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Published in:
2014 | OriginalPaper | Chapter
6. Inelastic Shear Response and Strengthening of RC Bridge Hollow Box Piers
Authors : Tatjana Isaković, Matej Fischinger
Published in: Performance-Based Seismic Engineering: Vision for an Earthquake Resilient Society
Publisher: Springer Netherlands
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Abstract
Several existing bridges located in Central Europe (in Slovenia) are supported by hollow box columns whose structural detailing is inadequate, by today’s standards, for seismic regions. This chapter includes an overview of experimental and analytical studies of such columns. During the experiments, shear failure of the investigated columns was observed. For this reason it was necessary to increase their shear strength. Two techniques were analysed and compared: RC jacketing and CFRP wrapping. In both cases the minimum amount of strengthening effectively increased the shear strength. Although shear failure was prevented, other unfavourable failure types, induced by other deficiencies in the structural detailing, were activated. The analytical estimation of the shear strength and cyclic response of the as-built and the strengthened columns was quite challenging since the disagreement between different available methodologies was considerable. The most successful analytical procedures were identified.