Stochastic chemo-physical-mechanical degradation analysis on hydrated cement under acidic environments |
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| Institution: | 1. Centre for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, the University of New South Wales, Sydney, NSW 2052, Australia;2. Centre for Built Infrastructure Research, School of Civil & Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia;1. School of Materials Engineering, Jiangsu University of Technology, Changzhou, Jiangsu Province 213001, China;2. Mechatronic Institute, Zhejiang Sci-Tech University, Hangzhou, Zhejiang Province 310018, China;3. School of Information, Zhejiang Sci-Tech University, Hangzhou, Zhejiang Province 310018, China;1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;2. Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China;1. College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou, 325035 China;2. College of Mechanical Vehicle Engineering, Taiyuan University of Technology, Taiyuan 030024, China;1. School of Environment and Architecture, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai 200093, China;2. Department of Civil and Environmental Engineering, National University of Singapore, Singapore;3. Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China;4. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | The accumulation of material degradation under contact with aggressive aqueous environments could lead to reduced structural reliability. In terms of hydrated cementitious materials, such interactions often result in the chemo-physical-mechanical (CPM) degradation, which represents a multiphysics process of high non-linearity and complexity. By further considering the inevitable uncertainties associated with both the materials and the serving conditions, solving such a process requires novel probabilistic approaches. This paper presents a stochastic chemo-physical-mechanical (SCPM) degradation analysis on the hydrated cement under acidic environment. The SCPM analysis consists of modelling the stochastic chemophysical degradation by finite element method, and assessing the mechanical deterioration through analytical micromechanics. The proposed modelling framework couples the conventional Monte Carlo Simulation with a novel support vector regression algorithm. The present method is able to not only address the detailed degradation mechanisms, but also ensure low computational costs for an accurate SCPM degradation assessment. |
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