钢管混凝土加强环式节点的有限元分析-结构工程专业论文.docxVIP

武汉理工大学硕士学位论文 ABSTRACT With the development of research of concrete-filled steel tubular structure，this kind of structure has been widely applied in construction．The joint is the key issue of application of COncrete-filled steel tubular structure．But in fact,nOW the research level of the joint of CFST lays behind迅application．BPA7．,ause of the diversity of the joint with ring stiffeners，the application of CFST is not 50 mature．The thesis is based on a practical project of Assembling Workshop of Naval Ships and Boats Supporting Product Production Line in Wuhan Marine Machinery plant co．1td． Based fill the theoretical analysis，we study the mechanical properties of this kind of joint under normal service condition． Grounded on the theoretical analysis，we make use of ANSYS to conduct the finite element analysis of the joint with solid modeling．The constitutive model of steel and concrete and the slippage between steel tube and concrete have been analyzed．The stress·strain CUlNe of the steel is assumed to be elastic-perfeetly plastic． The COnstitutive model of the concrete is more complicated,because the steel tube provide the COnfinement to the eorc concrete and then the concrete is subjected to triaxial compressive stresses．According to the former study,this paper inducts the stress—strain relationship model of the core COncrete given by professor Hart Linhai． The failure rule of the concrete is William-Warnke’five parameter rule．The slippage of steel tube and COncrete is not considered． The figures of stress distribution of the steel tube，stiffen rings and the concrete are showed in the paper．They display the deformation situation and weak areas of the joint．After analysis，the joint is still in elastic situation under normal work condition．And the results suggest that the model and the results of design is rational． The research results supplement the deficiency of study of CFST joints to some extent and provide some references to the relative study and design sta正 Key