Weitere Artikel dieser Ausgabe durch Wischen aufrufen
Russian translation published in Mekhanika Kompozitnykh Materialov, Vol. 54, No. 2, pp. 309-330, March-April, 2018.
The paper presents a numerical study on the retrofit of traditional masonry with pultruded GFRP profile frames adjacent to a wall and connected to it by mechanical fasteners. This kind of retrofit solution, not having been explored yet either in theory or practice, is similar to the common steel frame retrofits, but offers the advantages of lightness and durability of FRP composite materials. The retrofit system proposed, once proven effective and advantageous, would bring a considerable potential innovation into its available options. Three different frame geometries and two cases of masonry thickness were considered to investigate the effectiveness of the retrofit GFRP frame on the inplane static response of the wall to horizontal loads. The global and local (connection) failure behavior of the wall-frame system was investigated using the 3D finite-element method. A general increase in strength after the retrofit, up to about 130%, was found, and a switch from rocking to the diagonal tension failure mode was observed. The strength hierarchy of the retrofitted systems was also analyzed to clarify the effectiveness of the retrofit in imparting a residual strength to masonry. A thinner masonry structure was clearly recognized to have got the greatest benefits, but the retrofit could also significantly improve the inplane shear strength of a thicker wall. A comparison with steel structures of analogous capacity in terms of weight and natural vibration frequencies supported the viability of composite FRP frames for retrofit.
Bitte loggen Sie sich ein, um Zugang zu diesem Inhalt zu erhalten
Sie möchten Zugang zu diesem Inhalt erhalten? Dann informieren Sie sich jetzt über unsere Produkte:
L. C. Hollaway, “A review of the present and future utilisation of FRP composites in the civil infrastructure with reference to their important in-service properties,” Constr. Build. Mat., 24, No. 12, 2419–2445 (2010).
S. Russo, “Testing and modelling of dynamic out-of-plane behavior of the historic masonry façade of Palazzo Ducale in Venice, Italy,” Eng. Struct., 46, 130-139 (2013). CrossRef
S. Russo and F. Sciarretta, “Masonry exposed to high temperatures: Mechanical behavior and properties — An overview,” Fire Saf. J., 55, 69-86 (2013). CrossRef
L. Jurina, The structural retrofit of San Dalmazio Tower in Pavia [in Italian], in: 15th Convegno Nazionale CTA, Riva del Garda, Italy, 15-18 October 1995, pp. 257-270 (1995).
I. Nishizaki et al., A case study of life cycle cost based on a real FRP bridge, in: A. Mirmiran and A. Nanni (eds.), 3rd International Conference on FRP Composites in Civil Engineering, Miami, USA, 13-15 December 2006, pp. 99-102 (2006).
S. Russo, “Experimental and finite element analysis of a very large pultruded FRP structure subjected to free vibration”, Compos. Struct., 94, No. 3, 1097-1105 (2012). CrossRef
V. Mara, R. Haghani and P. Harryson, “Bridge decks of fibre-reinforced polymer (FRP): A sustainable solution”, Constr. Build. Mat., 50, 190-199 (2014). CrossRef
A. Borri and A. Giannantoni, “Pultruded FRP members: the retrofit of wooden decks,” [in Italian], L’edilizia, 134, 52-57 (2004).
G. Boscato and S. Russo, Structural performance of iron-wood-FRP pedestrian bridge, in: M. Motavalli (ed.), 4th International Conference on FRP Composites in Civil Engineering, Zurich, CH, 22-24 July 2008, EMPA-Akademie, Zurich (2008).
S. Cattari, S. Lagomarsino et al., Critical review of analytical models for the in-plane and out-of-plane assessment of URM buildings, in: New dimensions in earthquake resilience – 2015 NZSEE Technical Conference and AGM, Rotorua, New Zealand. 10-12 April 2015, Paper 111
M. El-Diasity et al., “Structural performance of confined masonry walls retrofitted using ferrocement and GFRP under in-plane cyclic loading,” Eng. Struct., 94, 54-59 (2015) CrossRef
G. Marcari, G. Manfredi et al., “In-plane shear performance of masonry panels strengthened with FRP,” Compos. Part B, 38, 887-901 (2007). CrossRef
S. Russo, “Effect of FRP mesh rebar on the shear strength of masonry,” Masonry Int., 18, No. 1, 1-10 (2005).
D. Dizhur, J. Ingham et al., “Performance of masonry buildings and churches in the 22 February 2011 Christchurch earthquake,” NZSEE Bull., 44, No. 4, 279-296 (2011).
A. Papalou, “Strengthening of masonry structures using steel frames,” Int. J. Eng. Technol., 2, No. 1, 50-56 (2013).
D. C. Rai and S. C. Goes, “Seismic strengthening of unreinforced masonry piers with steel elements,” Earthq. Spectra, 12, No. 4, 845-862 (1996). CrossRef
EUROCODE 8, EN 1998-1: Design of structures for earthquake resistance. – Part 1: General rules, seismic actions and rules for buildings, CEN, Brussels (2005).
Republic of Italy, Ministry of Infrastructures and Transportations, Technical Code for Construction, Decree of 14 Jan 2008. Ordinary Annex to the Official Gazette, No. 30 (2008).
FEMA - Federal Emergency Management Agency, FEMA 356 Prestandard and commentary for the seismic rehabilitation of buildings, ATC, Washington (2000).
ICC, International Code Council, International Existing Building Code, ICC Publications, 3rd printing, Country Club Hills (2012).
NZSEE, New Zealand Society for Earthquake Engineering, Assessment and improvement of unreinforced masonry buildings for earthquake resistance. Supplement to: Assessment and improvement of the structural performance of buildings in earthquake. Recommendations of a NZSEE study group. Draft 12 (2011).
Th. P. Tassios, Meccanica delle murature, Liguori, Naples (1990).
V. Gattulli et al., Seismic retrofitting and structural health monitoring of a masonry vault by using GFRP grids with embedded FBG sensors, in: F.K. Chang, F. Kopsaftopoulos (eds.), 10th International Workshop on Structural Health Monitoring, Stanford University, USA, 1–3 September 2015, 1616-1623, DEStech Publications (2015).
P. B. Lourenco and N. Mendes, Seismic vulnerability of existing masonry buildings: nonlinear parametric analysis, in: I. N. Psycharis, S. J. Pantazopoulou and M. Papadrakakis (eds.), Seismic Assessment, Behavior and Retrofit of Heritage Buildings and Monuments, Vol. 37, Computational Methods in Applied Sciences, Springer, Zurich, 139-164 (2015).
L. C. Bank, “Progressive failure and ductility of FRP composites for construction: review,” J. Compos. Constr., 17, No. 3, 406-419 (2013).
E. Pietropaoli, “Progressive failure analysis of composite structures using a constitutive material model (USERMAT) developed and implemented in ANSYS,” J. Appl. Compos. Mater., 19, 657-68 (2012). CrossRef
J. Qureshi and J. T. Mottram, “Response of beam-to-column web cleated joints for FRP pultruded members,” J. Compos. Constr., 18, No. 2, 04013039 (2014).
C. Casalegno and S. Russo, “FE progressive failure analysis of all-GFRP pultruded beam-column bolted joints,” Compos. Mech. Comput. Applic. Int. J., 5, No. 3,173-193 (2014).
CNR DT 205/2007: Instructions for design, construction and control of structures made of thin-section pultruded Fibre-Reinforced Polymer composite (FRP) [in Italian], CNR, Rome (2008).
- Numerical Analysis of a Masonry Panel Reinforced with Pultruded FRP Frames
- Springer US
in-adhesives, MKVS, Neuer Inhalt/© Zühlke, Neuer Inhalt/© momius | stock.adobe.com