钢梁—型钢混凝土柱节点受力性能的有限元分析-结构工程专业论文.docxVIP

Subject：Element Subject：Element Analysis on The Behavior ofJoints Between Steel Beam And Steel Reinforeed Concrete Columns Specialty：Structural Engineering Name：Lan Shengning(Signature)丝!幽幽 Instructor：Yan Yuemei(Signature)2丝丝兰塑垒： ABSTRACT Steel reinforced concrete structure will be one of main structures used in啦血buildings in the future，But the research on properties of this structure isnt sophisticated．In order to developamorethoroughunderstandingofthebehaviorofSRC beam—columnjoints，the study on nonlinear finite element analysis is very necessary．In this paper,the SRC column and steel beam joints ale analyzed by the ANSYS nonlinear finite element sothvare under low reversed cyclic loading． Separate-finite element model is adopted in this letter．Different element types are used in the models．Integral—finite element model is adopted in reinforced concrete and steel bars a∞ diffused in concrete．Bond-slip behavior is not taken into account between all components on the core of the sRc joints．The behavior of joints is analyzed by nonlinear finite element method．According to result of calculation,three failure types are obtained by analyzing the stress and strain of shaped steels，that is beam failure type，mixed failure type and shear failure type．After that the hysteresis loops ate analyzed,which are compared with steel joints．The result showed the finite element models call economize time ofcalculation and satisfy request ofcalculationaccuracyforthejointsofbeamfailuretype．However,it showedthemodels Can produce a little error for thejoints ofshear failure type． On the basis of these，An analysis is developed for influence parameters that have some influence on joints’behavior．The results show that axial ratio has a good effect on crack loading and ultimate loading．That the higher axial ratio is，the higher crack loading and utmost loading iS．However increment ofaxial ratio Can enhance force．displacement effect and degenerate stiffness ofjoints，SO axial ratio must be l