bamboo strucures : a perspecive for climate change · pdf file · 2015-07-31bamboo...
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![Page 1: BAMBOO STRUCURES : A PERSPECIVE FOR CLIMATE CHANGE · PDF file · 2015-07-31BAMBOO STRUCURES : A PERSPECIVE FOR CLIMATE CHANGE MITIGATION ... Gupta A. & SudhakarP., “Laterally restrained](https://reader034.vdocument.in/reader034/viewer/2022051010/5aa66fcc7f8b9a517d8e82b3/html5/thumbnails/1.jpg)
BAMBOO STRUCURES : A PERSPECIVE FOR
CLIMATE CHANGE MITIGATION
Dr. Chaaruchandra Arun Korde; Dr. Anurag Kandya & Dr. P. Sudhakar
Green Bam Soluions, New Delhi, Airef Engg. Pvt. Ltd.;
Pandit Deendayal Petroleum University, Gandhinagar, India;
Haritha Eco Trust, Andhra Pradesh, India
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.....What we are today, comes
from our thoughts of yesterday
and our present thoughts build
our life tomorrow....
(BUDDHA)(BUDDHA)
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Bamboo
Diameters Ranging from 20 mm to 300 mm
115 species in India and 1200 species world over
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Why bamboo
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Why bamboo
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Why bamboo
TIMBER:• Traditional methods for Timber Houses of 3-5m
span require trees of over 30 years old
• Most Farmers Need Returns in 4 - 6 years• Most Farmers Need Returns in 4 - 6 years
THE CHALLENGE:
• How to utilize it for sustainable infrastructure applications..?
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Wood from plantations: Fetches far better return as Timber
� Timber in housing 10
� Fiber pulp and Chips
& saw dust for particle board 2-3
� As fuel 1-2
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What is a structural main load bearing element (SMLBE) ?
M V
A
MV
A
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Why bamboo as SMLBE ?
Bamboo and Wood with same
cross sectional Area
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Bamboo & other WoodBamboo & other Wood
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Bamboo & Other WoodBamboo & Other Wood
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Material properties of Material properties of Dendrocalamus strictus Dendrocalamus strictus
BambooBamboo
• Allowable compressive stress = 10 MPa (NBC – 2005)
• Modulus of Elasticity = 15000 MPa (NBC – 2005)• Modulus of Elasticity = 15000 MPa (NBC – 2005)
• Tensile stress = 150 MPa
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Dendrocalamus strictus
45 % of Indian Bamboo
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Material Testing
L/d = 2
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Where is the Engineering challenge ?Where is the Engineering challenge ?
1. Development of a joinery to integrate more than two bamboos together
2. Establish reproducibility of technology
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Developed Technology
HARITHA IITD BAMCRETE (HIB) TECHNOLOGY
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Dendrocalamus strictus
45 % of Indian Bamboo
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Scientific Evaluation
45 % of Indian Bamboo
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Ultimate Load Test
MAXIMUM LOAD = 2000 kg; Span 4.5 m
Korde C., West R., Gupta A. & Sudhakar P., “Laterally restrained dual bamboo concrete
composite arch under uniformly distributed loading”, in Special Issue of Sustainable
Building Structures, Journal of Structural Engineering, ASCE, 2015.
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FAILURE PATTERNS – FRESH ARCHES
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Laterally Restrained Testing
Column Test Equipment Developed for Testing
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20
25
30
35
Load Vs DG 1
Load Vs DG 2
Load Vs DG 3
kN)
Bamcrete Column under Laterally Restrained Pure Axial Loading
DG 1 (Upper third); DG 2 (Centre) and DG 3 (Lower third)
0
5
10
15
-2 8 18 28 38 48 58 68 78
Deformation (mm)
Loa
d (
kN
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Failure Pattern
Failure of Concrete Band at 33 kN Load
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Experimental House at IIT Delhi
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Experimental House at IIT Delhi
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Experimental House at IIT Delhi
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Experimental House at IIT Delhi
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EARTHQUAKE ANALYSIS
A detail structural analysis is carried out to determine the forces and
stiffness of the structure
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EARTHQUAKE ANALYSIS
MAXIMUM ALLOWABLE DEFORMATION = 0.004 h = 10.8 mm; hence safe
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COST PROJECTON – R & D MODE
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COST PROJECTON – 27 sq. m
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0,80
1,00
1,20
1,40
1,60N
orm
ali
zed
Co
sto
f H
ou
se
COST – BENEFIT ANALYSIS: 27 sq. m house 1.17 lacks (U.S. $ 2400)
0,00
0,20
0,40
0,60
0,5 0,75 1 1,25 1,5 2
Cost of Bamboo
Strength of column
Strength of arch
Normalized variation
No
rma
lize
d C
ost
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Experiments/ constructions at Haritha
R& D in Bamboo: Buildings/ Infrastructure
Bamboo Pent House Studies