Seismic fragility analysis of structures such as bridges must consider not only the uncertainties in the loads to which the structure is subjected, but also the uncertainties in the physical properties of the structure due to deterioration and other …
System fragility is required especially for the vulnerability assessment of existing bridges that configure transportation network as a structural system. Here, it is essential to consider not only variation of input ground motions but also the …
Real-time simulation of structures and structural members enables intuitive and immediate understanding of displacements and stresses, contributing to efficient decision making in design and maintenance. In this study, real-time simulation of …
The particle method does not require any computational grid and is an effective numerical method for simulating behaviors of the continuum mechanics. However, the computational cost is the issue to apply it to more complex physics or to the Monte …
Bridge systems have many components, and their fragility assessment must consider high-dimensional uncertainties. This study constructed a deep kernel learning (DKL) surrogate model to reduce the computational cost of fragility analysis of bridge …
本研究では、地震リスク解析の計算コストを削減するために、深層カーネル学習による代替モデルを開発した。このモデルは、畳み込みニューラルネットワーク（CNN）を用いて地震荷重の特徴を抽出する。さらに、Gradient-weighted Class Activation Mapping（Grad-CAM）により地震荷重の各部の寄与を推定し、ARDにより各構造パラメータの寄与を推定することで、代替モデルの説明可能性を高める。検証では、免震RC橋脚の地震応答解析のために代替モデルを構築した。その結果、代替 …
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