Study on the Influence of the Height of Steel Beam on Creep Effects of Composite Beams

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Zhang, Shengping^1 ; Chen, Xu^2 ; Lai, Yingliang^1

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

关键词: Axial forces;    Composite beam;    Compression zones;    Creep effects;    Exact results;    Limiting values;    Local buckling;    Section stiffness;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/3/032067/pdf
DOI  :  10.1088/1755-1315/267/3/032067

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The height of steel beam is an important parameter in the disign of structure. The effects of increasing the steel height of composite beam are quiet different from that of the pure steel beam because of composite and creep effects. To reveal the influences of this critical prarameter Rüsch constitutive equation of creep is used to obtain the exact results. With the increase of the steel height and after a limiting value is reached, the rate of the increase of the whole section stiffness becomes smaller, the rate of the increase of the compression zone of steel web becomes larger, yet the axial force and redistributed moment of concrete slab become almost constant. The deflection increases almost linearly and keeps a large slope with the increase of the steel height. Local buckling risk of the web must be considered.