Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set
The dynamic characteristics of concrete are the key point of the dam seismic safety design. In order to study the dynamic characteristics of concrete, a CT scan test of concrete under dynamic load was carried out; CT scan images of the concrete loading process were obtained. Based on the definition...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/8169926 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832549649656840192 |
|---|---|
| author | Fang Jianyin Liu Ke Dang Faning Li Shutian |
| author_facet | Fang Jianyin Liu Ke Dang Faning Li Shutian |
| author_sort | Fang Jianyin |
| collection | DOAJ |
| description | The dynamic characteristics of concrete are the key point of the dam seismic safety design. In order to study the dynamic characteristics of concrete, a CT scan test of concrete under dynamic load was carried out; CT scan images of the concrete loading process were obtained. Based on the definition of integrity, integrity area, and intercepted sections in the quantitative zoning theory, the concrete CT images were divided into the hole or crack area (P0−λ1), hardened cement stone area (Pλ1−λ2), and aggregate area (Pλ2−1). And the determination method of partition threshold is studied. Then, based on the CT resolution unit, a concrete numerical calculation model of structural random is established, and the numerical simulation experiment of concrete under uniaxial dynamic load is carried out. The results show that the concrete numerical calculation model of structural random is very close to the actual mesostructure of concrete, and the interface thickness between aggregate and hardened cement is very close to the actual interface thickness (which is 40~50 μm). Under the action of dynamic load, the damage of the sample is mainly concentrated in the upper part of the sample, and the damage is easy to occur at the initial defect place, and the damage occurs at multiple points at the same time. The damage crack is relatively straight, the phenomenon of the crack passing through the aggregate is obvious, and the crack expands along the fastest path of energy release. |
| format | Article |
| id | doaj-art-4e9a722596c24072bed9c7ff4e0beafb |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-4e9a722596c24072bed9c7ff4e0beafb2025-02-03T06:10:46ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/81699268169926Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy SetFang Jianyin0Liu Ke1Dang Faning2Li Shutian3Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaThe dynamic characteristics of concrete are the key point of the dam seismic safety design. In order to study the dynamic characteristics of concrete, a CT scan test of concrete under dynamic load was carried out; CT scan images of the concrete loading process were obtained. Based on the definition of integrity, integrity area, and intercepted sections in the quantitative zoning theory, the concrete CT images were divided into the hole or crack area (P0−λ1), hardened cement stone area (Pλ1−λ2), and aggregate area (Pλ2−1). And the determination method of partition threshold is studied. Then, based on the CT resolution unit, a concrete numerical calculation model of structural random is established, and the numerical simulation experiment of concrete under uniaxial dynamic load is carried out. The results show that the concrete numerical calculation model of structural random is very close to the actual mesostructure of concrete, and the interface thickness between aggregate and hardened cement is very close to the actual interface thickness (which is 40~50 μm). Under the action of dynamic load, the damage of the sample is mainly concentrated in the upper part of the sample, and the damage is easy to occur at the initial defect place, and the damage occurs at multiple points at the same time. The damage crack is relatively straight, the phenomenon of the crack passing through the aggregate is obvious, and the crack expands along the fastest path of energy release.http://dx.doi.org/10.1155/2021/8169926 |
| spellingShingle | Fang Jianyin Liu Ke Dang Faning Li Shutian Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set Geofluids |
| title | Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set |
| title_full | Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set |
| title_fullStr | Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set |
| title_full_unstemmed | Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set |
| title_short | Numerical Simulation of Dynamic Characteristics of Dam Concrete Based on Fuzzy Set |
| title_sort | numerical simulation of dynamic characteristics of dam concrete based on fuzzy set |
| url | http://dx.doi.org/10.1155/2021/8169926 |
| work_keys_str_mv | AT fangjianyin numericalsimulationofdynamiccharacteristicsofdamconcretebasedonfuzzyset AT liuke numericalsimulationofdynamiccharacteristicsofdamconcretebasedonfuzzyset AT dangfaning numericalsimulationofdynamiccharacteristicsofdamconcretebasedonfuzzyset AT lishutian numericalsimulationofdynamiccharacteristicsofdamconcretebasedonfuzzyset |