Author(s): Liu Muyu, Chen Qifeng, Zhang Qiang, Hubei Key Laboratory of Roadway Bridge& Structure Engineering, Wuhan University of Technology, China Railway Major Bridge Reconnaissance & Design Institute Group Co., Ltd.
Pages: 70-79
Year: 2015 Issue:  10
Journal: China Civil Engineering Journal
Keyword:  shear stubs; elastic rotational restraint; steel-concrete composite girder; girder experiment; critical buckling stress; shear buckling of web plate;
Abstract: Rotational restraint coefficient formula of steel-composite boundary and local buckling critical coefficient formula under shear of steel-concrete composite beam webs considering the rotationally restrained were deduced based on the Ritz variational method and plate buckling theory.The rotational restraint coefficient χ in web of steel-concrete composite girder,influenced by the longitudinal spacing distance s of shear stubs and transverse spacing distance li,plays an important role in the local buckling critical coefficient of webs.7 steel-concrete girders were tested,in which longitudinal spacing distance s of shear stubs and transverse spacing distance liwere changed to verify the rotational restraint coefficient formula and local buckling critical coefficient formula considering the rotationally restrained.The theoretical and experimental results agreed well with each other,which proved the effectiveness and correctness of the proposed method.