| Penulis/Author |
TEGUH MULYO W (1); Ir. Ali Awaludin, S.T., M.Eng., Ph.D., IPU., ACPE. (2); Ir. Suprapto, Ph.D., IPM. (3) |
| Abstrak/Abstract |
ABSTRACT
The using of wood beam for structural purposes are still wood-oriented of good type and quality. Along with the
increasing use of wood in the field of construction, the availability of large size wood and good quality becomes
more limited. Moving from previous research on weak wood composite, an idea was made to analyze the strength
of bending of logs from weak wood through composite engineering. Sengon wood is weak wood with compretion
strength 16,91 MPa, tensile strength 46,33 MPa, shear strength 3.51 MPa, flexural strength 23,52 MPa, MOE
4210,99 MPa and classification of E6. Component press lamina keruing with compretion strength 47,58 MPa.
Component tesile plate steel with tensile strength 267,28 MPa. The maximum load of intact sengon beam (BSU)
8.04 kN while the composite laminated beam (BLK) of maximum load of 16.82 kN increased 109%. The flexural
elasticity module of BSU 7.002,62 Mpa while the BLK of 10,419 MPa increased 49%. Flexural strength BSU
20.65 MPa while at 39.72 MPa BLK increased 92%. BSU rigidity at 6.4 kN proportional load is 153,02 while at
BLK 325,06 it increases 112,43%. The curvature of BSU -77.42 at maximum load of 8.04 kN whereas in BLK is -
24.03 increased 69%. The efficiency structure of the BSU is 1.07 and in the BLK 1.24 is increased by 15.89%.
The pattern of BSU failure is brittle on linear loading with disconnected fibers. While BLK sengon damage does
not cause the beam collapsed because it is still held steel plate and lamina keruing. The analysis for live load is
350 Kg / m2, then the maximum load is 10.5 kN. At BLK able to withstand the maximum load of 16.82 kN, th e
concept of this laminated composite beam can be used as a structural beam.
Keywords: sengon, beams, composites, structural beams. |
