Abstract:Abstract:After the Tohoku earthquake in 2011, we observed that aftershocks tended to occur in a wide region after such a large earthquake. These aftershocks resulted in secondary damage or delayed rescue and recovery activities. In addition, it has been reported that there are regions where the intensity of the vibrations owing to the aftershocks was much stronger than those associated with the main shock. Therefore, it is necessary to consider the seismic risk associated with aftershocks. We used the data reg… Show more
“…However, measuring local soil amplification requires many sensors and is therefore expensive. Hence, many methods have been proposed to estimate earthquake hazard empirically or statistically (e.g., [5][6][7][8]), and use them as inputs for repair rate curves for estimating pipeline damage. These methods are often used to estimate the seismic damage done to pipeline networks for water distribution [1][2][3].…”
Abstract:A soil-amplification analysis method is developed that uses high-resolution ground data and a three-dimensional nonlinear dynamic finite-element method to screen for possible areas of seismic damage to buried water-distribution pipeline networks. The method is applied to a cut-and-fill developed area in Japan, whose water-distribution pipeline network was severely damaged in the 2011 off the Pacific Coast of Tohoku Earthquake. The obtained soil amplification is compared with known points of pipeline damage to check the validity of the analysis. A sensitivity test is also conducted to account for uncertainties in the properties of the ground material. From the results, it is expected that the developed soil-amplification method could be used to screen for possible damage to buried pipelines in a given area, and used to support methods for estimating damage to buried pipelines based on observations and seismic indices.
“…However, measuring local soil amplification requires many sensors and is therefore expensive. Hence, many methods have been proposed to estimate earthquake hazard empirically or statistically (e.g., [5][6][7][8]), and use them as inputs for repair rate curves for estimating pipeline damage. These methods are often used to estimate the seismic damage done to pipeline networks for water distribution [1][2][3].…”
Abstract:A soil-amplification analysis method is developed that uses high-resolution ground data and a three-dimensional nonlinear dynamic finite-element method to screen for possible areas of seismic damage to buried water-distribution pipeline networks. The method is applied to a cut-and-fill developed area in Japan, whose water-distribution pipeline network was severely damaged in the 2011 off the Pacific Coast of Tohoku Earthquake. The obtained soil amplification is compared with known points of pipeline damage to check the validity of the analysis. A sensitivity test is also conducted to account for uncertainties in the properties of the ground material. From the results, it is expected that the developed soil-amplification method could be used to screen for possible damage to buried pipelines in a given area, and used to support methods for estimating damage to buried pipelines based on observations and seismic indices.
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