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Capital Gate
1. Special topic in structural Engineering
Capital Gate Abu
Dhabi
Bara AlRefai
United Arab Emirates University
2. Capital Gate
❖ 160 m tall
❖ 35 stories
❖ Inclined 18 degree to west.
❖ Capital gate title four times
more than the Tower of Pisa.
❖ It got Guinness certificate for
furthest leaning man mad
tower.
4. Capital Gate
❖ Cost $233 million.
❖ 600 people labor force
participate in construction.
❖ Two year of constriction.
❖ Completed in 2011.
❖ Total Area :53,100 square
meter.
❖ Mainly used for hotel and
offices.
5. Structural system
❖ Concrete core surrounded by
two steel truss (diagrid
system).
❖ External and internal diagrid
system (lateral load resisting
system).
❖ Steel beam support concrete
floor & run between two diagrid
system.
6. Structural system
❖ Outriggers are horizontal trusses
connect building core distant
structural element.
❖ Used to increase strength and
overturning stiffness.
❖ The dense outriggers system
started to be used from17th
mechanical floor.
❖ Mainly used to resist wind load.
7. Foundation
❖ Rectangular raft footing.
❖ 2 m depth and 7000 cubic
meter reinforced concrete.
❖ 490 piles.
❖ Each has 1 m diameter.
❖ Half under compression with
depth of 20 m.
❖ Other half under testation with
depth of 30 m.
9. Irregularity that Should be taken in
consideration
❖ The flowing Vertical
Irregularities that may exist in
Capital Gate Abu Dhabi :
1. Stiffness irregularity.
2. Mass irregularity.
❖ The flowing plan Irregularities
that may exist in Capital Gate
Abu Dhabi :
1. Torsional irregularity.
2. Diaphragm Discontinuity.
3. Out-of-plane Offsets of vertical
Element.
