钢混凝土混合结构动力性能研究-结构工程专业论文.docxVIP

青岛理工大学工学硕士学位论文Abstract 青岛理工大学工学硕士学位论文 Abstract In the recent years．people excogitate a new kind of structural fbⅡn———_the steel·concrete mixed structure which has been widely applied，according to the merit of both the steel structure and concrete structure in tall buildings． In this paper,seismic behaviors ofthe steel-concrete mixed structure are studied， and these work has been done：In the first place，the finite element method of bar system is used to f01Tn the stiffness matrix where steel and concrete composite beams and CFST columns are dispersed as the normal 3-D bar element，and the concrete core tube is dispersed as the open thin-walled bar element．In the next place，the dynamical respond of steel—concrete mixed structures in different stiffness match is studied and compared with reinforced concrete models on the base of a built project by the use of sap2000．The carried out dynamical analysis includes the mode analysis， response—spectrum analysis and time-history analysis which comprises two kinds of earthquake record，and analytical objects include the peak displacement，interbedded displacement，fundus shearing force，shear wall force，column force and beam force． In the end，the formulas ofthe cyclic t}equency，peak displacement，structural internal force are deduced about the simplified model of the mixed structure by the use of the finite element method of bar system,which show the reaction mechanism and Call be used to analyse the steel-concrete mixed structure approximately． At laSt，the sum-up ofthis paper and some helpful advices for the future research are given． Keywords：steel—concrete mixed structure；finite element method ofbar system steel structure seismic behaviors；spatial analysis 青岛理工大学工学硕士学位论文第1章绪论 青岛理工大学工学硕士学位论文 第1章绪论 在20世纪80年代以前，我国的高层建筑结构大多采用钢筋混凝土结构形式， 但随着层数和高度的不断增加，建筑使用功能也日趋复杂，该结构形式已不能完 全满足建筑高度和使用功能的要求。因此，在国内钢筋混凝土结构的成熟理论和 设计经验的基础上，结合国外对钢结构和钢一混凝土组合结构构件在高层建筑研 究成果和设计方法，人们研究开发出一种新型的结构形式——铜一混凝土混合结 构，并在高层建筑中大量应用。 1．1钢．混凝土混合结构体系及特点 1．1．1结构体系 高层建筑钢一混凝土混合结构