Strengthening of Arched Masonry Structures by Additional Reinforcement: Design Approaches and Comparison to Experiments

Martin Zlámal; Petr Štěpánek

doi:10.7250/bjrbe.2018-13.419

Strengthening of Arched Masonry Structures by Additional Reinforcement: Design Approaches and Comparison to Experiments

Authors

Martin Zlámal Institute of Concrete and Masonry Structures, Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic
Petr Štěpánek Institute of Concrete and Masonry Structures, Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic

DOI:

https://doi.org/10.7250/bjrbe.2018-13.419

Keywords:

arched bridge, design approaches, glass fibre reinforced polymer (GFRP), masonry, strengthening, Strut-and-Tie model, vault

Abstract

The primary aim of this article is to present design approaches for calculating the additional strengthening of masonry arches with the use of the Strut-and-Tie model and applicable standards and their comparison to the experiments. Experiments have proven the functionality of the described method of strengthening by additional inserted non-prestressed reinforcement from the face of the vault. The presented method is one of the methods of maintaining historical vaulted masonry structures, and is also used to improve the behaviour of newly designed masonry structures. This method of strengthening has its advantages, especially in the minimization of alterations to the structure and its simplicity of application. To compare the results and verify the vaults behaviour, experiments were performed with using a metallic helical reinforcement and non-metallic composite glass reinforcement. These experiments have demonstrated the significant influence of additional reinforcement on the carrying capacity of masonry vaults. The growth of bearing capacity was more than eight-fold. From a comparison of design approaches to experiments is evident that approaches to the design of additionally strengthened masonry based on valid standards are possible. The comparison of results moreover demonstrates the possibility of using approaches based on the Strut-and-Tie model.

References

Alecci, V., Misseri, G., Rovero, L., Stipo, G., De Stefano, M., Feo, L., & Luciano, R. (2016). Experimental investigation on masonry arches strengthened with PBO-FRCM composite. Composites Part B: Engineering, 100, 228-239. https://doi.org/10.1016/j.compositesb.2016.05.063

Anania, L., Badalà, A., & D’Agata, G. (2013). The post strengthening of the masonry vaults by the Ω-Wrap technique based on the use of C-FRP. Construction and Building Materials, 47, 1053-1068. https://doi.org/10.1016/j.conbuildmat.2013.05.012

Borri, A., Castori, G., & Corradi, M. (2011). Intrados strengthening of brick masonry arches with composite materials. Composites Part B: Engineering, 42(5), 1164-1172. https://doi.org/10.1016/j.compositesb.2011.03.005

Campione, G., Cavaleri, L., & Papia, M. (2016). Advanced Strategies and Materials for Reinforcing Normal and Disturbed Regions in Brick Masonry Columns. Journal of Composites for Construction, 20(4), 04016013. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000660

Ďurech, D., Štěpánek, P., & Horák, D. (2010). Renovation of a bridge using GFRP reinforced concrete slab. In Proceedings of the CESB 2010 PRAGUE - Central Europe towards Sustainable Building 2010: from Theory to Practice, 30 June – 2 July 2010, Prague, Czech Republic. 1-13.

EN 1996-1-1 + A1:2013 Eurocode 6: Design of Masonry Structures - Part 1-1: Common Rules for Reinforced and Unreinforced Masonry Structures

Fauchoux, G., & Abdunur, C. (1998). Strengthening masonry arch bridges through backfill replacement by concrete. In Proceedings of the 2nd International Arch Bridge Conference, Sinopoli ed.(Balkema, Rotterdam, 1998) (pp. 417-422).

Foraboschi, P. (2004). Strengthening of masonry arches with fiber-reinforced polymer strips. Journal of composites for construction, 8(3), 191-202. https://doi.org/10.1061/(ASCE)1090-0268(2004)8:3(191)

Foraboschi, P., & Vanin, A. (2013). Non-linear static analysis of masonry buildings based on a strut-and-tie modeling. Soil Dynamics and Earthquake Engineering, 55, 44-58. https://doi.org/10.1016/j.soildyn.2013.08.005

Girgle, F., & Štěpánek, P. (2016). An anchoring element for prestressed FRP reinforcement: simplified design of the anchoring area. Materials and Structures, 49(4), 1337-1350. https://doi.org/10.1617/s11527-015-0580-z

Horak, D., Girgle, F., & Stepanek, P. (2013). Effect of Concrete Cover on Developing Lengths of FRP Bars. In Proceedings of the CESB 2013 PRAGUE - Central Europe towards Sustainable Building 2013: Sustainable Building and Refurbishment for Next Generations, 26−28 June 2013, Prague, Czech Republic. 357-360.

Horák, D., Zlámal, M., & Štěpánek, P. (2014). Behavior of FRP- RC Members During Exposure to Fire, Special concrete and Composites 2014 - Advanced Materials Research, 1054: 27-32. https://doi.org/10.4028/www.scientific.net/AMR.1054.27

Oliveira, D. V., Basilio, I., & Lourenço, P. B. (2010). Experimental behavior of FRP strengthened masonry arches. Journal of Composites for Construction, 14(3), 312-322. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000086

Paeglitis, A., Paeglitis, A., Vitiņa, I., & Igaune, S. (2013). Study and Renovation of Historical Masonry Arch Bridge, Baltic Journal of Road and Bridge Engineering, 8(1): 32-39. https://doi.org/10.3846/bjrbe.2013.05

Seim, W., & Pfeiffer, U. (2011). Local post-strengthening of masonry structures with fiber-reinforced polymers (FRPs). Construction and Building Materials, 25(8), 3393-3403. https://doi.org/10.1016/j.conbuildmat.2011.03.030

Tao, Y., Stratford, T. J., & Chen, J. F. (2011). Behaviour of a masonry arch bridge repaired using fibre-reinforced polymer composites. Engineering Structures, 33(5), 1594-1606. https://doi.org/10.1016/j.engstruct.2011.01.029

Zlámal, M, & Štěpánek, P. (2010). Strengthening of Masonry Vaulted Structures. In Proceedings of the CESB 2010 PRAGUE - Central Europe towards Sustainable Building 2010: from Theory to Practice, 30 June – 2 July 2010, Prague, Czech Republic. 221-224.