Analysis Of Mechanical Behavior For I-Section Short Deep Steel Beam Considering The Effects Of Shear Deformations

Because of the small span-height ratio, shear deformation becomesthe component which can not be ignored on the mechanical properties ofshort deep beam. The Euler-Bernoulli beam theory ignores thecross-section shear deformation, the calculation process will cause largeerrors and make the structural design unsafe. With the span depth ratio ofcomponent decreases, the plane section assumption turns to not conform tothe actual situation. If the plane section assumption still able to apply forshort deep steel beam calculation analysis and design process needs furtherstudy and demonstration. Due to such small cross-high short deep beamcomponent is usually used for large-scale steel construction, thedestruction and collapse of the whole structure may be caused by thecomponent damage, which can result in serious casualties and lead to hugeloss of property. Therefore, analysis and research of the mechanicalproperties of short deep steel beam considering the impact of sheardeformation has important theoretical significance and practical value.This thesis researches I-section short deep steel beam, work mainlyincludes:Based on references of home and abroad, this thesis makes a briefreview and presentation of the history of the development of beam theoryand a detailed description on the expressing form of the Euler-Bernoullibeam theory, Timoshenko beam theory, higher order shear deformationbeam theory and geometrically exact beam theory, reviews thedevelopment history of short deep beam at home and abroad, expounds theresearch status and present problems, and puts forward the main research contents of this thesis.Finite element models of I-section short deep steel beams withANSYS software is established, and deformation and stress calculations ofI-section short deep steel beams with different beam theory and varieties ofspan-height ratio and section size are obtained by numerical simulation.The applicability of the traditional beam theory and the plane sectionassumption is discussed, and through the parameter analysis of I-sectionshort deep steel beams, we get the influence of different parameters oncomponent deformation and stress. Based on finite element analysis results,we obtained more reasonable deflection calculation method of I-sectionshort deep steel beams. The same time, the variation of the maximumstress with span-height ratio and the cross-sectional size is explored, thenormal stress formula of the short deep steel beams under uniform loads isderived, and additional stress caused by shear deformation is analyzed. Inaddition, using the steel beam stability theory, we obtain the formula forthe ultimate load of the simply supported steel beam under uniform loadwithout considering the cross-section shear deformation. Comparing thetheoretical solution obtained through calculation formula and the finiteelement solution calculated by ANSYS software, we analyze the impactfor the overall stability of the short-deep steel beams. by the sheardeformation at last.Finally, this thesis summarizes the main research results of thisarticle, and put forward the prospect of study in short deep beam in future.