stucture system ppt

1. ARCUATED
STRUCTURE
Evolution of structure
July, 2016

2.  Bara Imambada, Lucknow
 Taj Mahal ,Agra
 Sultan ahmed mosque, Istanbul
 Humayun Tomb, New Delhi
And many others
E.g. :
Ghiyathal-dintughlaqtombin delhi
A term applied to a building structurally dependent on
the use of arches or the arch principle, in contrast to a
trabeated building.
Arcuated
structure

3. Types of arches

4. Part
of
it
Part
of
it

5. An arch resting on two
large corbels with curved faces.
An arch struck
from one or more centers below the
springing point, which forms a partial
curve or eyebrow. This arch is so named
because it formed from a segment of a
circle. It is an extremely common form of
arch both in stone and in brick.
An arch resting on
imposts treated as downward
continuations of the archivolt A Roman arch is a
strong rounded arch with a semicircular
intrados. There are several examples of
Roman arches in ancient Roman
structures.
Round
arches are generally single centred
or four centred arches. Following are
the various types of round arches:

6. Gothic Arch: A pointed arch especially
having two centers and equal radii.
An arch
having an intrados that extends
above the springing before
narrowing to a rounded crown. Also
known as Moorish arch.
A three centred arch having a
crown with a radius much greater than that of the
outer pair of curves. Also called anse de panier.
An arch having its
extrados struck from a centre further up the central
vertical axis than that of the intrados.

7. A pointed
arch having two centers and radii less
than the span.
A pointed arch
having two centers and radii greater
than the span.
A pointed arch, each haunch
of which is double curve with the concave
side uppermost.

8. Types of Arcuated
System
• CORBELLED :A corbel arch (or corbeled / corbelled arch) is an
arch-like construction method that uses the architectural technique of
corbeling to span a space or void in a structure, such as an
entranceway in a wall or as the span of a bridge.
• RADIATING:An arch in which each voussoir
is carved with motifs placed along the radius
of the arch. (as opposed to a tangential arch).
• VAULT:A roof in the form of an arch or a series of arches, typical of
churches and other large, formal buildings.

9. • DOME: A rounded vault forming the
roof of a building or structure, typically
with a circular base:
• SQUINCH:A straight or arched structure across an interior angle of a
square tower to carry a superstructure such as a dome.
• PENDENTIVES: A curved triangle of
vaulting formed by the intersection of a
dome with its supporting arches.

10. radiating
archLoad transfer in various
types of Arches• Forces acting in arches and vaults are
characterised by a thrust.
Intensity of horizontal thrust is generated
by the weight of the voussoir

Action of different voussiors on below ones
create line of thrust
 Line of thrust determine the stability of arch
amd vault.

11.  Domes are also characterised by a
thrust.
 When a dome is generated by
intersection of two vaults ,
 Similar forces are applied on it.
 And additional circular force act on it
due to construction of dome in a
circular manner around a vertical axis
 This is the force which help in
balancing the dome ..
Load transfer
in dome

12.  The Bara Imambara is a famous monument of Lucknow with historical, cultural and heritage
importance
 Bara Imambara was built in 1784 by the Nawab of Awadh, Asaf -ud-Daula. It is for this reason
that it is often known as Asafia Imambara.
 The structure was built as a part of a relief project for a major famine that took place in the year
1784.

It is said that the bara Imambara is the world's largest arched room without any pillars and the
Nawabs used to hold their public hearings here.
 It is the large complex, which houses a mosque, courtyards, gateways and a 'bawali' or step-well
used as a summer palace.
 The building, which consists of three huge halls, has an amazing maze of corridors hidden in
between its walls that are about 20 feet thick. This dense, dark maze called the 'bhul bhulaiya' is
a network of more than 1000 labyrinthine passages.
Case Study : Bara Imambara

13. Construction detail
 The whole building is made of Lakhanui bricks (small size bricks) and lime plaster.
 No wood or metal has been used in the construction. This special contemporary style of
construction makes the structure unique and amazing
 The amazing hollow walls of the central hall not only keeps it cool during summer but also help to
lighten the load of the structure.
 We can view the grave of Nawab Asaf-ud-Dowlah and his crown kept in the central hall. Bara
Imambara in fact establishes a unique link with Lucknow's past.
 Best of the structure is excellent architecture that represents Lucknow's culture, art, its ethos and
Nawabi way of life which is always peculiar to Avadh (Province).
 The main hall of the Imambara is 162 ft. in length and 53 ft. 6 in. wide.

14.  The arched roof of this vaulted hall is acclaimed as an architectural wonder,
because no beams or intervening supports appear to hold the 16 ft. thick slab
which is estimated to be 2,00,000 tons in weight.
 The ceiling of the hall is 50 ft. high above the floor.
 Central hall of Bara Imambara, Lucknow In this central hall rests the grave of the
Nawab along with his crown.
 People also believe that the principal architect of the building “Kifayatullah” is
also buried in the central hall.
 Magnificent labyrinth with 489 identical doorways and more than 1000 passages

15. Literature Study: Sultan
Ahmed Mosque, Istanbul

16. Construction Detail
 At its lower levels and at every pier, the
interior of the mosque is lined with more
than 20,000 handmade ceramic tiles, in
more than fifty different tulip designs
 The Sultan Ahmed Mosque has
one main dome, six minarets, and
eight secondary domes.
 The upper levels of the interior are
dominated by blue paint. More than
200 stained glass window that’s why it
is also called Blue Mosque
The most important element in the
interior of the mosque is the
mihrab,
 The court is about as large as the mosque
itself and is surrounded by a continuous
vaulted arcade

17. Thank you