Citation

Soleimani-Dashtaki S, Ventura CE, Banthia N. Procedia Eng. 2017; 210: 154-164.

Copyright

(Copyright © 2017, Elsevier Publishing)

DOI

10.1016/j.proeng.2017.11.061

PMID

unavailable

Abstract

In another paper at this workshop, the development of Eco-Friendly Ductile Cementitious Composite (EDCC) and its response to uniaxial tensile is described. Here, its performance when used as a strengthening coat on unreinforced masonry is described. This paper elaborates on the results of shake table tests on full-scale masonry wall specimens, each about 2m wide by 3m high, retrofitted using sprayed EDCCs. Six full-scale unreinforced non-grouted masonry wall specimens were assembled and then retrofitted using Sprayable EDCC. The walls are tested at the Earthquake Engineering Research Facility (EERF) at UBC on the Linear Shake Table (LST) under different ground motions with varying intensities. The wall specimens were fully instrumented and data were collected using 34 different channels including 10 accelerometers, 8 channels of displacement sensors, 8 strain gauges and time synchronized video recording using eight HD cameras. Test indicated that even a single-sided retrofit with appropriate EDCC can significantly enhance the overall ductility of the system and change the fundamental behaviour of the wall from a typical "Rocking Mechanism" to a "Beam" type behaviour, with significant rotations at the hinge supports of the base. The added flexibility to the system resulted in a substantial increase in energy dissipation, and thereby increasing the overall drift limits before collapsing, causing the wall to withstand extensive levels of shaking under different types and intensities of earthquake generated ground motions.

Language: en

Keywords

Dynamic Effect; Dynamic Loading; ECC; Eco-Friendly Ductile Cementitious Composite; EDCC; Engineered Cementitious Composite; Fiber Reinforced Concrete; FRC; High Rates of Loading; High Strain Rate; Loading Rate Effect; Strain Rate Effect; Tensile Strength