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.
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Acknowledgments
The described experiments were performed in cooperation with the Slovenian National Building and Civil Engineering Institute (ZAG). The work was partly funded by the Company for Motorways in the Republic of Slovenia (DARS). The CFRP jacketing was provided by SIKA d.o.o., Slovenia. The research was also supported by the Ministry of Higher Education, Science and Technology of the Republic of Slovenia. Some of the presented results were obtained within the scope of work performed for the preparation of Ph.D. theses by Jaka Zevnik and Zlatko Vidrih.
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Isaković, T., Fischinger, M. (2014). Inelastic Shear Response and Strengthening of RC Bridge Hollow Box Piers. In: Fischinger, M. (eds) Performance-Based Seismic Engineering: Vision for an Earthquake Resilient Society. Geotechnical, Geological and Earthquake Engineering, vol 32. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-8875-5_6
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DOI: https://doi.org/10.1007/978-94-017-8875-5_6
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