A new approach for estimating seismic damage of buried water supply pipelines
A new approach for estimating seismic damage of buried water supply pipelines
复制标题
估算埋地供水管道震害的新方法
DOI：
10.1002/eqe.2869
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发表时间：
2017
影响因子：
4.5
通讯作者：
Y. Kuwata
中科院分区：
文献类型：
--
作者：
H. Sakai;N. Pulido;K. Hasegawa;Y. Kuwata
传统的生命线结构损伤预测方法主要基于峰值地震动测量。然而，像生命线这样的线路结构受到的破坏主要是由地面的应变引起的，因此很可能容易受到地面运动的急剧空间变化的影响。本文提出了一种基于地表峰值速度（PGV）空间梯度的地下供水管道损伤评价方法，试图量化地表运动的地理空间变异性对管道损伤的影响。研究了2004年10月10日新潟中越地震（日本气象厅震级（MJMA）为6.8级）和1995年1月17日神户地震（MJMA7.3级）对输水管道造成的破坏的空间分布，并与震区周围PGV分布和计算的PGV梯度进行了比较。对于神户地震，我们使用了由Matsushima和Kawase进行的强运动模拟得到的PGV分布。以中越地震为例，我们使用基于多震源模型的基于宽带频率的强地震动模拟方法来估计地面运动。在这两种情况下，我们都计算了PGV沿地理坐标的梯度，并将PGV梯度矢量的幅值作为损伤估计量。研究结果表明，地下供水管道的损伤分布与PGV梯度的相关性大于与PGV本身的相关性。因此，PGV梯度是编制地下设施初始筛选危害图的有用指标。版权所有©2017 John Wiley & Sons， Ltd
Conventional damage prediction methods for lifeline structures are primarily based on peak ground motion measurements. However, line structures such as lifelines suffer damage that is mainly induced by the strain of the ground and therefore are likely to be vulnerable to sharp spatial changes in the ground motion. In this study, we propose a measure for evaluating the damage incurred by underground water supply pipelines based on the spatial gradient of the peak ground velocity (PGV), in an attempt to quantify the effects of the geospatial variabilities in the ground motion on pipeline damage. We investigated the spatial distribution of the damage caused to water pipelines during the Niigata‐ken Chuetsu earthquake on October 10, 2004 (Japan Meteorological Agency magnitude (MJMA) of 6.8) and the Kobe earthquake on January 17, 1995 (MJMA7.3) and compared the surveyed damage with the PGV distribution as well as with the gradients of the PGV calculated around the damage areas. For the Kobe earthquake, we used the PGV distribution obtained by the strong‐motion simulation performed by Matsushima and Kawase . In case of the Chuetsu earthquake, we estimated the ground motion using a broadband‐frequency‐based strong‐ground‐motion simulation method based on a multiasperity source model. In both cases, we calculated the gradients of the PGV along the geographical coordinates, with the amplitude of the PGV gradient vector being employed as the damage estimator. Our results show that the distribution of damage to underground water supply pipelines exhibits a greater correlation with the gradients of the PGV than with the PGV itself. Thus, the gradient of the PGV is a useful index for preparing initial‐screening hazard maps of underground facilities. Copyright © 2017 John Wiley & Sons, Ltd.
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DOI：
10.5610/jaee.6.11
发表时间：
2006
期刊：
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影响因子：
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DOI：
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发表时间：
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期刊：
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影响因子：
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DOI：
10.1002/j.1551-8833.2010.tb10111.x
发表时间：
2010
期刊：
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影响因子：
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DOI：
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发表时间：
1994
期刊：
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影响因子：
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DOI：
--
发表时间：
2006
期刊：
Third International Symposium on the Effects of Surface Geology on Seismic Motion, Grenoble, France 1
影响因子：
--
作者：
Pulido,N.;and M.Matsuoka
通讯作者：
and M.Matsuoka