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Optimal values of seismic design coefficients considering variations of indirect economic losses

机译：考虑间接经济损失变化的抗震设计系数的最优值

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In order to attain optimum design values in the optimization process, it is necessary to have both initial cost functions and losses due to earthquakes. These costs are described in terms of design parameters, usually the seismic design coefficient or the vibration period. Among the losses caused by earthquakes, there are indirect economic losses called intangibles which may involve human lives. Here we compute a lower limit to the social value of an anonymous life, in the sense of how much society is willing to invest in order to preserve a human life. The human capital point of view is adopted, and it is assumed that the value of human life would be the expected present value of the income that a person would have earned in the event that he/she had lived. Then we resort to the classical reliability theory and use concepts such as probability of failure, reliability function, hazard function, and their relationships. In order to explore the influence of intangibles, optimum design coefficients are computed for a specific site considering that earthquake arrival times constitute a Poisson process. The results show that the influence of indirect economic losses in the computation of seismic design coefficients does make a difference and should not be ignored or assigned arbitrarily.
机译：为了在优化过程中获得最佳设计值，既要具有初始成本函数，又要有地震造成的损失。这些成本是根据设计参数（通常是抗震设计系数或振动周期）描述的。在地震造成的损失中，有间接的经济损失，称为无形资产，可能涉及人类生命。在这里，我们从社会愿意为维持人类生命而愿意投资多少的角度出发，计算匿名生活的社会价值的下限。采纳了人力资本的观点，并假设人类生命的价值将是一个人在生活中所应获得的收入的预期现值。然后，我们诉诸经典的可靠性理论，并使用诸如失效概率，可靠性函数，危险函数及其关系之类的概念。为了探讨无形资产的影响，考虑到地震到达时间构成了泊松过程，因此针对特定地点计算了最佳设计系数。结果表明，间接经济损失对抗震设计系数计算的影响确实有所不同，不应忽略或任意分配。

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