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۱The Effects of Using Oil Palm Fibre on Structural Members Behaviour in Comparison With Mineral Fibres
نویسنده(ها):
اطلاعات انتشار: نخستین کنفرانس بین المللی تکنولوژی بتن، سال
تعداد صفحات: ۱۱
Oil palm fibre which is relatively low cost and widely available specifically in tropical area has the potential as polymer reinforcement in structural applications. This study initially investigated the tensile behaviour of single oil palm fibre and physical properties like diameter and density. Then, the tensile behaviour of natural fibre reinforced polymer composites as a function of fibre volume ratio, fibre length and fibre surface modification was investigated.Lastly, flexural behaviour of reinforced concrete beam strengthened with unidirectional oil palm fibre composite was tested and was compared with reinforced concrete beam strengthened with woven glass fibre composite and ordinary reinforced concrete beam. Oil palm fibre is light but high moisture content, high moisture absorption and large variance of cross section area. The fibre tensile properties are relatively low in comparison to the literature which may due to degradation problems. The stiffness of the composite is significantly improved when the fibre volume ratio increased. At 10% of fibre volume ratio, the modulus of elasticity is increased up to 150 % compare to neat resin. Higher aspect ratio yield higher tensile strength and modulus of elasticity of the composite. The effect of alkali treatment increases 10% of the tensile strength of the fibres. Oil palm fibre composite could be used as strengthening material for reinforced concrete beam by increasing the flexural strength and stiffness of the reinforced concrete beam while maintaining the ductility of the beams.<\div>

۲Nonlinear Finite Element Analysis of a Precast Grouted Type Beam–Column Connection
نویسنده(ها):
اطلاعات انتشار: کنفرانس بین المللی سبک سازی و زلزله، سال
تعداد صفحات: ۸
The integrity of the structure is directly affected by the design and fabrication of the connections. In this study, a grouted type of the precast concrete connection consists of steel connection only before grouting had been put in place. The analysis is based on nonlinear finite element analysis (NLFEA) using COSMOS\M. The behaviour of the connection is observed to predict the ultimate strength and to determine its failure mechanism. Both concrete and steel are modeled as solid element. The behaviour of the connection shows that the connection undergoes a localized failure such as concrete cracking and crushing, and possibility of yielding of steel.<\div>
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