Modern concrete bridge deck analysis considering the effects of cracking

Abstract

This paper outlines a refinement to current grillage and linear finite element analysis methods to better estimate the behaviour of reinforced concrete deck slabs on prestressed beam or steel girder bridges, suitable for modern codes of practice and computerised methods. The work is part of research aimed at unlocking the potential of compressive membrane action. The paper proposes a three-phase approach for the prediction of cracking, deflections, ductility and load capacity. The method increases the accuracy of current grillage and conventional linear finite element methods by taking into account flexural cracking extensions using an effective strain method. The method gives better estimates of deflections at serviceability and allows for better estimates of the ultimate load capacity of existing bridges. This results in more economic reinforcement designs with lower carbon footprint for new bridges.

Intelligent feature extraction, data fusion and detection of concrete bridge cracks: current development and challenges

“…If cracks cannot be detected and maintained in a timely manner, traffic safety will gradually be affected, with the potential for bridge collapse and related accidents. Once bridge collapse occurs, it will reduce its structural bearing capacity, which will affect the reliability and safety of the structure, causing immense social repercussions [2][3][4] .…”