English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

海岸護岸上に設置されていた透過性のある防波柵が背後地の被害軽減に役立ったと推測される事例が確認されているものの防波柵の津波浸水流の低減効果や減災機能の定量的な評価はされていない本研究では津波に対する防波柵の効果や津波波力の基本特性を明らかにするために護岸や柵の構造的条件や段波津波の条件を系統的に変化させた段波実験を行い柵衝突時の段波津波の挙動重複波高の増幅浸水深・流速及び波力の低減比率を調べたその結果柵の遮蔽率が一定の場合浸水流速の低減効果は相対的波高が小さい程高まるが浸水深や作用波力は重複波高が柵高の半分以上柵高以下の段波に対して低減効果が高まること不透過壁の波力と比べた防波柵の波力の減少量は柵面での遮蔽面積の減少分より大きく防波柵にかかる波力はかなり低減できる可能性があること等が分かったThe reduction of tsunami inundation flow and tsunami force by a porous vertical barrier installed on a seawall was investigated to give a better understanding of effects of coastal structures on tsunami hazard mitigation. Laboratory experiments of permeable and impermeable wave barriers exposed to breaking bore were carried out to examine variations in wave height amplifications, inundation flows and wave forces acting on barriers. It turns out that the porous barrier can reduce the inundation depth and discharge effectively. The reduction effects on the inundation depth and discharge are mainly governed by the porosity of barrier and the relative tsunami height to barrier height. The reduction of inundation velocity is less than that of inundation depth. When tsunami height in front of a porous barrier is between 0.5 and 1.0 with respect to barrier height, the wave force acting on the barrier can be significantly reduced in comparison with that of the impermeable barrier. This is because that the reduction of wave force is influenced by variations in tsunami height in front of the porous barrier

REDUCTION OF TSUNAMI INUNDATION FLOW AND TSUNAMI FORCE BY A POROUS VERTICAL BARRIER MOUNTED ON A SEAWALL