2024-03-29T11:47:45Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00016799
2023-01-16T04:04:48Z
320:321:322
SIMPLIFIED EVALUATION OF COMPRESSIVE STRENGTH OF CORRODED STEEL PLATES
腐食鋼板の圧縮強度の簡易評価法に関する検討
杉浦, 邦征
49876
田村, 功
49877
渡邊, 英一
49878
伊藤, 義人
49879
藤井, 堅
49880
野上, 邦栄
49881
永田, 和寿
49882
SUGIURA, Kunitomo
49883
TAMURA, Isao
49884
WATANABE, Eiichi
49885
ITOH, Yoshito
49886
FUJII, Katashi
49887
NOGAMI, Kuniei
49888
NAGATA, Kazutoshi
49889
corroded steel plate
compression
residual strength
effective plate thickness
正弦波で単純モデル化した仮想的腐食形状および実腐食形状を有する周辺単純支持の鋼板に対する数値シミュレーションにより,様々な腐食形状が残存圧縮性能に与える影響について検討した.その結果,腐食鋼板の圧縮強度は断面積の減少により著しく低下すること,応力伝達軸方向のみならずその直交方向の板厚分布も耐荷力に大きく影響することが明らかとなった.数値シミュレーション結果に基づき,応力伝達軸方向,およびその直交方向の板厚分布を考慮して,任意の腐食性状を有する鋼板の実用的な圧縮強度推定法を提案した.一方,腐食に伴う減厚による板厚中心の偏心の影響について検討を行ったが,今回用いた板厚分布においては最大で10%程度の耐荷力変動であり,種々の耐荷力評価式による推定値のばらつきの範囲であり,大きく影響しないことがわかった.
The necessity of assessing the durability of structures such as bridges and offshore structures has arisen recently. It is obvious that the maintenance of infrastructures has become a key issue to assure the desired performance in operational condition and to prolong the life of structures. As for the life cycle performance of the steel elements in the marine atmosphere, in particular, the damage due to corrosion is important rather than that by fatigue. Investigated herein is the effect of the surface profile of corroded steel plates on the compressive strength by the elasto-plactic finite displacement analysis, by using the ficticious surface profile as well as the surface profile measured for the corroded steel pipes subjected to the corrosion exposure in the field under severer marine environment for about 20 years. The simple strength evaluation is proposed by considering the plate thickness variation in the smallest cross section.
journal article
土木学会
2007-01-19
application/pdf
土木学会論文集A
1
63
43
55
http://dx.doi.org/10.2208/jsceja.63.43
http://hdl.handle.net/2237/18828
1880-6023
https://nagoya.repo.nii.ac.jp/record/16799/files/A-128.pdf
jpn
https://doi.org/10.2208/jsceja.63.43