Reproduction of spatial variability associated with material corrosion and its application to performance assessment of existing structures
| Project/Area Number |
16H04403
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
|
|---|
| Research Institution | Waseda University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
斉藤 成彦 山梨大学, 大学院総合研究部, 教授 (00324179)
高橋 良和 京都大学, 工学研究科, 教授 (10283623)
吉田 郁政 東京都市大学, 工学部, 教授 (60409373)
|
|---|
| Project Period (FY) |
2016-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2019)
|
| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2018: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
|
|---|
| Keywords | 鉄筋コンクリート / 維持管理 / 塩害 / 鉄筋腐食 / ガウス確率場 / ライフサイクル解析 / 確率場 / 空間変動 / 信頼性解析 / 材料劣化 / 非線形解析 / X線 / 有限要素解析 / ライフサイクル |
|---|
| Outline of Final Research Achievements |
In this study, the spatial variability associated with longitudinal rebar in reinforced concrete (RC) beam subjected to chloride attack is reproduced by Spectral Representation Method (SRM). The parameters used in SRM to represent the 1D random field are determined based on the previous experimental results of visualization of spatially distributed steel corrosion over RC beam by X-ray technology. Once the stochastic random field is defined, random variables are generated using Monte Carlo Simulation (MCS) and probabilistic density function (PDF) associated with flexural capacity of corroded RC beams could be estimated. Comparing with the experimental results of bending test of corroded RC beams in the literature, effectiveness of proposed method is demonstrated.
|
| Academic Significance and Societal Importance of the Research Achievements |
鉄筋腐食により鉄筋コンクリート構造物の安全性が供用期間の経過とともに低下します．この低下の様子を表現する際，既存研究では通常，鉄筋腐食はRC構造物内に一様に生じていると仮定しています．RC構造物内の場所に関係なく，全ての鉄筋が同じ腐食量を持つとの条件で，劣化RC構造物の耐荷力や塑性変形能が計算されているのです．実際には，様々な理由で，鉄筋の腐食量は構造物内の場所ごとに異なり，それは空間変動性を有する現象です．本研究では，これを計算機の中で再現するための手法を提案し，実験結果との比較から，手法の妥当性を示しています．
|
Report
(4 results)
Research Products
(72 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Journal Article] Performance indicators for structural systems and infrastructure networks2016
Author(s)
Ghosn, M., Dueñas-Osorio, L., Frangopol, D. M., McAllister, T. P., Bocchini. P., Manuel, L., Ellingwood, B, Arangio, S., Bontempi, F., Shah, M., Akiyama, M., Biondini, F., Hernandez, S., and Tsiatas, G.
-
Journal Title
Journal of Structural Engineering
Volume: In press
Issue: 9
DOI
Related Report
Peer Reviewed / Int'l Joint Research
-
-
-
[Journal Article] Ground motion estimation for the elevated bridges of the Kyushu Shinkansen derailment caused by the foreshock of the 2016 Kumamoto earthquake based on the site-effect substitution method2016
Author(s)
Hata, Y., Yabe, M., Kasai, A., Matsuzaki, H., Takahashi, Y. and Akiyama, M.
-
Journal Title
Earth, Planets and Space
Volume: In press
Issue: 1
DOI
NAID
Related Report
Peer Reviewed / Open Access
-
-
-
-
-
-
[Presentation] Effect of Different Steel Weight Loss Distributions on the Life-Cycle Reliability of PC Girders2018
Author(s)
Nishiya, N., Fukushima, H., Sakurai, A., Akiyama, M., Bocchini, P., Frangopol, D.M.
Organizer
Proceeding of the 9th International Conference on Bridge Maintenance, Safety and Management (IABMAS18)
Related Report
Int'l Joint Research
-
-
-
-
-
-
-
-
[Presentation] Bidirectional Shaking Table Test of Concrete Bridge Pier with Friction Pendulum Isolation System2017
Author(s)
Brito, B., Seto, T., Ichikawa, Y., Ishigaki, N., Suezaki, M., and Akiyama, M.
Organizer
Proceeding of the 15th East Asia-Pacific Conference on Structural Engineering & Construction (EASEC-15)
Related Report
Int'l Joint Research
-
-
-
[Presentation] Shaking Table Test of RC Columns with Sliding Pendulum System2017
Author(s)
Brito, B., Seto, T., Ichikawa, Y., Ishigaki, N., Suezaki, M., and Akiyama, M.
Organizer
Proceeding of the 8th Asia and Pacific Young Researchers and Graduates Symposium (YRGS2017)
Related Report
Int'l Joint Research
-
-
-
-
[Presentation] Probabilistic Tsunami Fragility Assessment Considering the Tsunami Pressure Fluctuations and Model Uncertainties2017
Author(s)
Nanami, K., Sthapit, S., Akiyama, M., Frangopol, D.M., Iwabuchi, Y., Sugino, H., and Koshimura, S.
Organizer
Proceeding of the 12th International Conference on Structural Safety & Reliability (ICOSSAR2017)
Related Report
Int'l Joint Research
-
-
-
-
-
-
-
-
-
-
[Book] 南海トラフ地震2019
Author(s)
秋山 充良、石橋 寛樹
Total Pages
152
Publisher
早稲田大学出版部
ISBN
9784657190017
Related Report
-
