FEA of Deck Corner Cracking on Skewed Bridge Structures
Based on a nationwide survey and deck inspection in Michigan, the phenomenon of more severe corner cracking on skewed bridge decks was commonly observed. A series of FEA by DIANA were carried out to identify the possible causes and viable cures for such cracking. Prior to the FEA, the accuracy of FEM modeling was calibrated by two skew bridge decks instrumented using temperature and strain sensors for the deck concrete and the ambient environment. Test and FEA results found that the cracking has been mainly caused by thermal and shrinkage stress, and that possibly propagated and worsened by repetitive truck wheel loading. According to current Michigan practice of skew deck design and construction, additional reinforcement in the corner areas is therefore recommended to reduce concrete stresses. Further research is also recommended to develop solutions using optimal combinations of ingredients in concrete and to minimize the constraint between the deck and the supporting superstructure.
Y. Z. Zhuang et al., "FEA of Deck Corner Cracking on Skewed Bridge Structures", Advanced Materials Research, Vols. 255-260, pp. 1240-1243, 2011