鋼管煤矸石混凝土壓彎構(gòu)件動(dòng)力性能的有限元分析.pdf

1、沈陽建筑大學(xué)碩士學(xué)位論文鋼管煤矸石混凝土壓彎構(gòu)件動(dòng)力性能的有限元分析姓名：舒錚申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：李幗昌2010-01碩士研究生學(xué)位論文 Abstract III Abstract Gangue concrete filled steel tube (GCFT) is a new kind of structure to fill the steel tube with the

2、gangue concrete instead of the ordinary concrete, which can provide excellent seismic resistant structural properties such as high strength, high ductility, and large energy absorption capacity. I

3、n addition, it is lighter and more economical than the ordinary concrete filled steel tube. And with the use of industrial waste, gangue, people can reduce the cultivated land occupation, cont

4、rol environmental pollution and create great economic benefits and social benefits. Therefore, it has a great perspective of development in China. However, the current research of light aggregate

5、 concrete filled steel tube mainly focused on the static behavior. There were hardly any researches on its dynamic behavior. The nonlinear finite element program Abaqus is conducted to analyze

6、 the dynamic behavior of circular GCFT beam- columns. And an effective approach to build the finite element model is proposed, which can simulate the GCFT beam- columns subjected to cyclic loads

7、 accurately. In order to investigate the dynamic behavior of GCFT beam- columns in depth, the main work is done as follows: the nonlinear finite element program Abaqus/Standard 6.7 is conducted

8、 to simulate 8 circular GCFT beam- columns subjected to cyclic loading. The material constitutive model and the finite element model for GCFT beam- columns is studied, the stress distribution and

9、 the failure mode of the steel tube and the gangue concrete core during the loading process are analyzed. The P- ? and M- f hysteresis curves and the skeleton curves are calculated. The pr

10、imary parameters considered to influence the P- ? and M- f hysteresis skeleton curves are analyzed, including the axial compression ratio, the steel ratio and the strength of materials. Furtherm

11、ore, we can investigate the P- ? and M- f restoring force model and the simplified calculating methods of displacement ductility coefficient. According to the analysis of the nonlinear finite

12、element calculating results, the influence of the axial compression ratio and the steel ratio on axial deformation, load- strain curve, stiffness degrading, energy absorption and displacement ducti

13、lity is explored. The dynamic behavior of the GCFT beam- columns is studied in depth. The results of numerical simulations for load- displacement (P- ? ) hysteresis curves of the GCFT beam- colum

14、ns are verified against the experimental data. Generally, the numerical results show very good agreement with the experimental data which indicates that the finite element model and the material

15、 constitutive model adopted in this paper can simulate the GCFT beam- columns subjected to cyclic loading well, which also indicates that the analysis and the conclusion based on the numerical