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

.....What we are today, comes

from our thoughts of yesterday

and our present thoughts build

our life tomorrow....

(BUDDHA)(BUDDHA)

Bamboo

Diameters Ranging from 20 mm to 300 mm

115 species in India and 1200 species world over

Why bamboo

Why bamboo

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..?

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

What is a structural main load bearing element (SMLBE) ?

M V

A

MV

A

Why bamboo as SMLBE ?

Bamboo and Wood with same

cross sectional Area

Bamboo & other WoodBamboo & other Wood

Bamboo & Other WoodBamboo & Other Wood

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

Dendrocalamus strictus

45 % of Indian Bamboo

Material Testing

L/d = 2

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

Developed Technology

HARITHA IITD BAMCRETE (HIB) TECHNOLOGY

Dendrocalamus strictus

45 % of Indian Bamboo

Scientific Evaluation

45 % of Indian Bamboo

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.

FAILURE PATTERNS – FRESH ARCHES

Laterally Restrained Testing

Column Test Equipment Developed for Testing

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

Failure Pattern

Failure of Concrete Band at 33 kN Load

Experimental House at IIT Delhi

Experimental House at IIT Delhi

Experimental House at IIT Delhi

Experimental House at IIT Delhi

EARTHQUAKE ANALYSIS

A detail structural analysis is carried out to determine the forces and

stiffness of the structure

EARTHQUAKE ANALYSIS

MAXIMUM ALLOWABLE DEFORMATION = 0.004 h = 10.8 mm; hence safe

COST PROJECTON – R & D MODE

COST PROJECTON – 27 sq. m

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

Experiments/ constructions at Haritha

R& D in Bamboo: Buildings/ Infrastructure

Bamboo Pent House Studies

CHOICE IS OURS

Sustainable Technology

Technology to Just sustain

THANK YOU

chaarukorde27@gmail.com