Open AccessStudy on the Influence of the Height of Steel Beam on Creep Effects of Composite Beams
Author(s) -
Shengping Zhang,
Chen Xu,
Yingliang Lai
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/267/3/032067
Subject(s) - creep , materials science , composite number , beam (structure) , deflection (physics) , limiting , slab , buckling , composite material , stiffness , structural engineering , physics , engineering , classical mechanics , mechanical engineering
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.