Wei, Qingyang and Shen, Lei and Dunai, László and Kövesdi, Balázs Géza and Elqudah, Sara and Cao, Maosen (2024) Quantitative evaluation on the effects of the spatial variability in concrete materials on seismic damage of concrete gravity dams. ENGINEERING FRACTURE MECHANICS, 307. No.-110287. ISSN 0013-7944
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Quantitativeevaluationontheeffectsofthespatialvariabilityinconcretematerialsonseismicdamageofconcretegravitydams.pdf - Published Version Restricted to Registered users only Available under License Creative Commons Attribution. Download (18MB) | Request a copy |
Abstract
The influencing mechanism of the spatial variability in concrete materials on the seismic damage of concrete gravity dams is still unclear, and existing methods for evaluating the seismic damage are insufficient. In this work, the effects of concrete’s spatial variability on the seismic damage distribution, energy dissipation, and deformation in concrete gravity dams are performed based on the damaged plastic model of concrete. Prior to the seismic damage analysis, the method for seismic inputting and the correlation function for realizing random fields of concrete materials are carefully determined. Based on the seismic damage analysis of the Koyna gravity dam, the tensile strength has the greatest influence on the seismic damage, followed by the elastic modulus and fracture energy. Aiming at the parameter of tensile strength, the decrease of correlation distance and the increase of the coefficient of variation increase the damage degree and complicate the damage distribution. A convenient and comprehensive damage profiling indicator is proposed to avoid the one-sidedness and evaluation error caused by using a single scalar damage value. The triangular area enclosed by the three individual damage indexes represents the comprehensive damage degree, and the shape change of the damage triangle indicates the change in the damage pattern of the dam. This damage profiling indicator is specifically designed to quantitatively distinguish and evaluate the damage degrees between a series of damage cases.
| Item Type: | Article |
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| Additional Information: | College of Mechanics and Engineering Science, Hohai University, Nanjing, China Department of Structural Engineering, Budapest University of Technology and Economics, Budapest, Hungary College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China Jiangxi Province Key Laboratory of Environmental Geotechnical Engineering and Hazards Control, Jiangxi University of Science and Technology, Ganzhou, China Export Date: 19 July 2024 CODEN: EFMEA Correspondence Address: Cao, M.Focheng West Road 8, China; email: cmszhy@hhu.edu.cn Funding details: BZ2022010, BZ2023011 Funding details: Fundamental Research Funds for the Central Universities, B220204002 Funding details: Fundamental Research Funds for the Central Universities Funding text 1: The authors are grateful for the Jiangsu International Joint Research and Development Program (No. BZ2022010), the Jiangsu-Czech Bilateral Co-Funding R&D Project (No. BZ2023011), and the Fundamental Research Funds for the Central Universities (No. B220204002). |
| Uncontrolled Keywords: | Gravity dams, Spatial variability, Random fields, Seismic input, Seismic damage |
| Subjects: | Q Science / természettudomány > QE Geology / földtudományok > QE03 Geodynamics / geodinamika T Technology / alkalmazott, műszaki tudományok > TA Engineering (General). Civil engineering (General) / általános mérnöki tudományok T Technology / alkalmazott, műszaki tudományok > TC Hydraulic engineering. Ocean engineering / vízépítés |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 03 Oct 2024 11:15 |
| Last Modified: | 03 Oct 2024 11:15 |
| URI: | https://real.mtak.hu/id/eprint/206788 |
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