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STEEL STRUCTURES FOR BUILDING IN CHINA

PROF. HE MINGXUAN

VICE-PRESIDENT OF CHINA STEEL CONSTRUCTION SOCIETY

CHIEF ENGINEER OF BAOSTEEL CONSTRUCTION CO., LTD

JULY 6, 2012

LONDON

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1. STEEL AND STEEL STRUCTURES IN CHINA

2. SOME PROJECTS OF STEEL STRUCTURES FOR HIGH-RISE BUILDINGS IN CHINA

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STEEL AND STEEL STRUCTURES

IN CHINA

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The products of raw steel are about 565 million tons

in 2009, 626 million tons in 2010 and 683 million tons in

2011, the highest in the history.

There are more than 5,000 steel construction

companies in China now.

The products of steel structures are about 20 million

tons in 2008 , 23 million tons in 2009 , 26 million tons in

2010 and 30 million tons in 2011.

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The products of steel structuresbased on the data from 200 big

qualified steel constructioncompanies are about 12 million tonsin 2009 , 13 million tons in 2010 and

15 million tons in 2011.

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Shapes

Cold Forming Steel

Pipes

Others

Plates

STEEL MATERIALS IN 2009

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STEEL MATERIALS IN 2010

Shapes

Cold Forming Steel

Pipes

Others

Plates

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STEEL GRADE IN 2009

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STEEL GRADE IN 2010

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STRUCTURES IN 2009

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STRUCTURESIN 2010

Buildings

Bridges

Tower Mast

Others

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BUILDING STRUCTURES IN 2009

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BUILDING STRUCTURES IN 2010

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HIGH STRENGTH LOW ALLOY

STRUCTURAL STEELS

GB/T 1951-2008

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CHEMICAL COMPOSITIONS

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CHEMICAL COMPOSITIONS

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STRENGTHS

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STRENGTHS

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NATIONAL STADIUM BEIJING,CHINA

Steel:500 tons

GradeQ460E/Z35

t=100~110mm

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Steel : 2,363 TONS

Grade : Q460

CCTV NEW TOWER BEIJING, CHINA

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Basic characteristics of HPS

Gradefy(MPa)

fu

(MPa)

d(%)!

fy / fu"

P%

S%

Nominal thickness (mm)

!16 >16~35 >35~50 >50-100

Q460GJ "460 460~600

450~590 440~580 550~72017 0.85

!0.020 !0.015

Q460 "460 "440 "420 "400 550~72016

!0.025 !0.020

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Benefits of high strength steels

Reduced materials, labor, and fabrication efforts.

Reduced energy in fabrication and delivery.

Increased usable floor areas in buildings.

Significant reduction in total cost.

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SOME PROJECTS OF STEEL

STRUCTURES FOR HIGH-RISE

BUILDINGS IN CHINA

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Steel buildings are oftenadopted in areas with weak

foundation and high earthquake intensity in order

to reduce the self-weight of the buildings.

For high-rise buildings over 300 m high, steel-

concrete composite buildings are often adopted.

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CCTV NEW TOWER

BEIJING,CHINA

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CCTV NEW TOWER

234m High53 Story

470,000 m2

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Steel Materials:

Q345GJC Tmax=135mmQ390D Tmax=100mmQ420D Tmax=100mmQ460E Tmax=100mm

Total tonnage:124,000tons,whereQ420:3,326tons and Q460:2,363tons

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Frame structures

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Sections of columns

Frame structures

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Connections for trusses at 37th-story

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Connections for trusses at 37th-story

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Transfer truss at tower 2

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Pre-assembling of transfer truss

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SHANGHAI WORLD FINANCIAL

CENTER

492 m High

101 Story

381,600 m2

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Steel 60,000 tons

Grade A572 Gr50

S460

SN490

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Belt

truss

Mega brace

Mega

column

Concrete

core wall

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Outrigger

truss

Mega

column

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Lower core

wall

Middle core

wall

Upper core

wall

FL-55 to FL-59

FL-76 to FL-79

Mega Truss

around Belt

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Mega

brace

column

Outriggertruss

around

core wall

e t

truss

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OUTRIGGER TRUSS

Outrigger

at FL-19

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Shanghai Tower

632m high

574,000m2

120 story

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Steel 100,000 tons

Grade Q345-Q460

Tmax=130mm

L t

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Layout

Plane

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Mega columns

Columns in core walls

SECTION OF EIGHT MEGA COLUMNS

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4.1mX3.0 m t=100mm

SECTION OF FOUR MEGA COLUMNS

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4.25mX1.4m t=50mm

SECTION OF FOUR MEGA COLUMNS

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Floor beams at FL-8

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Outrigger trusses

Floor trussesBelt trusses

FL-22

Floor beams

Roof steel structure

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Roof steel structure

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Thank You