BMT Presentation

8/3/2019 BMT Presentation

http://slidepdf.com/reader/full/bmt-presentation 1/19

Bibhuti Bhushan Bhardwaj

(CIB-09-016)

&

Azaz Ahmed

(CIB-09-015)

Presented By-



Introduction

Shelter

Economical

Orthodox designs

Functionality

Adaptability

Economical

Aesthetic

Safety FirstGreen building

Multipurpose

OLD CONCEPT

MODERN CONCEPT



Modern building

materials

Modern innovative

technologies

Smart materials

Polymers

Earthquake-pr oof ing

Fire-pr oof ing

Exoskeleton

Ensu

res Structures that are

Fully f unctional

Aesthetically beautif ulResistant to natural & accidental calamities

Envir onment f riendly

Capable of soaring towards the sky



Smart Materials Also known as

Intelligent materials

Active materials

Adaptive materials

Capable of responding

to changes in the

environment in a useful

and repetitive manner.

Shape Memory Alloys (SMAs)

Magnetostrictive Materials

Electro Rheological Fluids

Piezoelectric Materials

Carbon Fibre Reinforced Concrete (CFRC)

Smart Concrete



Shape Memory Alloys (SMAs)

Composed of alloys of Ni ± Ti or C u ± A l ± Z n

Undergo large strains at the end of the

deformation pr ocess

Great potential to enhance civil engineering

structures

Pre-existing and new applications in the f ields

of damping, active vibration contr ol and pre-stressing or post-tensioning of structures



Magnetostrictive Materials

Capable of changing its shape/ physical dimensions when it is subjected

to a magnetic f ield.

Electro Rheological Fluids

Suspension of extremely f ine non conducting particles

The apparent viscosity of these f luids changes reversibly by an order of

up to 100,000 in response to an electric f ield



P iezoelectric Materials

Pr oduce a voltage in response to an

applied force.

A change in dimensions can be

induced by the application of a voltage

to it.



C arbon Fibre Reinforced C oncrete ( C FR C )

Conducts electricity

Capacity to change its conductivity with mechanical stress

Durability superior to metals and plastics.

Smart C oncrete

Developed Dr. Deborah, D.L. Chung f r om State University of New York

Reinforced by carbon f ibre

High sense ability to strain or stress

Adding short carbon f ibre into concrete, the electrical resistance of

concrete can be increased.



Synthetic polystyrene or polyurethane foam

+

used in combination with structural materialsused in combination with structural materials

Light weight

Easily shaped

Excellent insulator.

Used as part of a structural

insulated panel

Foam

Wood/Cement

Foam

Wood/Cement



Some Modern Technologies:

Sound- P roofing

Vinyl can be used to stop the transf er of noise.

Lead Lined Sheetr ock is an excellent noise reducer, but can cost

` 6250-12500 per piece of sheetr ock

Fire- P

roofing Earlier, asbestos was used for f irepr oof ing, either on its own, or together with

binders such as cement.

Now a days, Firepr oof ing plasters are used viz.

Gypsum plasters

Cementious plasters

Fibrous plasters



Earthquake resistance technology

Earthquakes can collapse buildings and

other structures

Liquefaction a major challenge

faced by buildings during earthquake

Earthquake Resistant Techniques to

overcome those

1. Base Isolation for Earthquake Resistance

2. Using of Energy Dissipation Devices.

e.g. Dampers



Case studies

Burj-Khalifa, Dubai

Tallest building in the world (828m)

Costs- ar ound ` 7500 cr ores

Advanced cladding panels maximize resistance

against heat transmission f r om the sun & thus savingenergy thr ough high per formance ref lective glazing

Highest installation of glass and aluminium f acade

Materials used:

Dow Corning 993 Silicone

Dow Corning 798 Cold & Clean r oom silicone

sealant for sealing the exclusive bathr ooms



Burj-Al-Arab, Dubai

Dow Corning 993

Dow Corning 984

Dow Corning 785

Dow Corning Q3-3793

T allest hotel in the world (32 1m)

T echnology involved-

Installation of dampers to counter

effect vortex shedding

Materials Used



Taipei 101, Taiwan

Total height is 508m

It costs ar ound ` 350 cr ores.

Technologies involved

Hysteretic Dampers

Velocity Dampers

To overcome-

Typhoon winds

Large potential earthquakes

Weak soil conditions



Dubai Infinity Tower

First building on earth having twists of f ull

90 degrees f r om its base to its cr own .

It has a total height of 306.9 metres

As the perimeter columns ascend f r omstory to story, they lean in or out, in a

direction perpendicular to the slab edge.



Comparatively str ong and reliable

For example, steel is more reliable as well as str onger than

ordinary bamb

oo o

r such typeof

things.

Unlike others they are not enhancing deforestation.

Because of its durability, its pr oves economical in the long run.

Advantages of Modern Building Materials



Disadvantages of Modern Building Materials

High Initial cost

Can not be afforded by developing / underdeveloped

countries

Complex pr ocesses involved in repair / replacement

Can¶t be pr ocured easily ( Unavailability )

High technical staff required for construction/installation.



C onclusion

Modern materials have an upper edge over the old conventionalmaterials

But

Complex process involved in their Manufacturing process

High skills required for implementation &

Unavailability

Chief ly responsible for their low usage in developing countries like

India where locally available resources such as bamboo, thatch,

mud, brick, mortar etc are given more precedence.



Documents

BMT Presentation