In this article, the experimental results of hybrid-fiber engineered cementitious composite (HFECC)-strengthened masonry walls subjected to quasi-static out-of-plane loadings are reported. The aim is to assess the extent to which HFECC-strengthening systems can improve the out-of-plane resistance of unreinforced masonry walls. A total of 12 masonry panels were fabricated and tested in the laboratory under both patch load and uniformly distributed load. Test results showed significant improvement of HFECC-strengthened masonry wall’s performance against out-of-plane loadings. To provide design aid for such HFECC-strengthened masonry walls, simplified theoretical models were also developed to predict its out-of-plane ultimate load-carrying capacities based on the observed failure mechanisms. The theoretically predicted values compared favorably with experimental data.
Wenzel, F. ( 1989). On the Structural Repair of Masonry, In: Brebbia, C.A. (ed.), Structural Repair and Maintenance of Historical Buildings, pp. 83-94, Computational Mechanics Publications, Southampton, Boston.
2.
Ehsani, M.R. ( 1995). Strengthening of Earthquake-Damage Masonry Structures with Composite Materials, In: Taerwe, L. (ed.), Non-metallic (FRP) Reinforcement for Concrete Structures, pp. 680-687, Spon , London.
3.
Triantafillou, T.C. (1998). Strengthening of Masonry Structures Using Epoxy-Bonded FRP Laminates, Journal of Composites for Construction, ASCE, 2(2): 96-104.
4.
Gilstrap, J.M. and Dolan, C.W. (1998). Out-of-Plane Bending of FRP-Reinforced Masonry Walls, Composite Science and Technology , 58: 1277-1284.
5.
Li, V.C. ( 1998). Engineered Cementitious Composites - Tailored Composites through Micromechanical Modeling, In: Banthia, N., Bentur, A. and Mufti, A. (eds), Fiber Reinforced Concrete: Present and the Future, pp. 64-97, Canadian Society of Civil Engineers , Montreal.
6.
Kanda, T. and Li, V.C. ( 1999). A New Micromechanics Design Theory for Pseudo Strain Hardening Cementitious Composite, Journal of Engineering Mechanics, ASCE, 125(4): 373-381.
7.
Kim, J.K. , Kim, J.S., Ha , G.J. and Kim , Y.Y. (2007). Tensile and Fiber Dispersion Performance of ECC (Engineered Cementitious Composites) Produced with Ground Blast Furnace Slag, Cement and Concrete Research, 37: 1096-1105.
8.
Li, V.C. and Kanda, T. (1998). Engineered Cementitious Composites for Structural Applications, Materials in Civil Engineering, 10(2): 66-69.
9.
Zhang, J., Maalej, M. and Quek, S.T. ( 2004). Hybrid Fiber Engineered Cementitious Composites (ECC) for Impact and Blast-Resistant Structures, In: Proceedings of First International Conference on Innovative Materials and Technologies for Construction and Restoration-IMTCR04, Lecce, pp. 136-149.
10.
Li, V.C. , Dhanada, K.M. and Wu , H.C. (1995). Matrix Design for Pseudo-Strain-Hardening Fiber Reinforced Cementitious Composites , Journal of Materials and Structures, RILEM, 28(183): 586-595.
11.
Maalej, M., Quek, S.T. and Zhang, J. ( 2005). Behavior of Hybrid-Fiber Engineered Cementitious Composites Subjected to Dynamic Tensile Loading and Projectile Impact, Journal of Material in Civil Engineering, ASCE, 17(2): 143-152.
12.
Ahmed, S.F.U. (2003). Corrosion Durability and Structural Response of Functionally-graded Concrete Beams, PhD Thesis , National University of Singapore.
13.
Li, M. and Li, V.C. ( 2006). Behaviour of ECC/Concrete Layered Repair System under Drying Shrinkage Conditions, Journal of Restoration of Buildings and Monuments, 12(2): 143-160.
14.
ASTM C 469-02 (2002 ). Standard Test Method for Static Modulus of Elasticity and Poisson’s Ratio of Concrete in Compression, ASTM International, West Conshohocken, PA (www.astm.org).
15.
BS5628 (1992). Code of Practice for the Use of Masonry, Part 1, British Standards Institution, London.
16.
Dawe, J.L. and Seah, C.K. ( 1989). Out-of-plane Resistance of Concrete Masonry Infilled Panels, Canadian Journal of Civil Engineering, 16: 854-864.
17.
Dawe, J.L., Liu, Y. and Seah, C.K. ( 2001). A Parametric Study of Masonry Infilled Steel Frames , Canadian Journal of Civil Engineering, 28: 149-157.
18.
Hendry, A.W. ( 1991). Reinforced and Prestressed Masonry, Longman Scientific & Technical, New York.
19.
Patoary, M.K.H. ( 2003). Strengthening of Masonry Walls against Out-of-Plane Loads Using FRP Systems, PhD Thesis, National University of Singapore .
20.
BS8110 (1998). Structural use of Concrete, Parts 1-3, British Standards Institution , London.
21.
Florin, G. ( 1980). Theory and Designs of Surface Structures - Slabs and Plates, pp. 193-194, Trans Tech Publications, West Germany.
22.
Ugural, A.C. ( 1999). Stress in Plates and Shells, 2nd edn, pp. 168-171, The McGraw-Hill, USA.
