An Experimental Study on Alternative CFRP Retrofitting Applications of Heritage Structures

An Experimental Study on Alternative CFRP Retrofitting Applications of Heritage Structures

N. Torunbalci E. Onar F. Sutcu 

Faculty of Architecture, Istanbul Technical University, Istanbul, Turkey

Page: 
152-165
|
DOI: 
https://doi.org/10.2495/SDP-V6-N2-152-165
Received: 
N/A
| |
Accepted: 
N/A
| | Citation

OPEN ACCESS

Abstract: 

It is crucial for masonry structures of historical value to increase their seismic performances in order to be protected against earthquakes. The damages to the masonry structures might be attributed to insuffi cient soil properties, non-conformity with relevant regulations, design and application defects and wear. This study experimentally investigates the strengthening of the masonry structures on one side as historical structural walls can only be strengthened on one side in most cases. In the experimental works conducted within the scope of the study, the brick wall specimens, some of which are pre-damaged, are strengthened on one side using carbon fi bre reinforced polymers (CFRPs) in different forms. Comparisons are made between the change in the load-bearing capacities and behaviours of the specimens following the strengthening. It is determined that the brick wall specimens without reinforcement exhibit brittle behaviour, whereas the performances of the brick wall specimens strengthened with CFRP improve in strength ratings as well as energy dissipation capacities. The improvements in the specimens of the structural brick walls become much more outstanding when the strengthening is applied on the overall surface of the wall in textile form rather than in strip form.

Keywords: 

Masonry structures, strengthening heritage structures, fiber reinforced polymers

  References

[1] Ehsani, M.R., Saadatmanesh, H. & Velazquez-Dimas, J.I., Behaviour of retrofi tted URM walls under simulated earthquake loading. Journal of Composites for Construction, 3(3), pp. 134–142, 1999. doi:10.1061/(ASCE)1090-0268(1999)3:3(134)

[2] Albert, M.L., Elwi, A.E. & Cheng, R.J.J., Strengthening of unreinforced masonry walls using FRPs. Journal of Composites for Construction, 5(2), pp. 170–178, 2001. doi:10.1061/(ASCE)1090-0268(2001)5:2(76)

[3] Tan, K.H. & Patoary, M.K.H., Strengthening of masonry walls against out-of-plane loads using fi bre-reinforced polymer reinforcement. Journal of Composites for Construction, 9(1), pp. 79–87, 2004. doi:10.1061/(ASCE)1090-0268(2004)8:1(79)

[4] Hamid, A.A., El-Akhakhni, W.W., Hakam, Z.H.R. & Elgaaly, M., Behaviour of composite unreinforced masonry-fi bre-reinforced polymer wall assemblages under in-plane loading. Journal of Composites for Construction, 9(1), pp. 73–83, 2005. doi:10.1061/(ASCE)1090-0268(2005)9:1(73)

[5] Krevaikas, T.D. & Triantafi llou, T.C., Masonry confi nement with fi bre-reinforced polymers. Journal of Composites for Construction, 9(2), pp. 128–135, 2005. doi:10.1061/(ASCE)1090-0268(2005)9:2(128)

[6] ElGawady, M.A., Lestuzzi, P. & Badoux, M., Static cyclic response of masonry walls retrofi tted with fi ber-reinforced polymers. Journal of Composites for Construction, 11(1), pp. 50–61, 2007. doi:10.1061/(ASCE)1090-0268(2007)11:1(50)

[7] Onar, E., The experimental study on strengthening of structural brick masonry walls using carbon fi bre-reinforced polymers, M.Sc. Thesis, Institute of Science and Technology, Istanbul Technical University, 2007.

[8] American Society for Testing and Materials (ASTM). Standard test method for diagonal tension (shear) in masonry assemblages. Annual book of ASTM standards, E 519-81, Vol. 04.05, 1981.