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朴性武 嶺南大學校工業技術硏究所 1992 연구보고 Vol.20 No.2
It is reported that flexural strength of lightweight concrete beams is simillar to that of normal weight concrete beams, but shear strength is not. The shear characteristics of lightweight concrete beams are low shear strength and sudden failure of concrete. To evaluate the shear strength of lightweight concrete beams, it is needed to investigate the effects of amin parameters on shear strength of beams. In this paper, main objective is to study shear strength of lightweight concrete beams, especially the relationships of shear strength and shear span to depth ratio, longitudinal reinforcement ratio. To achieve the relationships of parameters and shear strength of lightweight concrete beams, 6 specimens were tested. The result of this study indicate that shear strength of lightweight concrete beams are3 largely depended on shear span to depth ratio and longitudinal reinforcement ratio.
鐵骨보와 輕量콘크리트 슬라브로 구성된 合成보에서 쉬어 코넥터의 强度에 關한 硏究
朴性武,朱基秀 嶺南大學校 工業技術硏究所 1995 工業技術硏究所論文集 Vol.23 No.2
From the previous experimental test results, it has shown that shear strength in lightweight concrete beams was about 85% on that in normal concrete beams. It is speculated that shear connectors in composite beams of steel and lightweight concrete associated with the longitudinal shear strength decrease more in strength than those in normal concrete. So this paper, as a study on strength of shear connectors in composite beams of steel and lightweight concrete slabs, has a purpose to compare the strength formula resulted from the push-out test of thirteen solid slab and four Deck Plate slab with the established ones, and then the suggest a proper strength formula of the shear connectors. The established strength formula of the shear connectors is prescribed for ?? by AISC code. but from the experinental test results the strength values of the shear connectors in lightweight concrete slabs shows 70% on those of the shear connectors in normal concrete slabs by AISC code. Therefore, as a strength formula this paper suggests to multiply the established strength formula by reduction factor(Ф=0.7)