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Simplified estimation of the expected annual loss of reinforced concrete buildings

机译：钢筋混凝土建筑物预期年损失的简化估算

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Performance-based earthquake engineering procedures have now developed to the point that it is possible to evaluate a range of possible decision variables, including the expected annual monetary loss (EAL). Quantification of the EAL is considered to be particularly useful because it could assist with the identification of effective design and retrofit measures that consider seismic performance over a range of intensity levels. Recognizing, however, that existing procedures for the evaluation of EAL tends to be quite time consuming, this paper builds on a recent proposal to use simplified limit state loss versus intensity relationships to compute EAL via a closed-form equation, without the need to compile an inventory of damageable components and with freedom in the choice of structural analysis method. Various developments to the simplified approach are made in this paper to allow consideration of loss thresholds, non-uniform damage distributions and the impact of differences in seismic performance in orthogonal directions. In addition, means of accounting for uncertainties in the simplified EAL assessment are described. The work has focused on the assessment of EAL for reinforced concrete frame buildings with details representative of construction practice adopted in Italy in the 1950s through to the early 1970s. By comparing loss assessment results obtained using a refined methodology with those obtained using the new guidelines developed here for two case study buildings, it is concluded that the simplified approach works well. Future research should therefore aim to further validate the approach and extend it to other building typologies and construction eras. Copyright (c) 2017 John Wiley & Sons, Ltd.
机译：基于性能的地震工程程序现已发展到可以评估一系列可能的决策变量的程度，包括预期的年度金钱损失（EAL）。 EAL的量化被认为特别有用，因为它可以帮助确定有效的设计和改造措施，这些措施应考虑在一定强度范围内的抗震性能。但是，由于认识到现有的EAL评估程序往往很耗时，因此本文基于最近的建议，即使用简化的极限状态损耗与强度关系通过闭式方程式来计算EAL，易损组件的清单，并且可以自由选择结构分析方法。本文对简化方法进行了各种开发，以考虑损失阈值，非均匀损伤分布以及正交方向上地震性能差异的影响。此外，还介绍了在简化的EAL评估中考虑不确定性的方法。这项工作的重点是对钢筋混凝土框架建筑的EAL进行评估，其细节代表了1950年代至1970年代初期在意大利采用的建筑实践。通过将使用改进的方法获得的损失评估结果与使用此处针对两个案例研究建筑物制定的新准则获得的损失评估结果进行比较，可以得出结论，简化方法效果很好。因此，未来的研究应旨在进一步验证该方法，并将其扩展到其他建筑类型和建筑时代。版权所有（c）2017 John Wiley＆Sons，Ltd.

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