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Seismic Nonlinear Damage Analysis of High-Rise Buildings Considering the Influence of Building Floor Stiffness

Author: LuoShaoHua
Tutor: GuoAnXin
School: Harbin Institute of Technology
Course: Structural Engineering
Keywords: performance-based seismic design static elasto-plastic analysis incremental dynamic analysis structure damage floor stiffness
CLC: TU973.31
Type: Master's thesis
Year: 2009
Downloads: 70
Quote: 1
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Abstract


In recent years, with the increase of seismic losing and the development of the framework of Performance-Based Seismic Design (PBSD), the investigations on structural seismic damage has attracted great attentions of the researchers. Aiming at this important theoretical and engineering issue, this paper investigates the influence of floor stiffness on the seismic demands and seismic performance of building structures, based on a 20-stories steel benchmark high-rise building, through the static elasto-plastic analysis (pushover) and Incremental Dynamic Analysis (IDA). The main contents include:(1) Using the common pushover analysis method and modal pushover analysis method (MPA), the effects of the floor stiffness on the structural static elasto-plastic analysis results are investigated. The analysis results indicate that the accuracy of structure damage evaluation by using the static elasto-plastic analysis is improved after considering of the influence of floor stiffness. However, the seismic performance and the ductility of structure are reduced, and the ductility of structure decrease with the increase of the floor stiffness.(2) Using the IDA methods, the effects of the floor stiffness on the seismic analysis results are also investigated through structural damage analysis. The analysis results indicate that the seismic performance and the ductility of structure are reduced after taking the increase of the floor stiffness into consideration.(3) Based on the analysis results of dynamic time history analysis and IDA analysis, the accuracy and reliability of structural damage evaluation by using the common pushover analysis and MPA are comprehensively compared. The results indicate that the accuracy and reliability of MPA method are better than the common pushover analysis method. Furthermore, both methods more and more underestimate the structural damage at the upper stories of the structure with the increase of the structure damage.

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CLC: > Industrial Technology > Building Science > High-rise buildings > Tall Building Structures > A variety of structural design > Seismic Design
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