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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Quantifying the effects of long-duration earthquake ground motions on the financial losses of steel moment resisting frame buildings of varying design risk category
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Quantifying the effects of long-duration earthquake ground motions on the financial losses of steel moment resisting frame buildings of varying design risk category

机译：量化长期地震地面运动对不同设计风险类别钢矩抵抗框架建筑物的金融损失的影响

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摘要

This paper investigates the effect of ground motion duration on risks to life safety and costs associated with low-to-medium-rise reference steel moment resisting frame buildings classified as risk categories II and IV. The ductile steel resisting frame buildings are designed in the downtown area of Seattle, Washington, where long-duration earthquakes are more likely to occur. For this purpose, two sets of spectrally equivalent long- and short-duration ground motions are employed to perform nonlinear dynamic analyses for two-dimensional nonlinear structural models of the steel frame buildings. It is shown that the consideration of the effects of long-duration ground motion significantly increases the collapse risk of the steel frame buildings, by a factor of about 5 on average, in comparison to the short-duration set. The destabilizing P-Delta effects are found to increasingly aggravate the influence of long-duration earthquakes on the risk to life safety of the medium-rise steel frame buildings. For frequently occurring ground motion intensities, reparable damage to nonstructural components holds most of the total expected economic seismic loss in the reference buildings, regardless of the ground motion set and assigned risk category. The influence of ground motion duration on the economic seismic loss in the steel frame buildings starts to become important for strong ground motions associated with design-level earthquakes or higher.
机译：本文调查了地面运动持续时间对生命安全风险的影响，以及与低对中上升参考钢矩抵抗框架建筑物相关的成本归类为风险类别II和IV。塑料钢抵抗框架建筑是在华盛顿西雅图市中心的地区设计的，其中更有可能发生长期地震。为此目的，采用两组光谱等同的长持续时间接地运动来对钢框架建筑物的二维非线性结构模型进行非线性动态分析。结果表明，与短持续时间集相比，考虑了长持续时间接地运动的影响显着提高了钢框架建筑物的塌陷风险，其平均值约为5。发现稳定的p-Δ效应越来越加剧了长期地震对中升钢框架建筑物的生命安全风险的影响。对于经常发生的地面运动强度，无论地面运动集和分配的风险类别如何，对非结构组件的可抵抗损坏都占据了参考建筑物中的大部分预期经济地震损失。地面运动持续时间对钢框架建筑物经济地震损失的影响开始对与设计级地震或更高的强大地面运动变得重要。

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