某大底盤多塔結(jié)構(gòu)動(dòng)力彈塑性時(shí)程分析
[Abstract]:With the rapid development of economy in China, more and more urban complex buildings have been built. This kind of structure is large in size and complex in dynamic characteristics, most of which are high rise buildings, so it is of great significance to study the seismic behavior of these structures. Dynamic elastoplastic time-history analysis is an important method to study the seismic performance and performance-based design of large chassis multi-tower structures. Therefore, it is of great significance to study the dynamic elastoplastic time history of large chassis multi-tower structures. In this paper, some valuable results are obtained in the following aspects: (1) the progress of dynamic elastoplastic analysis of structures is summarized. The seismic response analysis methods of structures are reviewed briefly. (2) the methods and difficulties of time history analysis of reinforced concrete structures, including the selection of element and material constitutive models, are analyzed on the platform of ABAQUS, a general finite element software. Simulation method of reinforced concrete member, etc. The method of determining the direction point of fiber beam element is discussed in detail, the concrete calculation formula is given, and the feasibility of this method is verified. (3) the principle of reinforced concrete fiber beam element based on stiffness method is summarized. Based on the constitutive model proposed in the current code for the design of concrete structures, a subprogram of VUMAT user materials suitable for fiber beam concrete materials is developed. Taking a reinforced concrete frame excited by seismic wave as an example, the correctness of the subroutine and the feasibility of the simulation method of reinforced concrete members proposed in this paper are verified. (4) taking a practical multi-tower structure project with large chassis as an example, This paper introduces the methods of seismic performance analysis, including the determination of the structure exceeding the limit, the seismic measures and calculation analysis for the structure exceeding the limit, the analysis of the two lines of defense and the adjustment of the internal force for the frame shear wall structure. And the application of performance-based design in the project. (5) the dynamic elastic-plastic time history analysis of the structure based on ABAQUS is carried out, and the results (including structural displacement, displacement angle, base shear force and so on) are analyzed. The accumulative compressive damage of shear wall and the strain of frame column are discussed. The results show that the structure meets the requirements of seismic fortification.
【學(xué)位授予單位】:清華大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:TU973.31
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