A vasbetonszerkezet tervezésénekkemmk.hu/sites/default/files/dokumentumok/balazs_l... · BME Építőanyagokés Magasépítéstanszék BME (1782) Budapest University of Technology

FÉDÉRATION INTERNATIONALE DU BÉTON – INTERNATIONAL FEDERATION FOR STRUCTURAL CONCRETE

MMK Szakmai továbbképzés

Tatabánya, 2019. 03. 28.

A vasbetonszerkezet tervezésének

jelene és jövője

“Mivel bővülnek az anyagtulajdonságok:

beton, szálerősítésű beton, acél, FRP”

György L. Balázs

Honorary President of fib

BME Építőanyagok és Magasépítés tanszék

BME (1782)

Budapest University of

Technology and Economics

Balázs L.Gy.: Anyagtulajdonságok bővülése: beton, FRC, acél, FRP, MMK, 2019. márc. 28. 1/73

FÉDÉRATION INTERNATIONALE DU BÉTON – INTERNATIONAL FEDERATION FOR STRUCTURAL CONCRETEFÉDÉRATION INTERNATIONALE DU BÉTON – INTERNATIONAL FEDERATION FOR STRUCTURAL CONCRETE

MMK Szakmai továbbképzés, Kecskemét, 2019. 03. 28.


fib MODEL CODE 2010

www.ernst-und-sohn.de.mc2010


1970 1980 1990 2000 2010 2020

1978

CEB-FIP

Model Code 78

ENV 1992-1-1

CEB-FIP

Model Code 90

EN 1992-1-1

fib

Model Code 2010

Revised

EN 1992-1-1

MC78 and MC90 were used in Brazil partly as national codes

Collaboration with Asian Model code

Collaboration with African Model code

Model Codes are used as reference documents

both in research and in design

STRONG INFLUENCE OF fib (CEB-FIP) MODEL CODES

ON CODE DEVELOPEMENTS

EC2 és a Model Codok összefüggése

Balázs L.Gy.: Anyagtulajdonságok bővülése: beton, FRC, acél, FRP, MMK


MODEL CODE

1978MODEL CODE

1990

BULLETIN 34Service Life

Design

MODEL CODE

2010

MODEL CODE-ok fejlődése

CEB 165

Seismic Design



PREPARATIONS OF MC2010

BEFORE VOTINGTechnical Council Meeting, 28 Oct 2011, Lausanne


VOTING ON MODEL CODE 201029 Oct 2011, Lausanne



CEB + FIP = fibEuro-International

Committee for Concrete

Comité euro-

internationale du béton

1953

CEB

International Federation

for Pre-stressing

Fédération internationale

de la précontrainte

1952

fib


60 years fib – CEB – FIP

PRESIDENTS

1953-57 André Balency-Béarn (F)

1957-68 Franco Levi (I)

1968-71 Hubert Rüsch (D)

1971-78 Andrew Short (UK)

1979-83 Julio Ferry-Borges (P)

1983-87 Theodossios Tassios (GR)

1987-98 Roy Rowe (UK)

1953-58 Eugéne Freyssinet (F)

1958-61 Eduardo Torroja (E)

1961-66 Yves Guyon (F)

1966-70 Franco Levi (I)

1970-74 Gerrit F. Janssonius (NL)

1974-78 Ben C. Gerwick Jr. (USA)

1978-82 Roger Lacroix (F)

1982-84 John Derrington (UK)

1984-88 Hans Wittfoht (D)

1988-92 René Walther (CH)

1992-96 Jan Moksnes (N)

1996-98 Michel Virlogeux (F)

1998-2000 Michel Virlogeux (F)

2000-2002 Joost Walraven (NL)

2002-2004 Jim Forbes (AUS)

2005-2007 Giuseppe Mancini (I)

2007-2008 Hans-Rudolf Ganz (CH)

2009-2010 Michael Fardis (GR)

2011-2012 György L. Balázs (H)

2013-2014 Gordon Clark (UK)

2015-2016 Harald S. Müller (D)

2017-2018 Hugo Corres Peiretti (E)

2019-2020 Tor-Ole Olsen (N)



Structure, organization and current activities

65 years fib – CEB – FIP PRESIDENTS



A fib felépítése

General Assembly

Technical Council

CommissionsTask Groups

Working Parties

Presidium Secretariat

Materials & production

COM3Existing

Concrete

Structures

COM2Analysis &

design

COM1Concrete

structures

Planning & execution

COM6Prefabrication

COM5Reinforcement

COM4Concrete &

concrete

technology

COM8Durability

COM7Sustainability

COM9Dissemination

of knowledge

Sustainability & durability Education & publications



fib bulletins

• Technical reports

• State-of-the-art

reports

• Textbooks

• Manuals or guides

• Recommendations

• Model Codes



Structural Concrete

Journal of fib

Impact factor 2018:

1.384


fib Textbook: STRUCTURAL CONCRETE

Behaviour, design and performance



fib Szimpóziumok és Kongresszusok

2016 PhD Symposium

21-23 Nov. – Cape Town, South Africa

2017 Symposium

12-16 June - Maastricht, Netherlands

2018 Congress

6-12 October - Melbourne, Australia

2019 Symposium

27-29 May - Krakow, Poland

2016 Symposium

29-31 August – Tokyo


fib tagországok 2017

Magyar-

ország

2

szavazat



fib Magyar Tagozat tagjai



fib folyamatosan bővül

új tag: fib-UAE2017. ápr. 10.

Society of Engineers, Dubai


MODEL CODE 2010

Most comprehensive code for concrete

structures.

Includes whole life cycle of concrete structures:

DESIGNCON-

STRUC

-TION

CON-

SERVA-

TION

DIS-

MANTL-

ING



MODEL CODE 2010

Safety Servicability Durability Sustainability

Performance based requirements

New

types

of

concretes

New types

of

reinforce-

ments

Composite

structures



1. Resistant

2. Serviceable

3. Durable

4. Constructable

5. Aesthetic

6. Economic

CONCRETE MUST BE:



7. Robust enough to avoid

progressive collaps

8. Require minimal maintenance

9. Able to embed waste materials

10. Provide barriers against hazards

11. Provide protection against accidents

12. Reusable

13. Recycable

14. Fire and earthquake resistant

15. Environmentally compatible and

support sustainability

and also:



CONTENT – fib MODEL CODE 2010

3. BASIC PRINCIPLES

1-2. NOTATIONS, SCOPE, TERMINOLOGY

4. PRINCIPLES OF STRUCTURAL DESIGN

5. MATERIALS

6. INTERFACE CHARACTERISTICS

7. DESIGN

8. CONSTRUCTION

9. CONSERVATION

10. DISMANTLEMENT



fib MODEL CODE 2010

NOTATIONS

Notations are in accordance with

ISO and EUROCODE notations e.g.:

f strengthϬ stressε strainρ steel ratio

..... SI units



fib MODEL CODE 2010

1. SCOPE• Intends to serve as basis for future

codes for concrete structures

• Takes into account new developments

(in areas that are concluded)

• Rules should be transparent enough

• Gives commentary (left hand side)



fib MODEL CODE 2010

2. TERMINOLOGYBirth certificate Condition after construction

Performance Behaviour of a structure as a

consequence of actions to which it

is subjected or which it generates

Service life Period during which the required

performance must be achieved

SLS, ULS

Robustness Ability of a structure to sustain

local damage without dispropor-

tional distress or collapse



fib MODEL CODE 2010

3. BASIC PRINCIPLESLevels of approximation

Level I most simple approach valid for

standard cases

Level II, III refined approaches for higher

accuracy and more economic

solutions

Requirements for SLS and ULS

Life cycle management, Quality management

Requirements for Robustness and

Sustainability



fib MODEL CODE 2010

4. PRINCIPLES OF

STRUCTURAL DESIGN

• Design methods

• Safety formats

SLS, ULS, Fatigue, Durablity



fib MODEL CODE 2010

5. MATERIALS CONCRETECONCRETE TODAY IS DIFFERENT FROM CONCRETE YESTERDAY

(Photo: Salem G. Nehme)



MC 1990 MC 2010Criterion

concrete strength

concrete type

20 … 60 (90) MPa

normal strength

20 … 130 MPa

normal strength

high strength

lightweight (10 … 90 MPa)

self-compacting

greendifferent ranges of applicability, depending on the related load

(static, impact etc.); temperature range: mainly 0 °C < T < 80 °C concrete loads

tailor made concretereference to test standards or

recommendations

Reflections of current innovations in fib MC2010

(H. S. Müller)

fib MODEL CODE 2010

5. MATERIALS CONCRETE


fib MC 2010: New Shrinkage Model

MC 2010: mechanism based summation approachMC 1990: conventional

drying shrinkage

( ) ( ) ( )ssRHcmsscs ttftt −= , ( ) ( ) ( ) ( ) ( ) ( )sdsRHcmcdsascmcasscs tttftftt −+= 00,

autogenous shrinkagetotal shrinkagecs cas cds

age of concrete tts

RH = 65%

sealed

duration of drying t-ts

shrinkage

cs

RH = 65%

sealed

HSC

NSC

autogenous shrinkage εcas

drying shrinkage εcds

HSC

approach:

cscas 05.0

cdscascs +=

NSC

negligible

cscas 05.0

MC 2010: mechanism based summation approach

(H. S. Müller)



MC 1990: product type approach (uniform deformation kinetics)

fib MC2010: New Creep Model

MC 2010: product type approach with distinct separation of components

basic creep drying creep

( ) ( ) ( ) ( ) ( )000 ,, tttfRHtt cm =

( ) ( ) ( ) ( ) ( ) ( ) ( )0000 ,,, tttRHfttftt dcdccmdcbccmbc +=

Basic creep Drying creep

( ) ( )

+−

+= 1035.0

30ln, 0

2

,0

0 ttt

ttadj

bc

( ) =→

0,lim ttbct

( )( )( )

adjt

H

dctt

tttt ,0

5.33.2

1

0

00,

+

−+

−=

( ) 1,lim 0 =→

ttdct

(H. S. Müller)



(Photo: Zsuzsanna Józsa, Rita Nemes)

LIGHWEIGHT AGGREGATES



fib MODEL CODE 2010

5. MATERIALS FRCTest set-up for three-point flexural test of notched

FRC beam specimen (Fig. 5.6-5 of MC2010)



STEEL FIBRES

POLYMERIC FIBRES

GLASS FIBRES BME (1872)

G. L. Balázs

Balázs L.Gy.: Anyagtulajdonságok bővülése: beton, FRC, acél, FRP, MMK, 2017. ápr. 28. 35/73


fib MODEL CODE 2010

5. MATERIALS FRC

P

P P

PPcr crP

crack formation

crack

crack formation

localization

Softening or hardening behaviours of FRC

in axial tension (Figure 5.6-2 of MC2010)



fib MODEL CODE 2010

5. MATERIALS STEEL and FRPStress-strain diagrams for reinforcing steel for prestressing steel

and for FRP in MC2010 (Figures of MC2010 from Ch. 5.2)

Balázs L.Gy.: Anyagtulajdonságok bővülése: beton, FRC, acél, FRP, MMK, 2017. ápr. 28. 37/73


fib MODEL CODE 2010

5. MATERIALS FRP reinforcementsWIRES

Steel Aramid C a r b o n

STRANDS

Non-metallic reinforcements


Döllnitz Creek bridge - Oschatz, Germany (2005)




Lajos Bán


FÉDÉRATION INTERNATIONALE DU BÉTON – INTERNATIONAL FEDERATION FOR STRUCTURAL CONCRETEPhoto: Lajos Bán

FÉDÉRATION INTERNATIONALE DU BÉTON – INTERNATIONAL FEDERATION FOR STRUCTURAL CONCRETEPhoto: Lajos Bán



Beams prestressed either with steel or with CFRP wiresBME (1782)

G. L. Balázs



fib MODEL CODE 2010


Bond of reinforcement

Connections: Concrete to concrete

Concrete to steel

FRP pre-

stressing wire

Steel pre-

stressing wire



fib MODEL CODE 2010


Bond of reinforcementBond-slip

of steel and FRP

reinforcements (Figure 6.1-8 and

Figure 6.2-1 of

MC2010)



fib MODEL CODE 2010

7… DESIGNConceptial design

ULS:

Flexure, Shear, Torsion, Punching,

Compressed members, Strut-and-

tie models, Fatigue,

Fire, Explosion, Earthquake



Shear „Modified compression field theory”

fib MODEL CODE 2010

7… DESIGN ULS



fib MODEL CODE 2010

7… DESIGN SLS Cracking and deflections

Tensile force-strain diagramCrack control



fib MODEL CODE 2010

7… DESIGN Fastening technique - Anchors

Most relevant failure modes


Oct. 2001

Gotthard tunnel

FIRE DAMAGES serious

deterioration

Prestressed roof girder

Budapest, 1985

BME (1782)

G. L. Balázs


fib MODEL CODE 2010

7… DESIGN FIREConcrete at 1000 °C!



σ-ε in

FIRE

(Schneider,

Lebeda, 2000)

(Reinhardt, 1973)



Every constituent is subjected to high temperatures

7… DESIGN



fib MODEL CODE 2010

7… DESIGN EARTHQAUKE



EARTHQUAKE – KOBE, Japan

Relative displacements

56/73


SUSTAINABILITY

Malediven

CO2 ?

fib MODEL CODE 2010

7... DESIGN We have to save them



FENNTARTHATÓ FEJLŐDÉSSUSTAINABLE DEVELOPMENT

fib 47 p. 3

Teljesíti a jelen kor

szükségleteit, a jövő

generáció lehetőségeinek

korlátozása nélkül.



fib MODEL CODE 2010

8. CONSTRUCTION

Turning Torso - Malmö, Sweden



fib MODEL CODE 2010

9. CONSERVATION - Assessment



fib MODEL CODE 2010

9. CONSERVATION - Assessment

FRP strengthening techniques



Externally bonded reinforcement

EBR

1. Surface preparation

2. Reinforcement application

3. Quality control

4. Finishing

BME (1782)

G. L. Balázs



APPLICATION ON EBRBME (1782)

G. L. Balázs



Near surface mounted

reinforcement NSM

Cross section

1. Cut groove

2. Prepare groove

3. Apply adhesive

4. Place FRP rod/shape into groove

5. Finish

BME (1782)

G. L. Balázs



SHEAR STRENGTHENING WITH NSM

(Dias, Barros, 2006)



APPLICATION ON BRIDGES

(Fyfe, 2001)

EBR Strengthening(Balázs, Almakt, 2000)

NSM Strengthening

BME (1782)

G. L. Balázs



APPLICATION ON SILOS

EBR Strengthening(Balázs, Almakt, 2000)

NSM Strengthening(Emmons, Thomas,

Sabinis , 2001)

BME (1782)

G. L. Balázs



PEELING-OFF FAILURE(Hollaway, Lemming, 1999)



SHEAR AND PEELING STRESSES AT

THE END OF THE PLATE

Täljsten, 1994


fib MODEL CODE 2010

9. CONSERVATION - StrengtheningCritical failure modes



fib MODEL CODE 2010

10. DISMANTLEMENT



ÖSSZEFOGLALÁS



KÖSZÖNÖM

A

MEGTISZTELŐ

FIGYELMET!

www.ernst-und-sohn.de.mc2010

SOK SIKERT KÍVÁNOK A MC 2010

ALKALMAZÁSÁHOZ

Balázs L.Gy.: Anyagtulajdonságok bővülése: beton, FRC, acél, FRP, MMK, 2019. márc. 28. 1/73

Documents

A vasbetonszerkezet tervezésénekkemmk.hu/sites/default/files/dokumentumok/balazs_l... · BME Építőanyagokés Magasépítéstanszék BME (1782) Budapest University of Technology