PENGARUH JENIS PEREKAT TERHADAP KERUNTUHAN LENTUR BALOK LAMINASI GALAR DAN BILAH VERTIKAL BAMBU PETUNG
| Main Author: | Gunawan, Purnawan; Jurusan Teknik sipil Fakultas Teknik UNS Surakarta |
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| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Media Teknik Sipil
, 2009
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| Subjects: | |
| Online Access: |
http://puslit2.petra.ac.id/ejournal/index.php/mts/article/view/17271 http://puslit2.petra.ac.id/ejournal/index.php/mts/article/view/17271/17216 |
Daftar Isi:
- Bonding technology in the term of lamination technique is the technique of merging small material with limited size into material that have bigger, longer, wider and thicker dimension. Synthetics commercial glues which commonly being used in Indonesia for wood bonding processes are urea formaldehyde and melamine formaldehyde. The natural weaknesses of laminated bamboo beam are bending and shear failures. The objectives of this research are to observe the influence glue type and the element of laminated beam of bamboo petung in bending and shear rupture. Preliminary test has been conducted to know more about the physical and mechanical behavior with ISO 3129-1975 standard. Two kinds of tests, bending and shear tests, have been carried out on both stripped and flatted laminated bamboos. Flatted beam was arranged with 13 layers of flatted bamboos, while stripped beam was made by almost 65 stripped bamboos that were arranged into 5 lamination layers. Cold pressure processes of urea and melamine were used on these vertical layers of laminated beam. Hydraulics jack was used to make 2.5 MPa pressure. Four points statically load system was applied on both bending and shear tests. From the preliminary tests on bamboos from Magelang have been noted that the moisture content and the density were 12.48% and 0.98 g/cm3, respectively. The mechanical behavior indicated the compression parallel and perpendicular, tensile, modulus of rupture, modulus of elasticity, shear strength were 62.53 MPa, 14.54 MPa, 203.374 MPa, I62.34 MPa, 13589 MPa and 9.18 MPa, respectively. Nevertheless, from the preliminary tests on bamboos .from Wates indicated that the moisture content and the density were 23.75% and 0.702 g/cm3 while the mechanical behavior were 44.468 MPa, 13.407 MPa, 157.065 MPa, 117.39 MPa, 18209 MPa and 10.20 MPa, respectively on similar parameters above. From the values of moment, stiffness and Modulus of Rupture (MOR) parameters in bending and shear tests, it can concluded that the strength stripped laminated beam was higher than that of flatted laminated.