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Near Source Fault Effects on the Performance of Base-Isolated Hospital Building vs. a BRBF Hospital Building

机译:近源断层对基础隔离式医院建筑与BRBF医院建筑性能的影响

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Analysis of the data from Northridge earthquake clearly demonstrated, that for sites close to fault rapture (i.e. sites located less than 15km from fault), the ground motion spectra was significantly higher than design spectrum used in the earlier code. The new four story Replacement Hospital -Phase 1 building for the Washington Hospital, Fremont, California, is located at a site which is less than 0.3 km from the Hayward fault. Due to the proximity of this critical care facility to the Hayward fault, this building can be subjected to significant acceleration from a major seismic event on this fault. The building's primary lateral load resisting system consists of Moment Frames in both directions. Base isolation was selected to meet the enhanced seismic performance objective required by the California Building Code for critical care facilities. Viscous dampers were added at the isolation level to control isolator displacement and to limit the moat size. Currently this building is under design and is expected to go into construction in 2010.rnThis paper presents the results of the non-linear response history analysis on the above building and in particular the performance of the building's non-structural systems with out the near source effects. Next, for the same building a Buckling Restrained Braced Frame (BRBF) system is used as the primary lateral load resisting system and a non-linear response history analysis is carried out. Finally, the results of the building performance using the two different lateral systems are presented. Actual floor acceleration values obtained from the non-linear response history analysis is used to study the effect of ground motions on the performance ofrnnon-structural elements of the building and is then compared with current code requirements for Immediate Occupancy and Life Safety performance criteria.
机译:对Northridge地震数​​据的分析清楚地表明,对于断层破裂附近的站点(即距断层不到15 km的站点),地震动谱显着高于早期规范中使用的设计谱。加利福尼亚弗里蒙特华盛顿医院的新四层置换医院-一期大楼位于距海沃德断层不到0.3公里的位置。由于该重症监护设施靠近海沃德断层,该建筑物可能会因该断层上的重大地震事件而承受明显的加速度。建筑物的主要侧向抗力系统由双向弯矩框架组成。选择基础隔离​​层是为了满足《加州建筑规范》对重症监护设施的要求,以提高抗震性能。在隔离级别添加了粘性阻尼器,以控制隔离器的位移并限制护城河的大小。目前,该建筑物正在设计中,预计将于2010年投入使用。rn本文介绍了上述建筑物的非线性响应历史分析结果,尤其是在没有源头的情况下该建筑物的非结构系统的性能。效果。接下来,对于同一建筑物,屈曲约束支撑框架(BRBF)系统被用作主要的横向载荷抵抗系统,并进行了非线性响应历史分析。最后,介绍了使用两种不同侧向系统的建筑性能结果。从非线性响应历史分析中获得的实际地板加速度值用于研究地面运动对建筑物非结构性元件性能的影响,然后将其与当前法规的即时占用和生命安全性能标准进行比较。

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