COMPARISON BETWEEN THE VIBRATION PERFORMANCE OF LVLCONCRETE COMPOSITE (LCC) FLOORING SYSTEM MADE OF MALAYSIAN AND NEW ZEALAND LVL
DOI:
https://doi.org/10.11113/mjce.v27.15944Keywords:
Laminated veneer lumber, LVL-concrete composite, floor vibrationAbstract
Laminated Veneer Lumber (LVL) was categorized in engineered wood which it can be produced in billets up to 18 m long and 1.2 m wide. LVL is a high stiffness material, almost three times the strength of sawn timber. It is also more reliable and with a higher modulus of elasticity. However, modern technologies led to longer span flooring system, the higher flexibility of the LVL may be susceptible to vibrations of the system. This paper investigates the vibration performance of long span LVL-concrete composite (LCC) flooring system. LCC is a hybrid system made of a concrete slab and a LVL joist, with shear connectors to prevent slip. LVL is extensively used in Australasia as main structure for timber buildings, but not in Malaysia. The LCC was modelled with the finite element software package SAP 2000 v.15 to determine the natural frequency and mode shapes of the specimens. The properties of LVL Malaysian were obtained from mechanical testing and both properties from Malaysia and New Zealand were implemented in the Finite Element (FE) model to compare their vibration performance respectively. Since the flooring system was designed as a lower resonance frequency floor, the results show that the natural frequencies of the modeling are more than 8 Hz. The vibration performances of the floors with New Zealand and Malaysian LVL were found to be greatly similar, with natural frequency of about 9 Hz to 10Hz for 8 m span length respectively.References
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