Research on a Damage Assessment Method for Concrete Components Based on Material Damage
With the popularization of the concept of seismic performance-based design, the correct and quantitative evaluation of post-earthquake damage to structural components has become a research focus. Referring to the concrete constitutive relationship mentioned in the Chinese national standard GB/T 5001...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
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| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/15/11/1844 |
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| Summary: | With the popularization of the concept of seismic performance-based design, the correct and quantitative evaluation of post-earthquake damage to structural components has become a research focus. Referring to the concrete constitutive relationship mentioned in the Chinese national standard GB/T 50010-2010, this study proposes a damage assessment method for concrete components based on material damage. According to the value of the uniaxial damage evolution parameter of concrete (<i>d</i><sub>c(t)</sub>), the damage grades of concrete components are defined. It is specified that, when the value of <i>d</i><sub>c(t)</sub> is less than the <i>d</i><sub>c(t),r</sub> value corresponding to the peak concrete strain (<i>ε</i><sub>c(t),r</sub>), the concrete component is in a non-damaged state (Level L1). When the value of <i>d</i><sub>c(t)</sub> is greater than the <i>d</i><sub>c(t)u</sub> value corresponding to the concrete strain (<i>ε</i><sub>c(t)u</sub>), the concrete component is in a severely damaged state (Level L6). When the value of <i>d</i><sub>c(t)</sub> is between these two values, the damage grade of the concrete component (levels L2 to L5) is determined using linear interpolation. To promote its engineering application, this study also proposes a quantitative expression for the damage assessment method for concrete components based on <i>d</i><sub>c(t)</sub>. To verify the rationality of the damage assessment method for concrete components based on <i>d</i><sub>c(t)</sub>, a refined model of rectangular, T-shaped, and L-shaped concrete shear wall components was established using ABAQUS software, and a nonlinear finite element analysis was carried out. The simulation results show that (a) the damage assessment method for concrete components based on <i>d</i><sub>c(t)</sub> can better characterize damage to concrete shear wall components; (b) when defining the damage grades of concrete shear wall components, using <i>d</i><sub>c</sub> is more reasonable than using <i>d</i><sub>t</sub>; and (c), from a macroscopic perspective, the damage assessment method for concrete components based on <i>d</i><sub>c(t)</sub> is more in line with actual expectations and has a higher safety factor compared with the damage assessment method for concrete components based on the concrete compressive strain (<i>ε</i><sub>c</sub>) mentioned in the Chinese association standard T/CECA 20024-2022. |
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| ISSN: | 2075-5309 |