Nonlinear Inelastic Analysis of Structures by Using Hysteretic Model and Frame Model
Date Issued
2009
Date
2009
Author(s)
Chao, Shu-Hsien
Abstract
The objective of this study is to develop a new algorithm to simulate nonlinear inelastic behavior of structures subjected to biaxial static or dynamic loading. First, the new biaxial constitutive hysteretic model is developed to simulate nonlinear inelastic behavior of system subjected to uniaxial or biaxial loading. The strength and stiffness deterioration, pinching phenomenon and biaxial effect can also be considered by the proposed biaxial hysteretic model. It can be used to simulate not only global but also local inelastic behavior of structures. Next, a new algorithm, which is called the modified force analogy method, is developed based on the proposed biaxial hysteretic model and theory of force analogy method. The damage condition, failure type of structural element and collapse time of structure can also be simulated by the modified force analogy method. The cyclic loading test data and dynamic collapse test data are used to verify the proposed algorithm. It is found that the proposed algorithm can simulate nonlinear inelastic behavior of structures subjected to uniaxial or biaxial loading approximately. Finally, the drift demand of different structural systems, such as steel frame (SF), reinforced concrete frame (RCF) and reinforced concrete wall building (RCWB), are studied by using incremental dynamic analysis (IDA). A total of nine generic structures with different heights, structural systems and inelastic behavior are designed according to current seismic code to realize the difference of their drift demand. The relationships between maximum inter-story drift ratio (IDRmax) and reduction factor (R) for different structural systems are constructed, and uncertainty due to ground motion is investigated. Probability of damage condition of different structural systems under different excitation levels is also discussed. The information of this study is useful to preliminary design and seismic performance assessment.
Subjects
Hysteretic model
Frame model
Biaxial load
force analogy method
Type
thesis
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