Study on the Influence of Reinforcement on Creep and Shrinkage Effects of Composite Beams

[摘要] To obtain time-dependent behaviours of composite beams, the system of differential equations is established by Rüsch constitutive equation of creep. Rigorous solutions of the system are obtained by computer programs of the authors. Creep and shrinkage effects involve internal force redistribution and deflection increase, and these are significantly large for composite beam. Parameter analyse of the reinforcement of concrete slab on these effects is conducted. Among them the reinforcement aggravates significantly the reduction of axial force between individual sections and alliviates slightly the increase of deflection of the beam.

[发布机构] Department of Construction Engineering, Kunming University of Science and Technology, Kunming, Yunnan; 650504, China^1;Department of Urban and Rural Construction and Engineering Management, Kunming University, Kunming, Yunnan; 650500, China^2

[效力级别] 生态环境科学 [学科分类] 环境科学（综合）

[关键词] Axial forces;Composite beam;Creep and shrinkages;Individual sections;Internal force redistribution;Rigorous solution;System of differential equations;Time-dependent behaviour