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Development of Practical Method for Reliability-based Seismic Design and Assessment of Building Frames based on Maximum Drift

基于可靠性的抗震设计实用方法的开发和基于最大位移的建筑框架评估

基本信息

批准号：
17560500
负责人：
MORI Yasuhiro
金额：
$ 1.92万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

Predictors of seismic structural demands such as inter-story drift angles that are less time-consuming than nonlinear dynamic analysis (NDA) have proven useful for structural performance assessment and for design. Several techniques have been proposed using the results of a nonlinear static pushover analysis. These techniques often use the maximum response computed via NDA of the inelastic oscillator that is "equivalent" to the original frame. In practice, it is desirable to estimate the response approximately via a simpler method such as an equivalent linearization technique and uniform hazard spectra at the site. In reliability-based seismic performance assessment and design of a structure, it is necessary to consider the level of accuracy of the techniques used in the assessment. A simple technique is proposed in this paper to estimate the r-year return period value of the inter-story drift angle of a moment resisting steel frame using a single uniform hazard spectrum of the r-year return period displacement of an elastic oscillator. The structural demand is estimated using the safety factors evaluated taking the variability in the seismic hazard, accuracy of the techniques for estimating structural response, and the structural performance level into account. The accuracy of the technique is investigated relative to the structural demand estimated more directly from the probability distributions of the seismic hazard.

预测抗震结构的需求，如层间位移角，这是更少的时间消耗比非线性动力分析（NDA）已被证明是有用的结构性能评估和设计。利用非线性静力推覆分析的结果提出了几种方法。这些技术通常使用通过非弹性振子的NDA计算的最大响应，该非弹性振子“等效”于原始框架。在实际应用中，最好是通过一种简单的方法，如等效线性化技术和统一的危险谱来近似估计响应。在基于可靠度的结构抗震性能评估和设计中，需要考虑评估技术的准确性水平。本文提出了一种简单的方法，利用弹性振子r年重现期位移的单一均匀危险谱来估计抗弯钢框架层间位移角的r年重现期值。结构需求的估计使用的安全系数进行评估，考虑到地震危险的变化，准确性的技术估计结构响应，并考虑到结构性能水平。该技术的准确性进行了调查，相对于更直接地从地震危险的概率分布估计的结构需求。