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- Title
Numerical Analysis of Diaphragm Fatigue of Reinforced Concrete Simply Supported T-beams.
- Authors
Chunli Zhang; Peng Duan; Binshuang Zheng; Mingzhen Li
- Abstract
Diaphragms are important components of reinforced concrete ribbed beam bridges. Thus, diaphragm fatigue damage can seriously threaten the safety of in-service reinforced concrete ribbed beam bridges. In order to explore the fatigue performance of reinforced concrete beams and determine the internal relations between diaphragm fatigue life and fatigue load stress level, an entity analysis model of reinforced concrete simply supported T-beams was presented in this study. The spatial entity model was established by using the finite element software Midas/FEA. The correlation was analyzed on the basis of fatigue stress level, spacing-span ratio, width-height ratio, and fatigue performance of the beam diaphragms. The reliability of the calculation results was verified by using the traditional fatigue analytical methods of S-N curve and Miner linear cumulative damage theory and the methods for Goodman and Gerber correction. Results demonstrate that the fatigue life of the model beam increases and the damage degree decreases when the spacing-span ratio decreases and the width-height ratio increases. The model is economically reasonable when the diaphragm spacing-span ratio and the width-height ratio are 3.58 and 0.17, respectively. The study can provide references for further improving the anti-fatigue design of reinforced concrete diaphragm beams.
- Subjects
DIAPHRAGMS (Structural engineering); REINFORCED concrete; CONCRETE beam fatigue; CONCRETE beams; FATIGUE life; STRAINS &; stresses (Mechanics); DAMAGING stresses (Mechanics)
- Publication
Journal of Engineering Science & Technology Review, 2018, Vol 11, Issue 5, p193
- ISSN
1791-2377
- Publication type
Article
- DOI
10.25103/jestr.115.25