Application of Sustainable High Performance Steel in ...seaisi.org/file/S3 P4 CHP_POSCO.pdf ·...

Application of Sustainable

High Performance Steel in Structures

2017. 11. 27

POSCO

Steel Structures Research Group

2017 ASEAN Iron and Steel Sustainability Forum

2/14

POSCO

Since 1968 POSCO have been growing into a Global company

World’s No. 1, 2 production capacity single mill

Founded in 1968, growing to a global company ...

30

20

10

1980 1990 20001970 2010

’10 : 33.0 M tpy

’73 1st Phase Constr. atPohang Completed(1.03 M tpy)’68

Est.

’83 Pohang SteelworksConst. Completed(9.1 M tpy)

’92 Gwangyang Steelworks Const. Completed (20.8 M tpy)

’94 Listed on the NYSE(1st Korean Company)

’00 Privatization

‘13 : 36.4 M tpy

‘14 : 37.7 M tpy

Global Recognition as the Most Competitive Steel Company

Gwangyang Works

Pohang Works

Prod.(M tpy)

Crude Steel Production

‘15 : 37.9 M tpy

‘16 : 37.5 M tpy

Pohang Works

(16.7M tons) 2nd largest in the World

(21.2M tons) The largest in the World

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POSCO

Global network to ensure stable steel supply

Stabilized global steel supply chain

JAPAN- 6 Processing centers

ASEAN-9 Production plants-20 Processing centers

CHINA- 7 Production plants- 10 Processing centers

EUROPE- 4 Processing centers

PT.POSCO Resources Indonesia

Global production plant : 18

Global coil processing center : 46

POSCO-IAPC

As of 2014

AMERICA- 2 Production plants- 6 Processing centers

POSCO India POSCO SouthAsia

POSCO-Maharashtra

POSCO-ESI

VPS

POSCO-Vietnam

POSCO SS VINA

POSCO-VST

POSCO-Malaysia

PT.Krakatau POSCO

Myanmar-POSCO

POSCO-TSC

POSCO-Thainox

POSCO-TNPC

POSCO-IPPC

POSCO-ICPC

POSCO-IDPC

POSCO-TBPC

POSCO-VNPC

POSCO-VHPC

POSCO-MKPC

POSCO-IJPC

Local to Global

ASEAN

TSC-HoChiMinh

POSCO-KL

TSC- Jakarta

India TSC

TSC-Delhi

TSC-Chennai

Global production plant : 19

Global processing center : 32

Global TSC (Technical Service Center) : 22

POSCO’s Global network consists of 182 companies in over 50 countries

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POSCO

POSLAB

Gwangyang Research Lab.(3 Research Gr.)

Steel Business Div.

Product Application Center(4 Research Gr.)

POSLAB

Pohang Research Lab.(5 Research Gr.)

POSCO Center Personnel : 990 Budget : 512 million USD

RIST

POSTECH(GIFT, GEM)

POSLAB : POSco technical research LABoratoriesRIST : Research Institute of industrial Science & TechnologyPOSTECH : POhang university of Science and TECHnologyGIFT : Graduate Institute of Ferrous TechnologyGEM : Graduate school of Engineering Master

R&D in steel and application

Developing innovative steel and application technology

Global R&D Center - Steel Solution Marketing

- Application Technology

POSLAB (Gwangyang) - Steel technology

POSLAB (Pohang) - Steel technology

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POSCO in Construction

POSCO provides various innovative steel solutions in construction industry

High-rise

Buildings

Cable Bridges

Space structure

Steel Bridges

Modular housing

Road Facilities

Airport/Stadium

Poles/ Guard rail /

Noise barrier

Const. products

Pile foundation

Support/Scaffolding

Pipe piles/ Sheet piles

Structure/curtain wall etc.

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POSCO in Construction

POSCO provide engineering & construction steel solutions

High performance steel Material Engineering

Steel Solutions Performance Verification

Full Scale Bending Test Nonlinear Analysis of Test

Develop application technology

- Welding/bolting, code/spec. etc.

WP

steel

Application

Tech.

Code,

Spec.

Optimize design using HSA/HSB

- Design optimization

- Hybrid design

- Connection details

- Standard designs

- BIM lib. / Database

Develop steel products & systems

- Downstream biz., cooperation w/

clients (Patents)

- Composite col./ beam / girders

Structural performance evaluation

- Structural analysis

- Structural test(fatigue/full scale)

U section

H section

Hybrid design

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Providing Values using Steel Structure

Reduce weight Increase Space

Improve Fabrication Increase Constructability

Apply high strength steel

- YS: 380/460/690MPa HSB*

within serviceability limit

Reduce lifting weight

Longer span (w/ low girder height)

Lower floor height (more stories)

Use high performance steel

- TMCP* steel - good weldability

: Low Ceq, low preheat temp.

Optimize for fabrication

- Min. size variations

- Min. small pieces

- Optimize procurement

Stable during erection

System erection : Prefabricated

Easy site connection

U section

H section

* Thermo Mechanical control process

* High performance

Steel for Bridges

BESTI beam

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Providing Values using Steel Structure

Sustainability Accelerated Construction

No long-term deterioration

- Fatigue considered during design

Min. maintenance during lifespan

- Weathering steel

: No paint (re-paint) needed

- Integral substructure (jointless)

100% recyclable material

- LCA analysis

Fast construction

- Min. total construction time

: Replacement of deteriorated bridges

New erection methods

Modular system (standardized)

Min. traffic control

- Min. on-site construction

- Min. lane closure

: Erection of overpass

Prefabricated systems

Rural area

- Fast/Easy delivery : Mobility

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High performance Weathering Steel (HSB-W)

Introduction

High Performance Weathering Steel for Bridges (HSB-W)

- Low alloy steel(Cu, Cr, Ni) at atmospheric environment fine adherent protective rust

forms on steel surface that inhibits further corrosion

- High performance as HSB (low temp. toughness, weldability etc.)

Crack

Fe3O4 녹층

Steel

Protecctive rust layer

Cr α-FeOOH Fe3O4

Steel Corrosion developing

YR

4M

RB

3yr

Dark Brown

7yr

HSB380W HSB460W HSB690W

Max. thickness 100mm 100mm 80mm

YS 500MPa 600MPa 800MPa

TS 380MPa 460MPa 690MPa

Toughness -5℃ 47J -20℃ 47J

Ceq 0.47 0.47 0.60

Pcm 0.22 0.22 0.27

Other spec. HPS345W, A709-50W, A588-Gr.B, S355J2W

Weathering steel Conventional steel

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High performance Weathering Steel (HSB-W)

Performance verification

Structural test

- Ultimate behavior and fatigue performance

Corrosion test (Cyclic Corrosion Test)

- 1% salt water CCT

SM520B

HSB600W

HSB500용착부

HSB500W

SMA490W

Test periods (cycle)

0 20 40 60 80 100 120 140 160

Wei

gh

t lo

ss (

g/c

m2 )

0.00

0.01

0.02

0.03

0.04

0.05

0.06

HSB500(weld)

SMA490W

HSB500W

SM520B

HSB600W

SM520B HSB500W

: 56% vs SM520

EPMA analysis

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High performance Weathering Steel (HSB-W)

Performance verification

Corrosion field test

- 8yrs database

Corrosion field test

- Box girder test

- Plan to compare with site monitoring data

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Accelerated Bridge Construction(ABC)

Accelerated Construction

Min. total construction time

- Replacement of deteriorated bridge

SPMT Sliding

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Accelerated Bridge Construction(ABC)

Accelerated Construction

Min. on-site construction

- Min. traffic control (lane closure/traffic delay)

Mobility for rural area

- Prefabricated & easy delivery

Crane erection: 10min full closure / girder ILM

Bent girder modules were shipped to Indonesia

Girders+Precast deck shipped on barges

(Vietnam)

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Conclusion

THANK YOU chanhee.park@posco.com