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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Probabilistic collapse resistance and residual drift assessment of buildings with fluidic self-centering systems
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Probabilistic collapse resistance and residual drift assessment of buildings with fluidic self-centering systems

机译：具有流体自定心系统的建筑物的概率抗倒塌能力和残余漂移评估

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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 50years, and the mean annual frequency of exceeding the threshold residual story drift limits and the corresponding exceedance probability over 50years. 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 (c) 2016 John Wiley & Sons, Ltd.
机译：带有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性阻尼器技术的设备组成，但以对设备加压会产生预载的方式构建，该预载旨在减少或消除残留漂移。这些建筑物的设计遵循与ASCE 7中带有减震系统的结构设计并行的程序，但经过修改以包含预载效果。还按照ASCE 7设计了参考常规建筑，以进行比较。然后对这些建筑物进行分析，以检查和比较其抗地震倒塌的能力和残余漂移，其中将残余位移极限值设为楼层高度的0.2％，0.5％，1.0％和2.0％作为重要阈值。研究进一步计算了50年的平均年倒塌频率和相应的超标概率，以及50年来超过阈值剩余故事漂移极限的年均频率和相应的超标概率。考虑了增加位移能力或设备的阻尼或预载，不同类型的阻尼，自定心设备-支撑系统的极限强度增加以及框架强度增加等因素，从而改变了设计程序。已经发现，增加自定心装置-支撑系统的极限力能力或框架强度会导致抗塌陷性的显着提高，并使残余漂移最小化，而其他设计参数的变化则影响很小。版权所有（c）2016 John Wiley＆Sons，Ltd.

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