- Cyclic testing and comparison of locally CFRP confined HSS braces and buckling-restrained braces
- O. Celik ; C Avci-Karatas ; C. Haydaroglu
- Book Title / Journal: 2nd European Conference on Earthquake Engineering and Seismology, Istanbul, Turkey
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
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- Seismic retrofit of single story precast reinforced concrete structures with infill walls using friction dampers
- I. Mualla ; Y. Tonguc ; B. Erkus ; G. Asik ; S. Yildirim
- Book Title / Journal: 2nd European Conference on Earthquake Engineering and Seismology, Istanbul, Turkey
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
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- An experimental investigation on the ultimate strength of epoxy-repaired braced partial infilled RC frames
- S.K.D. Dubey ; S. Kute
- Book Title / Journal: International Journal of Advanced Structural Engineering
- Year: 2014 , Volume: 6 , Series:
- Repair and Retrofit of Structures
- Keywords: Central braced frame ; Epoxy resin ; Lateral load ; Soft storey ; Retrofitted frame
- Description
- Due to earthquake, buildings are damaged partially or completely. Particularly, structures with soft storey are mostly affected. In general, such damaged structures are repaired and reused. In this regard, an experimental investigation was planned and conducted on models of single bay, single storey of partial concrete infilled reinforced concrete (RC) frames up to collapse with corner, central, and diagonal steel bracings. Such collapsed frames were repaired with epoxy resin and retested. The initiative was to identify the behavior, extent of restored ultimate strength, and deflection of epoxy-retrofitted frames in comparison with the braced RC frames. The performance of such frames has been considered only for lateral loads. In comparison with bare RC frames, epoxy-repaired partial infilled frames have significant increase in lateral load capacity. Central bracing is more effective than corner and diagonal bracing. For the same load, epoxy-repaired frames have comparable deflection than similar braced frames.
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- Comparative shaking-table tests of various upgrade systems applied on existing two-storey RC structures with and without masonry infill - preliminary results
- M. Garevski ; B. Dujic ; J. JanÄar ; V. Hristovski
- Book Title / Journal: 2nd European Conference on Earthquake Engineering and Seismology, Istanbul, Turkey
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
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- Rehabilitation of earthquake damaged external RC beam-column joints
- J. Shafaei ; A. Hosseini ; M.S. Marefat ; J.M. Ingham
- Book Title / Journal: New Zealand Society for Earthquake Engineering (NZSEE) Annual Technical Conference
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: RC buildings ; Earthquake ; beam-column joints ; Seismic performance
- Description
- Post-earthquake inspections of damaged RC buildings have demonstrated that poorly detailed beam-column joints can suffer serious damage. The effectiveness of a rehabilitation method based on joint enlargement using prestressed steel angles to
enhance the seismic behaviour of damaged external reinforced concrete beam-column joints was experimentally investigated. Three half scale external RC beam-column joints with seismic and non-seismic reinforcement details were tested before and after rehabilitation by applying lateral cyclic loading of increasing amplitudes. Tested
specimens were comprised of one unit having seismic reinforcement detailing and two units having non-seismic reinforcement detailing. Two defects were considered for the non-seismic units, being the absence of transverse steel hoops and insufficient bond capacity of beam bottom steel reinforcing bars in the joint panel zone. The damaged specimens were rehabilitated by injecting epoxy grout into existing cracks and installing stiffened steel angles at the re-entrant corners of the beam-column joint, both above and below the beam, that were mounted and held in place using prestressed high tensile strength bars. The test results indicated that the seismic performance of the rehabilitated
specimens, in terms of strength, stiffness and ductility were fully recovered with respect to the performance of the seismically detailed specimen in the initial loading.
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- FRG strengthening systems for masonry building
- A. Balsamo ; I. Iovinella ; G. Morandini
- Book Title / Journal: New Zealand Society for Earthquake Engineering (NZSEE) Annual Technical Conference
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: masonry buildings ; Fiber-Reinforced Grouting ; Fiber-Reinforced Polymer
- Description
- Up to the middle of the last century the main building material was masonry, that is why in most countries there are many masonry buildings and many of these have great historical or social value.
These buildings, located in seismic areas, due to their age are deteriorated by environmental and human factors. This combination of factors causes a very alarming situation that causes a growing interest toward a new strengthening system. Researchers are orientated toward a less invasive and reversible system possibly avoiding resin and
organic materials.
Thanks to recent applications, especially on historical buildings, it was possible to realize a strengthening system based on application of FRP grid and mortar matrix (FRG). Much experimentation was conducted to test the effectiveness of this technology on different kinds of masonry.
The present paper resumes the latest tests carried out by the University of Naples on different masonry panels tested under diagonal compression.
Experimental campaign investigated preliminarily on material properties of based component from bricks to reinforcing mortar. The experimental results confirmed the effectiveness of the investigated strengthening technique to increase the panels shear strength and validated the effectiveness of this reinforcing sysTem on different kinds of masonry.
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- Displacement-based seismic design of damped braces for retrofitting in-elevation irregular framed structures
- A. Vulcano ; M. Mazza ; F. Mazza.
- 2nd European Conference on Earthquake Engineering and Seismology, Istanbul, Turkey
- Book Title / Journal:
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
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- Numerical study of URM infilled reinforced concrete frame retrofitted with embedded reinforcing steel
- A. Stavridis ; A.R. Barbosa ; R. Soti
- 2nd European Conference on Earthquake Engineering and Seismology, Istanbul, Turkey
- Book Title / Journal:
- Year: 2014 , Volume: , Series:
- Repair and Retrofit of Structures
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- Seismic retrofitting solution of an adobe masonry wall
- C. Oliveira ; D. Silveira ; A Costa ; H. Varum ; A. Figueiredo
- text
- Book Title / Journal: Materials and Structures, RILEM, 46, 1-2, 203-219
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
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- Dingman Drive Bridge: Reinstatement of severed strands on prestressed concrete girders damaged by vehicle impact
- A.F. Turnbull ; W.F. Young ; C. Lam
- PCI Journal, Winter 2013, pages 45-54.
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Bridges
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- Preservation of historical monumental structures using fibre reinforced polymer (FRP) - Case studies
- S.S. Sivaraja ; T.S. Thandavamoorthy ; S. Vijayakumar ; S.M. Aranganathan ; A.K. Dasarathy
- Procedia Engineering, Vol. 54, pages 472-479
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
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- The utility theory in maintenance and repair strategy
- O. Kaplinski
- Procedia Engineering, Vol. 54, pages 604-614
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
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- In-situ health assessment of a poorly executed pre-stressed in-service concrete bridge and suggesting a rehabilitation strategy – A case study
- S.A. Rizwan ; F.A. Najam ; M.A. Qureshi
- Procedia Engineering, Vol. 54, pages 636-647
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Bridges
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- Seismic analytical model for retrofitted old reinforced concrete structures
- M. Zeinoddini ; A. Dabiri
- Procedia Engineering, Vol. 54, pages 188-206
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Concrete structures
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- Seismic protection of r/c structures by a new dissipative bracing system
- M. Valente
- Procedia Engineering, Vol. 54, pages 785-794
- Book Title / Journal:
- Year: 2013 , Volume: , Series:
- Repair and Retrofit of Structures
- Keywords: Concrete structures
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