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论文类型：期刊论文

发表时间：2009-01-01

发表刊物：International Review of Mechanical Engineering

收录刊物：Scopus

卷号：3

期号：3

页面范围：275-283

摘要：This paper presents analyse of crack origin and stress distribution of bonded steel-concrete composite beam by numerical method. A three-dimensional finite element model has been developed in this work. Before the stress analysis, results obtained via finite element model on deflexion and strain evaluations with increase of applied load are compared with those obtained by experimental test. The numerical model developed allows knowing the crack origin of the composite beam and the direction of crack propagation. The results show that compared with the other kinds of stresses, the local tensile stress in the concrete slab is the closest to the ultimate strength and causes the initial cracking in the concrete slab. Particularly, it is found that the variation of applied load width plays an important role in the determination of location and value of the maximal tensile stress in the concrete slab. However, the effect of variation of the adhesive thickness, from 3mm to 15mm, on the deflexion and the shear stress is not important. Based on the obtained results, it is concluded that the ruin of the bonded steel-concrete composite beam is not situated at the steel-concrete interface and the bonded composite beam is applicable in practice. ? 2009 Praise Worthy Prize S.r.l.