A numerical algorithm for damage progression of reinforced concrete bridge piers during air temperature and solar radiation cycles

Reinforced concrete (RC) solid piers are unavoidably affected by air temperature changes and solar radiation during service life. Nevertheless, the deterioration of pier concrete with increased exposure age remains unclear. A novel thermal-mechanical numerical algorithm (finite element model) for ch...

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Veröffentlicht in:Engineering structures Jg. 319; S. 118876
Hauptverfasser: Zhang, Kai, Lei, Jinshan, Wang, Zhiyong, Yuan, Qiang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier Ltd 15.11.2024
Schlagworte:
Damage evolution
Elastoplastic behavior
Environment loading
Numerical algorithm
Reinforced concrete (RC) piers
Reinforced concrete (RC) piers
Elastoplastic behavior
Environment loading
Damage evolution
Numerical algorithm
ISSN:0141-0296
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Zusammenfassung:Reinforced concrete (RC) solid piers are unavoidably affected by air temperature changes and solar radiation during service life. Nevertheless, the deterioration of pier concrete with increased exposure age remains unclear. A novel thermal-mechanical numerical algorithm (finite element model) for characterizing the deterioration characteristics of RC structures under cyclic environmental loads has been suggested. The deterioration of RC pier concrete after 100 years of air temperature and solar radiation cycles is simulated. The numerical results demonstrate that tensile damage of pier concrete during air temperature and solar radiation cycles increases continuously with exposure age. After one year of exposure, the tensile damage value of pier surface concrete increased to 0.201 and further increased to 0.286 and 0.357 as the exposure age grew to 10 and 100 years. Pier concrete tensile damage can be mitigated by using surface short-wave absorption-reducing methods, controlling the thermal properties of concrete, and raising the concrete peak tensile strain. The proposed finite element framework and numerical solutions enable a viable simulation-based method for the analysis of bridge structural long-term deterioration behavior and design of the bridge engineering. •A numerical methodology has been suggested to study the damage behaviors of RC members under cyclic environment loading.•Temperature effects in RC piers induced by solar radiation can cause surface concrete to crack.•Several solutions were suggested for minimizing the long-term thermal damage of RC solid pier.
ISSN:0141-0296
DOI:10.1016/j.engstruct.2024.118876