In Situ Experimental Study on the Behavior of UHPC Composite Orthotropic Steel Bridge Deck

Materials

Yan Gao¹  Jianlei Liu¹  Li Su¹  Shilei Wang¹  Xudong Shao² 

[1] China Academy of Railway Sciences Corp. Ltd., Beijing 100081, China;Department of Bridge Engineering, Hunan University, Changsha 410082, China;

关键词: orthotropic steel deck;    uhpc;    hot spot stress;    in situ experiment;   

DOI  :  10.3390/ma13010253

来源: DOAJ

【 摘 要 】

A novel ultra high performance concrete (UHPC) layer composite orthotropic steel deck was adopted in the construction of a new bridge in China to improve the fatigue performance of the orthotropic steel deck plate and reduce the disease of surface wearing layer. In situ experiments were conducted to study the UHPC layer’s impact on the behavior of the orthotropic steel deck. The test vehicle loads were applied on the deck plate before and after UHPC layer paving, the stresses where fatigue cracks usually occur and the deflections of critical sections were measured. The test results verified that the UHPC composite steel deck system could significantly reduce the stress of the rib-to-deck connection region and the stress at the bottom toe of rib-to-diaphragm weld. In addition, it slightly influenced the performance of U shape rib, girder web-to-deck and diaphragm cutout.

【 授权许可】

Unknown