Techno Press
Techno Press

Computers and Concrete   Volume 19, Number 1, January 2017, pages 087-98
DOI: http://dx.doi.org/10.12989/cac.2017.19.1.087
 
Crashworthiness analysis on existing RC parapets rehabilitated with UHPCC
Jinkai Qiu, Xiang-guo Wu and Qiong Hu

 
Abstract     [Full Text]
    In recent year, the coat layer drops and the rebar rust of bridge parapets, which caused the structural performance degradation. In order to achieve the comprehensive rehabilitation, ultra high performance cementitious composites is proposed to existing RC parapet rehabilitation. The influence factors of UHPCC rehabilitation includes two parts, i.e., internal factors related with material, such as UHPCC layer thickness, corrosion ratio of rebars, fiber volume fraction, and external factors related with the load, such as impact speeds, impact angles, vehicle mass. The influence of the factors was analyzed in this paper based on the nonlinear finite element. The analysis results of the maximum dynamic deformation and the peak impact load of parapets revealed the influence of the internal factors and the external factors on anti-collision performance and degree degradation. This research may provide a reference for the comprehensive multifunctional rehabilitation of existing bridge parapets.
 
Key Words
    parapets; rehabilitation; UHPCC; impact load; deformation
 
Address
Jinkai Qiu, Xiang-guo Wu and Qiong Hu:
1) Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,
Harbin Institute of Technology, Harbin, 150090, China
2) School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
 

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