strength
Fc150N/mm2
Core from solid (91d)
Insulated curing (91d)
Standard curing (56d)
● Core (91days)
○ Core (28days)
Compressive strength (N/mm2)
Height (mm)
Curtain on the building wall
says
“Strongest Concrete in the
World (150N/mm2)”
“One coin area of concrete
can support the weight of an
elephant”
Strength of Concrete Core
Strongest practiced concrete in the worldStrongest practiced concrete in the world

21
Silica fume cement High-range water reducer
Conventional technique New technique
High-range water reducer
Silica fume
Cement Cement
Break up
Repulsion
Application of 150MPa ConcreteApplication of 150MPa Concrete

22
Ordinary
high-strength
concrete
Advanced
fire-resistant
concrete
Fire Resistant ConcreteFire Resistant Concrete

23
Steel Fiber Reinforced Concrete
Ordinary High-strength Concrete Advanced Performance Composite
Steel
fiber
Prevention of
separation and
fall down of
concrete
Separation and
fall down of
concrete due to
lateral
displacement
Prevention of Cover spallingPrevention of Cover spalling

24
PC区分図
フルPCバルコニー版
仕口一体型PC梁１
PC柱
PC柱（コーナー）
仕口一体型PC梁2
コーナーPC梁
凡例
　　　　　　　柱PC
　　　　　　　　梁PC
　　　　　　　　バルコニーPC
PC区分図
PC柱
コーナーPC梁
凡例
　　　　　　　柱PC
　　　　　　　　梁PC
PC柱
コーナーPC梁
凡例
　　　　　　　柱PC
　　　　　　　　梁PC
Column
Beam
Balcony
Column
Balcony
Beam with Beam-column Joint
Beam with Beam-column Joint
Corner Beam with Tile-coating
Column with Tile-coating
LEGEND
Precast Concrete ElementsPrecast Concrete Elements

25
Column Test
using 150 Mpa SFRC
Column Test
using 150 Mpa SFRC

26
Laboratory test of structural elements used in RC high-rise buildings
Structural Test for High-Rise R/C BuildingsStructural Test for High-Rise R/C Buildings

27
Test Results for 150MPa SFRC columnsTest Results for 150MPa SFRC columns
(with SF1％)
Lateral Drift Angle = (1/200) (1/100) (1/50) (End of test)
(without SF)
(without SF)
(with SF1%)
Lateral Drift Angle : R×10-3[rad.]
Lateral Drift Angle : R×10-3[rad.]
ShearForce:Q[kN]ShearForce:Q[kN]

28
Subassemblies Test
using 150 Mpa SFRC
Subassemblies Test
using 150 Mpa SFRC

29
Axial force
Nc=0.2f’C BD
４７５１６６２．５
１９００１９００
Ｎ
４００４００９２２．５４００９２２．５４００
ジャッキ
４７５×４７５
ＲＣ柱
３４００
６００８００４８０１１２０４００
７５５
４２００
Ａ
鉄骨架台
ＣＬ
４００４００３４００
１９００１９００
Ａ
正面
ＲＣ梁
３７５×４５０
５７５４５０
１６００
５７５
１６６２．５
ＢＤＢ＝０．２（）σ
ＶＣ
ＶＣ
ＰＢ
ＰＢ
２０００ｔヘッド試験機
５０／１００ｔ
ストローク５００
（Ｒ－１５０）
ピン
ピン
ロードセル
５０／１００ｔ
感度
ロードセル（ＴＣＬＰ－１０００／２０００ＢＴＳ）
感度２．０×１０－６
（ＴＣＬＰ－
－５０／１００Ｂ
［１／ｔ］
（ラム中立時
２０×１０－６
［１
Reversed cyclic loads were applied
at the both tips of the beam while
axial load was kept constant.
Beam-Column Joint TestBeam-Column Joint Test

30
-800
-600
-400
-200
0
200
400
600
800
-40 -30 -20 -10 0 10 20 30 40
J150-0
最大値
梁曲げひび割れ
接合部せん断ひび割れ
梁主筋降伏
柱曲げひび割れ
層せん断力[kN]
層間変形角 [1/1000rad.]
at maximun
strength
Final
appearance
Test Results for 150MPa Beam-column JointTest Results for 150MPa Beam-column Joint
-800
-600
-400
-200
0
200
400
600
800
-40 -30 -20 -10 0 10 20 30 40
J150-1.0
最大値
梁曲げひび割れ
接合部せん断ひび割れ
梁主筋降伏
柱曲げひび割れ
層せん断力[kN]
層間変形角 [1/1000rad.]
at maximun
strength
Final
appearance
fc’:150MPa
without SF
fc’:150MPa
with 1% SF
StoryShearForce:Q[kN]
Story Drift Angle : R×10-3[rad.]

31
◆Practical Application of 150MPa
SFRC to Precast Slender Columns
◆Practical Application of 150MPa
SFRC to Precast Slender Columns
3.2 Slender Columns3.2 Slender Columns

32
Base Isolated HospitalBase Isolated Hospital
■Outline
/ Use: Hospital
/ Location: Kanagawa
/ Maximum Height: 74 m
/ Structure: Reinforced Concrete
: Fc150 Mpa

33
/ Specified Concrete Strength
f’c= 150 Mpa
/ Measured Concrete Strength
(28 days)
fc28= 170 MPa
■ Outline of Columns
/ Precast Concrete Columns
→ 440 Pieces were used.
/ Diameter of 350 mm
/ Length of 4200 mm
Outline of 150 MPa PCa ColumnsOutline of 150 MPa PCa Columns

34
Erection of 150 MPa PCa ColumnsErection of 150 MPa PCa Columns

35
Overview of construction siteOverview of construction site
★440Pieces
were used

36
PCa Slender Column Test
using 150 Mpa SFRC
PCa Slender Column Test
using 150 Mpa SFRC

37
400ton
Structural Test for Slender PCa columnsStructural Test for Slender PCa columns

38
-300
-200
-100
0
100
200
300
-20 -15 -10 -5 0 5 10 15 20
せん断力：Q[kN]
部材角：R[×10-3rad.]
曲げひび割れ発生
コンクリート圧縮縦ひび割れ
主筋圧縮降伏
ACI318式
Unit901
（設計標準）
Design Criteria R= 0.5 %.
Design Criteria ×４ R=2.0 %.
Drift Angle(R)=0.5%
★No creck was
observed
Drift Angle(R)=2.0%
⇒Sufficient
structural
performance
★Axial force of
4000 kN was
sustained
Verification of structural
performance
Structural Test for Slender PCa columnsStructural Test for Slender PCa columns

39
Practical Application of 200MPa SFRCPractical Application of 200MPa SFRC
(Football Stadium)(Football Stadium)

40
(Football Stadium)(Football Stadium)
200 MPa PCa
Concrete Columns
Practical Application of 200MPa SFRCPractical Application of 200MPa SFRC

41
◆ Practical Application of SFRC
to B/C Joint of Precast Systems
◆ Practical Application of SFRC
to B/C Joint of Precast Systems
3.3 B/C Joint in Precast System3.3 B/C Joint in Precast System

42
Steel fibre concrete
Beam longi. bars
with headed bars
No shear Reinf.
in joint
(Newly Developed interior B/C joint )(Ordinary Interior B/C joint)
・Plain concrete
・Shear reinf. in joint
Application of SFRC to B/C JointApplication of SFRC to B/C Joint

43

44
▽FL
1) Setting of PCa Columns
2) Setting of PCa Beams
with Headed Bars

45
▽FL
3) Casting Concrete
with Fibers in B/C Joint
4) Setting of Upper
Floor PCa Columns

46
Beam/Column Joint Test
using 60 Mpa SFRC
Beam/Column Joint Test
using 60 Mpa SFRC

47
98
34
105
46
450
1512
450
119120
Headed bar
800
400
119 46
1512
225
87.5
200
450
200
Column : B×D＝400×450
Specimen NJID
Grout-filled steel sleeve joint
34
105
87.5
800
Beam : B×D＝225×450
Axialforce Nc
Axialforce ratio ηc=Nc/(BDF’c)=0.15
6060262
4504646
■Beam-column joint
Concrete f’c75.3
Steel fiber 1.0% Vol.
Test Specimen using 60 Mpa SFRCTest Specimen using 60 Mpa SFRC

48
Beam flexural yielding was confirmed using FRC in the B/C joint
Test Results of Newly Developed B/C JointTest Results of Newly Developed B/C Joint

49
Photo Animation during testPhoto Animation during test

50
0
5
10
15
20
25
30
-60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60
層間変形⾓：R×10-3[rad]
FJI0
FJI1
-400
-300
-200
-100
0
100
200
300
400
層せん断⼒：Q[kN]
梁曲げ終局強度
PJI0(通し配筋定着)
FJI1(機械式定着)
Eq.Damp.Factor:heq[%]
Comparison of Ordinary and
Newly Developed B/C Joint
Comparison of Ordinary and
Newly Developed B/C Joint
Ordinary B/C J.
New B/C J.
Flexural Strength

51
6 story Base Isolated Hospital6 story Base Isolated Hospital
■Outline
/ Use: Hospital
/ Location: Nagoya City
/ Maximum Height: 24 m
/ Structure:
RC and Steel
: Fc60 Mpa

52
Less congested than ordinary B/C joint

53
Casting condition of SFRC
▽FL

54
◆Practical Application of UFC
to Prdestrian Bridge
◆Practical Application of UFC
to Prdestrian Bridge
4.1 Bridge Precast Elements4.1 Bridge Precast Elements
4. Application of UFC4. Application of UFC

55
Composition of UFC
Stress- Strain Relationship
Ultra-High-Strength Fiber-Reinforced Concrete
UFC is an epoch-making high-ductility/high-durability concrete
having a compressive strength exceeding 150 N/mm2 as well as a
high tensile strength exceeding 10 N/mm2.
What is UFC ?What is UFC ?

56
◆Sakata-Mirai Bridge Using 200MPa UFC
Application of UFC to BridgeApplication of UFC to Bridge
(Reference)
Nikkei construction:
September 13, 2002

57
Ordinary Concrete
40N/mm2
Outer cable PS structure
Span：50m
Floor thickness：5cm
Web thickness：8cm
Completed in 2002
UFC 200N/mm2 Steel Girder
Main cable
25S15.28x2
Main cable
19S15.28x4
Effective
width
1.6 m
Effective
width
1.6 m
Effective
width
1.6 m
1.56
2.1
3.0
(Reference)
September 13, 2002
Comparison of Girder SectionComparison of Girder Section
◆Sakata-Mirai Bridge Using 200MPa UFC

58
◆Akakura Onsen-Yukemuri Bridge
Span : 35.3m
Depth : 950mm
Outer cable PS structure
Slab thickness : 70mm
Web thickness : 70mm
Completed in 2004
Section
(Reference)
September 13, 2002

59
◆Mikaneike Bridge Using
Length : 81.2m
Span : 39.9m
Width : 3.6m
PC outer cable structure
U shaped girder
Completed in 2007
Y. Uchida et al : Review of Japanese
Recommendations on Design and
Construction of Different Classes of Fiber
Reinforced Concrete and Application
Examples, Keynote Paper, 8HSC/HPC
Symposium, 2008.10

60
◆Riverside Senshu Renraku Bridge
Length : 30.5m
Span : 2+26+2m
Width : 4.1m
PC outer cable structure
Slab thickness : 70mm
Web thickness : 100-200mm
Completed in 2007
Symposium, 2008.10

61
PCｹｰﾌﾞﾙ
12S15.2B
ｎ=3本
800
940
130 130540
1850
2000
50
70
150
◆Tokyo Monorail◆Tokyo Monorail
Application of UFC to Monorail GirderApplication of UFC to Monorail Girder
Symposium, 2008.10

62
Application of UFC to GirdersApplication of UFC to Girders
◆Ramp way of East
Kyushu Expressway
using 200MPa UFC
Symposium, 2008.10

63
◆Haneda Airport Runway◆Haneda Airport Runway
4.2 Offshore Structures4.2 Offshore Structures

64
Application of UFC to Airport SlabsApplication of UFC to Airport Slabs
● UFC precast slabs (7,000 pieces,
standard dimension 7.8 m x3.6 m )
● World largest volume of 24000 m3
Y. Uchida et al : Review of Japanese Recommendations
on Design and Construction of Different Classes of Fiber
Reinforced Concrete and Application Examples, Keynote
Paper, 8HSC/HPC Symposium, 2008.10

65
◆Retrofit Projects◆Retrofit Projects
4.3 Precast Plates or Forms4.3 Precast Plates or Forms

66
Application of UFC to Repair ProjectApplication of UFC to Repair Project
Y. Uchida et al : Review of Japanese Recommendations
on Design and Construction of Different Classes of Fiber
Reinforced Concrete and Application Examples, Keynote
Paper, 8HSC/HPC Symposium, 2008.10

67
5.1 Precast Coupling Beams in
Buildings
5.1 Precast Coupling Beams in
Buildings
5. Application of HPFRCC5. Application of HPFRCC

68
Application of HPFRCC to BuildingApplication of HPFRCC to Building
＊Kajima Corporation
(http://www.kajima.co.jp/news/press/200509/29a1fo-j.htm)
◆27-story residential building(2006)
Core wall
HPFRCC coupling beam
Support column
Flat slab

69
HPFRCC Short Beam TestHPFRCC Short Beam Test
-160
-120
-80
-40
0
40
80
120
160
-30 -20 -10 0 10 20 30
せん断力Q(kN)
部材変形角R (×10
-3
rad.)
BB0
cQfu
-160
-120
-80
-40
0
40
80
120
160
-30 -20 -10 0 10 20 30
せん断力Q(kN)
部材変形角R (×10
-3
rad.)
BB2
cQfu
(HPFRCC Beam)(Normal Concrete Beam)
Disp. Angle R(X10-3rad.)Disp. Angle R(X10-3rad.)
ShearForceQ(kN)
ShearForceQ(kN)
＊Kajima Corporation
(http://www.kajima.co.jp/news/press/200509/29a1fo-j.htm)

70
Application of HPFRCC to BuildingApplication of HPFRCC to Building
building (2007)
building (2009)

71
5.2 Retrofit Project5.2 Retrofit Project

72
Application of HPFRCC to Public WorksApplication of HPFRCC to Public Works
Y. Uchida et al : Review of Japanese Recommendations on Design and Construction of Different Classes of
Fiber Reinforced Concrete and Application Examples, Keynote Paper, 8HSC/HPC Symposium, 2008.10

73
Y. Uchida et al : Review of Japanese Recommendations on Design and Construction of Different Classes of
Fiber Reinforced Concrete and Application Examples, Keynote Paper, 8HSC/HPC Symposium, 2008.10
Application of HPFRCC to Public WorksApplication of HPFRCC to Public Works

74
6. Concluding Remarks6. Concluding Remarks

75
■ Fiber Reinforced HSC
1) In building structures, evolution of high-rise RC buildings
has been related to the evolution of HSC.
2) Because high strength concrete is less performance in
terms of fire-resistance and has a brittle behavior, organic
and steel fibers are added in order to improve its
characteristics.
3) Some recent research advances and applications
associated with fiber reinforced HSC were presented
focusing on applications to precast concrete elements in
Japan.
Concluding Remarks (1)Concluding Remarks (1)

76
■ UFC (Ultra High-Strength Fiber Reinforced
Concrete)
1)UFC is high-ductility/high-durability concrete of a
compressive and a high tensile strengths exceeding 150
MPa and 5 MPa, respectively.
2)UFC has been applied to bridge girders where 1) small
member thickness, 2) light weight and 3) small beam section
height , are required.
3)UFC precast slabs of the world largest volume are used
for the deck slabs at the off shore airport runway. The
reasons of the application are weight reduction and the
durability against the salt attack.
4)UFC precast forms are used in the retrofit projects due to
the improvement of the durability including the wearing or
abrasion resistance.

77
■ HPFRCC (High Performance Fiber Reinforced
Cement Composite)
1) HPFRCC has been applied to many civil engineering
structures (tunnels, bridges, gravity dams, etc.) where cracks
must be kept fine or large ductility is required.
2) HPFRCC was applied to connecting beams between
shear walls in a high-rise RC building because of its
excellent energy absorbing performance and less damages.

78
Tokyo SceneTokyo Scene
Shinjuku Business
center west of Tokyo
Shinjuku Business
center west of Tokyo

79
Contents of today’s speechContents of today’s speech
1. Introduction 7min.
2. Classification of FRCC 3.7min
3. Application of Fiber Reinforced HSC
3.1 High Rise Building Columns 8min.
3.2 Slender Columns 4min.
3.3 B/C Joint in Precast Systems 4.4+α min.
4. Application of UFC
4.1 Bridge Precast Elements 4min.
4.2 Offshore Structures 1.2min.
4.3 Precast Plates or Forms 1.0min.
5. Application of HPFRCC (ECC)
5.1 Precast Coupling Beams in Buildings 1.7min.
5.2 Retrofit Projects 2.1min.
6. Concluding Remarks 2.1min.
Total 39.2min.

2015 10 06_sem_pref_kimura_precast_seminar_in_santiago_final

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