高層結(jié)構(gòu)建筑外文翻譯--框架橫向剛度估計和橫向剛度線性與非線性的連續(xù)模型的靜力分析-文庫吧資料
2025-05-21 14:13本頁面
【正文】 ba Ero?glu Sinan Akkar Abstract： Continuum model is a useful tool for approximate analysis of tall structures including momentresisting frames and shear wallframe systems. In continuum model, discrete buildings are simplified such that their overall behavior is described through the contributions of flexural and shear stiffnesses at the story levels. Therefore, accurate determination of these lateral stiffness ponents constitutes one of the major issues in establishing reliable continuum models even if the proposed solution is an approximation to actual structural behavior. This study first examines the previous literature on the calculation of lateral stiffness ponents (. flexural and shear stiffnesses) through parisons with exact results obtained from discrete models. A new methodology for adapting the heightwise variation of lateral stiffness to continuum model is presented based on these parisons. The proposed methodology is then extended for estimating the nonlinear global capacity of moment resisting frames. The verifications that pare the nonlinear behavior of real systems with those estimated from the proposed procedure suggest its effective use for the performance assessment of large building stocks that exhibit similar structural features. This conclusion is further justified by paring nonlinear response history analyses of singledegreeoffreedom (sdof) systems that are obtained from the global capacity curves of actual systems and their approximations puted by the proposed procedure. Key words: Approximate nonlinear methods Continuum model Global capacity Nonlinear response Frames and dual systems 1 Introduction Reliable estimation of structural response is essential in the seismic performance assessment and design because it provides the major input while describing the global capacity of structures under strong ground the advent of puter technology and sophisticated structural analysis programs, the analysts are now able to refine their structural models to pute more accurate structural response. However, at the expense of capturing detailed structural behavior, the increased unknowns in modeling parameters, when bined with the uncertainty in ground motions, make the interpretations of analysis results cumbersome and time consuming. Complex structural modeling and response history analysis can also be overwhelming for performance assessment of large building stocks or the preliminary design of new buildings. The continuum model, in this sense, is an acplished approximate tool for estimating the overall dynamic behavior of moment resisting frames (MRFs) and shear wallframe (dual) systems. Continuum model, as an approximation to plex discrete models, has been used extensively in the literature. Westergaard (1933) used equivalent undamped shear beam concept for modeling tall buildings under earthquake induced shocks through the implementation of shear waves propagating in the continuum media. Later, the continuous shear beam model has been implemented by many researchers (. Iwan 1997。lkan and Akkar 2020。 Chopra and Chintanapakdee 2020) to approximate the earthquake induced deformation demands on frame systems. The idea of using equivalent shear beams was extended to the bination of continuous shear and flexural beams by Khan and Sbarounis (1964). Heideb
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