| Summary: | The increase of housing, resulted on the enhancement of timber usage as
building material. The increase of demand for timber triggers deforestation which
is increasingly endangering the preservation of nature. Therefore, there is a need
for another alternative material as a substitute for timber, one of them is bamboo.
Bamboo has several advantages when compared to timber which has a tensile
strength that almost equals to the steel and can be produced at the age of three to
five years. Bamboo as a beam element commonly has a large deflection due to a
low value of modulus of elasticity, E. To increase the stiffness, then the beam is
to be assembled into a composed bamboo beam. The consequences are required
the connection tool to withstand the slip.
This study was conducted to exemine mechanical behavior of composed
bamboo beam with mortar filler and bamboo Cendani as shear connector. In this
study adopted seven types of bamboo beam consisted one type of single bamboo
beam (BT), two types of two layer composed bamboo beam with six shear
connectors (BBSD6) and eight shear connectors (BBSD8), two types of three
layer composed bamboo beam with six shear connectors (BBST6) and eight shear
connectors (BBST8), two types of four layer composed bamboo beam with six
shear connectors (BBSE6) and eight shear connectors (BBSE8). Each type was
consist of three test specimens. The model test was performed by a four point
loading system.
The results showed an increase in load from BT to BBSD6 of 137%, BT to
BBST6 of 204% and BT to BBSE6 of 313%. For BT to BBSD8 of 157%, BT to
BBST8 of 210% and BT to BBSE8 of 327%. In the elastic condition, the moment
of inertia bamboo beam of the experiment decrease from the theoritical
calculation. The average reduction ratio for bamboo beam with 6 PG from two
layer composed bamboo beam to four layer composed bamboo beam in a row by
0,569, 0,405 and 0,234. While for composed bamboo beam with 8 PG average
decrease in the ratio from two layer composed bamboo beam to four layer
composed bamboo beam in a row by 0,705, 0,549 and 0,298.
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