Research on Flexural Performance of Bolted Steel-Concrete Composite Beams
In order to clarify the applicability of friction type of high-strength bolts in steel-concrete composite beams,bending performance tests were conducted on full-scale specimens of bolted steel-concrete composite beams to obtain the data of ultimate bearing capacity,initial bending stiffness and interface slip.In addition,a finite ele-ment model of bolted steel-concrete composite beams was established by ABAQUS software,which the reliability was verified through experiments.On this basis,parametric analysis was conducted,the effects of bolt pre tension and bolt grade on the bending performance was discussed.The research results indicate that the specimens exhibit typical bending failure,and the interfacial friction generated by bolted connections can effectively transmit longitu-dinal shear forces,resulting in higher initial bending stiffness,bearing capacity and plastic deformation capacity of bolted steel-concrete composite beams;The increase of bolt pre tension has little effect on the ultimate bearing capacity and initial bending stiffness,but it can effectively improve their sliding loading;the increase of bolt grade will cause a decrease in the initial bending stiffness and sliding load of bolted steel-concrete composite beams.The research results provide a reference for the application of high-strength bolts in prefabricated composite beams.
composite beamhigh-strength boltprefabricated typebending performancetest research
国家科技期刊平台
NSTL
万方数据
