Probabilistic collapse resistance and residual drift assessment of buildings with fluidic self‐centering systems
Probabilistic collapse resistance and residual drift assessment of buildings with fluidic self‐centering systems
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DOI：
10.1002/eqe.2733
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发表时间：
2016-10
影响因子：
4.5
通讯作者：
Shoma Kitayama;M. Constantinou
中科院分区：
文献类型：
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作者：
Shoma Kitayama;M. Constantinou
采用流体自定心系统的三层和六层建筑物的抗震性能进行了概率评估。流体自定心系统由基于流体粘滞阻尼器技术的装置组成，但其构建方式是装置的加压导致预载荷，该预载荷被探索以减少或消除残余漂移。这些建筑物的设计遵循与ASCE 7中的阻尼系统结构设计相似的程序，但进行了修改，以包括预加载效应。参考传统建筑物也按照ASCE 7进行了设计，以进行比较。然后，这些建筑物进行了分析，检查和比较它们的抗震倒塌和残余位移，其中残余位移限值的0.2%，0.5%，1.0%和2.0%的层高被选为重要的阈值。进一步计算了50年来的年平均倒塌频率和相应的倒塌概率，以及50年来的年平均超过临界剩余层间位移限值的频率和相应的倒塌概率。通过考虑增加装置的位移能力或阻尼或预载荷、不同类型的阻尼、增加自定心装置-支撑系统的极限强度以及增加框架强度，考虑了设计程序的变化。研究发现，增加自定心装置-支撑系统的极限承载力或框架强度，可显著提高抗倒塌能力并使残余位移最小化，而其他设计参数的变化影响较小。版权所有© 2016约翰威利父子有限公司.
The seismic performance of three‐ and six‐story buildings with fluidic self‐centering system is probabilistically assessed. The fluidic self‐centering systems consist of devices that are based on the technology of fluid viscous dampers but built in a way that pressurization of the devices results in preload that is explored to reduce or eliminate residual drift. The design of these buildings followed a procedure that parallels the design for structures with damping systems in ASCE 7 but modified to include the preload effect. Reference conventional buildings were also designed per ASCE 7 for comparison. These buildings were then analyzed to examine and compare their seismic collapse resistance and residual drift, where the residual drift limits of 0.2, 0.5, 1.0 and 2.0% of story height were selected as important thresholds. The study further calculated the mean annual frequency of collapse and corresponding exceedance probability over 50 years, and the mean annual frequency of exceeding the threshold residual story drift limits and the corresponding exceedance probability over 50 years. Variations in the design procedures by considering increased displacement capacity or damping or preload of the devices, different types of damping, increased ultimate strength of the self‐centering device–brace systems and increased frame strength were considered. It was found that increasing either the ultimate force capacity of the self‐centering device–brace system or the frame strength results in important improvements in the collapse resistance and in minimizing residual drift, whereas the variation of other design parameters has minor effects. Copyright © 2016 John Wiley & Sons, Ltd.