钢管混凝土柱-钢筋混凝土梁组合节点抗震性能分析-结构工程专业论文.docxVIP

ABSTRACT Taking two types of joint of concrete-filled steel tubular-prestressed concrete beam used in an underground structure project as object, quasi-static test and simulation methods were carried out to study the seismic performance of the joint. The ductility, rigidity, bearing capacity and energy dissipation capacity were comprehensively evaluated based on the test results and finite element analysis. The main achievements can be summarized as follows: (1)4 model specimens of CFST composite joints are designed and manufactured, and divided into two groups in accordance with the form.The bearing capacity and stiffness of specimens are checked according to the two Chinas current design codes. Quasi-static test was carried out to evaluate the seismic performance of the joint. The ductility bearing capacity, rigidity and energy dissipation capacity were studied based on the text results. Applied ABAQUS software, the finite element models of the 2 groups of specimens are established respectively. Nonlinear analysis was performed on CFST composite joints. To verify the rationalty of the modle, numerical analysis results were compared with the text results. The experimental results indicate that the seismic performance of the joint is good. High ductility, bearing capacity and energy dissipation capacity are observed. Considering the displacement demand in the severe seismic event, the deformation of joint core area is small, and damage is not developed. The requirements of the design are met. Using the finite element analysis to simulate the hysteretic behavior of the specimens, compare with the text results, the force-displacement curve obtained from finite element analysis agrees well with the text results. The modeling approach of the joint is correct. KEY WORDS: composite joint of concrete-filled steel tubular-RC beam; seismic performance; quasi-static; test; simulation methods 目 录 第一章 绪 论1 1.1 课题的研究背景和意义 1 1.2 钢-混凝土组合节点的研究现状1 1.2.1 钢管混凝土柱-钢梁连接节点 1 1.2.2 钢管