Abstract A hypothetical seismic site is constructed for which the probability law of the seismic ground acceleration process X ( t ) is specified. Since the seismic hazard is known, the performance of the incremental dynamic analysis- (IDA) and multiple stripe analysis- (MSA) based fragilities, which are used extensively in Earthquake Engineering, can be assessed without ambiguity. It is shown that the IDA- and MSA-based fragilities are unsatisfactory for moderate and large seismic events, are sensitive to the particular parameters used for their construction, and may or may not improve with the sample size. Also, the usefulness of the optimization algorithms for selecting ground motions records is questionable.

中文翻译：

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地震易损性曲线是否脆弱？

摘要 构造了一个假设的地震场地，并给出了地震地面加速度过程X ( t ) 的概率规律。由于地震危险性是已知的，因此可以毫不含糊地评估在地震工程中广泛使用的基于增量动态分析 (IDA) 和多条带分析 (MSA) 的脆弱性的性能。结果表明，基于 IDA 和 MSA 的脆性对于中等和大型地震事件并不令人满意，对其构造所用的特定参数敏感，并且可能会或可能不会随着样本量的增加而改善。此外，用于选择地面运动记录的优化算法的有用性值得怀疑。