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首页> 外文期刊>Bulletin of earthquake engineering >Lessons for loss assessment from the Canterbury earthquakes: a 22-storey building
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Lessons for loss assessment from the Canterbury earthquakes: a 22-storey building

机译：坎特伯雷地震的损失评估课程：一幢22层楼的建筑

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By comparing damage and loss predictions with those observed for a 22-storey steel building with eccentrically based frames (EBF) that underwent the Canterbury earthquakes, this paper gauges the performance and explores the benefits of applying the PEER performance-based earthquake engineering assessment procedure. The study shows that steel EBF repair costs are significantly affected by the work required to remove and reinstate non-structural elements in order to access the steel structure. It is therefore concluded that the location of non-structural elements relative to structural elements should be considered in the seismic design of new buildings and within loss assessment procedures. Two retrofit and/or rehabilitation options are considered for the building; improving the deformation capacity of drywall partitions, and re-detailing the exterior cladding connections to better accommodate structural deformations. The findings show that, for the specific building, improving the drywall partitions should lead to a reduction in expected annual losses whereas the use of improved detailing for the precast concrete cladding would not. This suggests a general strategy for cost-effective decisions might be to focus on increasing the performance of the most vulnerable components (plasterboard partition walls, in this case). An examination of the potential effects of aftershocks to the selection of cost-effective options adds support to this conclusion. Aftershocks are found to increase the predicted losses by around 10%, emphasizing the need to consider aftershocks when assessing expected annual losses due to earthquakes.
机译：通过比较坎特伯雷地震中22层偏心框架钢结构建筑（EBF）的损伤和损失预测，本文评估了性能，并探讨了应用基于同行性能的地震工程评估程序的好处。研究表明，为了接近钢结构，拆除和恢复非结构构件所需的工作对钢EBF维修成本有显著影响。因此得出结论，在新建筑的抗震设计和损失评估程序中，应考虑非结构构件相对于结构构件的位置。该建筑考虑了两种改造和/或修复方案；提高干式墙隔墙的变形能力，并重新设计外部覆层连接，以更好地适应结构变形。研究结果表明，对于特定的建筑，改进干式墙隔墙应能减少预期的年度损失，而对预制混凝土覆层采用改进的细部设计则不会。这表明，成本效益决策的一般策略可能是专注于提高最脆弱组件（本例中为石膏板隔墙）的性能。对余震对成本效益方案选择的潜在影响的研究为这一结论提供了支持。发现余震增加了约10%的预测损失，强调在评估地震造成的预期年度损失时需要考虑余震。

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