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RISS 인기검색어
- 검색키워드
- 저자 : Jee Hock Lim (검색결과 2 건)
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Flexural Behaviour of Reinforced Lightweight Foamed Mortar Beams and Slabs
Yee Ling Lee,Jee Hock Lim,Siong Kang Lim,Cher Siang Tan 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.8
This paper presents the experimental results on flexural behaviour of reinforced concrete beams and slabs made of lightweightfoamed mortar with density ranged from 1700 to 1800 kg/m3. Beam specimens consist of seven lightweight foamed mortar beamsand three normal weight concrete beams acted as the control sample. Whereas, slab specimens contain two lightweight foamedmortar slabs and two normal weight concrete slabs. Four types of lightweight foamed mortar with different cement-sand ratios andwater-cement ratios designated as LW-1, LW-2, LW-3 and LW-4 were produced in order to achieve targeted compressive strength of20 MPa at 28 days for structural usage. The results showed that reinforced lightweight foamed mortar beams sustained about 8% to34% lower ultimate load as compared to normal weight reinforced concrete with same reinforcement configuration. However,lightweight foamed mortar slab sustained higher ultimate load, averagely 18% as compared to normal weight slab. Apart from that, itwas observed that the both reinforced lightweight foamed mortar beams and slabs were weak in resisting shear forces nonethelessflexural failure cannot be ignored entirely due to the presence of excessive yielding of the steel strain data.
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Je Chenn Gan,Jee Hock Lim,Siong Kang Lim,Horng Sheng Lin 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.1
Cold-Formed Steel (CFS) is widely used as secondary framing material. Nowadays, the research of CFS as a primary steel roof truss system became more favoured. Therefore, it is very important to understand the behaviour of CFS roof trusses due to the uncertainty of the confi guration of CFS roof trusses can aff ect its structural integrity. The objective of this research is to investigate the eff ect of heel plate length and thickness to the ultimate load capacity of CFS roof truss system. Nine diff erent lengths and thicknesses of heel plate specimens were fabricated and subjected to concentrated loads until failure. The highest ultimate capacity for the experiment was 28 kN. Local buckling of top chords adjacent to the heel plate was the primary failure mode for all the heel plate. The results showed that the increment of the length and thickness of the heel plate had slightly increased the ultimate capacity, but decrease the defl ection. The behaviour of the numerical results showed a good agreement with the experimental results. Numerical load capacity was higher than experimental load by an average ratio of 1.12. The behaviour of the bottom chord for both results was diff erent after the load reached 20 kN.
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