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Spectacle

Structures with Mega-composite columns
by

Hossam Abdel-Monem

on 17 May 2016

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Transcript of Spectacle

Structures with mega-composite columns
Jin Mao
8 built-up steel mega-columns carry gravity
loads

and composite wide-flanged beams.
Composite mega-columns vary in cross-section
from
1500mmX5000mm
to
1000mmX3500mm.
a central R.C. core linked to
exterior composite mega-columns by
steel outigger trusses .

Lotte world tower

Seoul, South Korea.

497.6 m
2357.2 m²
stories
123
Underground
6
Under construction
8 mega composite columns vary in cross-section
from

3500mmX3500mm
to

2000mmX2000mm
Taipei 101 Tower
Taipei, Taiwan
508 m
3891.5 m²

Stories

101
Underground

5
8 mega composite columns vary in cross-section
from
3000mmX2400mm
to
2200mmX1800mm .
Spacing between Mega-columns is 11500mm
at corners

and 22500 mm
inside .
TWO International finance centre
Hong Kong,China

412 m
1980 m²
Stories
88
Underground
6

Spacing between Mega-columns is 12000mm
at corners
and 24000 mm
inside .
8 mega composite columns
vary in cross-section
Goldin Finance 117
Tianjin, China
597 m
3057.9 m²

Stories

117
Underground

4
117
4
Vertical loads are carried by 8 mega composite columns vary in cross-section .
Spacing between Mega-columns is 6000mm

at corners

and 24000 mm

inside.
Changsha IFS Tower T1
Hunan, China
452.1 m
3030.3 m²
Stories
94
Underground
5
Floor plan
china zun tower
Beijing,China
528 m
3713 m²
Stories
108
Underground
7
Under construction
Floor plan
Shanghai World Financial Center
Shanghai, China
492 m
3669.3 m²
Stories
101
Underground
3
Mega-column sec.
8 Mega-composite columns carry compressive and bending loads .
597 m
3057.9 m²
Tianjin, China
Ping An Finance Centre
Shenzhen,China
561.7 m
3861.5 m²
Stories
115
Underground

4
Floor plan
32400 mm is the spacing between
internal mega-columns .
International Commerce Centre
Kowloon, Hong Kong
490 m
3000m²
Stories
108
Underground
4

8 mega columns which span about 16m .
Floor plan
Size of building usually
very large
RC core as the inner
tube provide rigidity
external frame with perimeter
steel columns/edge beams
floor in composite deck
with RC topping .
Composite buildings
Very few columns,
Belt truss

and outrigger systems
-Usually in the form of RC topping composite to steel
beams by shear studs .
-Floor plate is connected to the core wall by starter
bars embedded in the core wall .
Floor plate
Placing the steel deck
onto the steel beams
Connecting
using starter bars
Reinforcing steel
S420


Fy = 420 N /mm²
Es = 210 KN/mm²

structural steel
Fy =355 N/mm²
Ea = 210 KN/mm²
Design load
P
181,374 KN
Mx
211,809 KN.m
My

160,437.6 KN.m
Aa
288,000 mm²
As
348,000 mm²
Ac

8,364,000 mm²
Shanghai Tower
Shanghai,China
2nd tallest in the world

632 m
2878.8 m²


128 Stories
5 Underground
The building has been divided into 9 separate zones
along its height.
The structural system of the shanghai tower
comprises
a core wall inner tube

,an outer
mega-frame

and six levels of outrigers(at zones 2,4,5,6,7and8) between e tube and the frame.
Mega-Columns
Box belt
trusses
Radial truss
Core Wall
Inner Tube System
Outer Mega-Frame
System
50 m span
reduced to 25 m
steel contribution ratio
concrete cover:
effective flexural stiffness:
check of column axial resistance :
non dimensional slenderness :
Second-order effect:
resistance of x-sec in compresion
of biaxial bending :
plastic bending resistance :
core
W2
W1
Structural steel external frame
-Composing of steel columns that tied onto the core
wall by steel beams .
-Steel columns can be
H-section,
square,
rectangular

or circular section .
-They are in the form of composite with reinforcing steel bars encased with load-taking reinforced concrete .
Case Study
Shanghai, China.
421 m
Stories
88
3146.7 m²
spire
4

basement
3
stories

70

Floor area

1650 m²
(33*50) m²

Floor height
3 m

Fcu=700 Kg/cm²

Fy=3600 Kg/cm²

Loads
L.L=300 Kg/cm²
Cover= 150 Kg/cm²
Wall=300 Kg/cm²
Using Time History
Lucerne earthquake
Shear walls

t=1 m

L=(5-6) m
Core
t=0.8 m
side sway
.07 m .13 m
Design of Mega-composite columns


Design according to EC4


(Simplified method)
mm
OK
Mega-composite column cross sec.
Interaction diagrams
Interaction diagrams
Interaction diagrams

Inner direct integration


scale
0.2g


steps
602


time step
0.08

using Mega-Composite
Columns

with spacing varies from 11m to 17 m .
Let's take a flight
:plastic resistance to compression of the
composite cross-section.
:Elastic critical load
:max. pure normal force
X
:reduction factor
:design bending
resistance
:moment resistance ratio
,
Comparison
Comparison
Mega-composite columns is agood technique:
1-used for high rise buildings.
3-Decreasing structural system area.
2-Good resistance for wind and earthauakes.
End of show
Dr/Suzan Ali.
-Fady El-Shazly. -Hossam Atif.
-Mohamed Goda. -Karim Ibrahim.
-Ragab El-hady. -Hossam Abdel Monem.
-Hossam Saeed. -El-sayed saeed.
-Abdallah Mohamed.
12-5-2016
Full transcript