钢管混凝土界面抗剪粘结性能的试验研究与有限元分析-结构工程专业论文.docxVIP

AbstractThe Abstract The shear bond problems at the interface of Concrete-Filled Steel Tube(CFST)is one which are further conccmed by more and more construction engineers and managers．The study on the shear bond behaviors at the intefface of CFST iS significant on the theory．based on the former research achievements，systematic experimental study and theoretical analysis on the shear bond behaviors have been carried out in this thesis．111e main research works were concluded as follows： 34 push-out tests ofCFST are completed in this paper，including 22 circular and 12 square CFST specimens．Based on the results of experiment，composing of shear bond force．characteristic and role of shear bond failure are discussed．The factors of effect on the shear bond strength are analyzed and the uniform relationship between bond strength with bond-slip on circular and square CFST is obtained．In addition， The strain of 2 circular and 2 square CFST specimens is tested sequentially． According to the test。the distribution of steel tube strain in course of shear bond failure is analyzed in detail． nle finite element analysis model ofthe shear bond at the interface of CFST Was also built up．Steel tubes，concrete and the interface between steel and concrete were modeled by Shell，3D Entity and Contact element，respectively．Analog calculation is carried out by use ofthe ANSYS software environments．Afterwards，the calculating results of finite element method compare with the experimental results is proved to be consistent．It is also proved that finite element analysis model Can simulate work state of shear bond failure nicety．An analysis is developed for the rmio of axial force to compressive strength that influences on shear bond strength，and the formula for bond strength and the ratio of axial force to compressive strength has been established． Keywords：CFSE shear bond strength；push—out test；bond—slip；finite element analysis 长沙理工大学学位论文原创性声明 长沙理工大学 学位论文原创性声明 本人郑重声明：所呈交的论文是本人在导师的指导下独立进行研究所 取得的研究成