TY - JOUR
T1 - Bed joint reinforcement of shear walls using threaded titanium rods
AU - Castori, Giulio
AU - Haile, Fitsum
AU - Corradi, Marco
AU - Adkins, Jill
N1 - Funding information: The authors wish to record their appreciation to the Northumbria laboratory staff, Dr Lizzy James and Mr Leon Amess, who assisted greatly in making this testing possible.
PY - 2024/1/15
Y1 - 2024/1/15
N2 - Shear walls in historic constructions often require retrofit. The lateral load capacity is frequently insufficient to withstand seismic actions. Threaded titanium rods embedded in mortar bed joints have emerged as a viable solution to reinforce brickwork shear walls. The use of a high tensile strength and ductile material (titanium alloys), with a high degree of reversibility of the retrofit intervention, is promising as it represents a new opportunity in masonry conservation. Aiming at studying the effectiveness of the titanium rod repair, this research had a twofold goal: 1. laboratory tests were performed to investigate the structural response of reinforced walls at macro-scale level; 2. a numerical modelling strategy was implemented to fill the knowledge gap regarding the material properties of brickwork masonry (English and Flemish bond). Quasi-static cycling loading tests performed on full scale (1200x1200 mm, two wythes thickness) specimens demonstrated how bed joint reinforcement using threaded titanium rods produced a significant increase in the lateral load and deformation capacities. To provide an effective tool for predicting all material parameters, as input data, and for designing the proposed strengthening system, a step-by-step procedure - based on the use of digital image processing (DIP) techniques, homogenization theories and micro-modelling strategies - was therefore proposed.
AB - Shear walls in historic constructions often require retrofit. The lateral load capacity is frequently insufficient to withstand seismic actions. Threaded titanium rods embedded in mortar bed joints have emerged as a viable solution to reinforce brickwork shear walls. The use of a high tensile strength and ductile material (titanium alloys), with a high degree of reversibility of the retrofit intervention, is promising as it represents a new opportunity in masonry conservation. Aiming at studying the effectiveness of the titanium rod repair, this research had a twofold goal: 1. laboratory tests were performed to investigate the structural response of reinforced walls at macro-scale level; 2. a numerical modelling strategy was implemented to fill the knowledge gap regarding the material properties of brickwork masonry (English and Flemish bond). Quasi-static cycling loading tests performed on full scale (1200x1200 mm, two wythes thickness) specimens demonstrated how bed joint reinforcement using threaded titanium rods produced a significant increase in the lateral load and deformation capacities. To provide an effective tool for predicting all material parameters, as input data, and for designing the proposed strengthening system, a step-by-step procedure - based on the use of digital image processing (DIP) techniques, homogenization theories and micro-modelling strategies - was therefore proposed.
KW - Brickwork masonry
KW - Earthquake
KW - Numerical analyses
KW - Retrofit
KW - Titanium
UR - http://www.scopus.com/inward/record.url?scp=85175637747&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2023.117099
DO - 10.1016/j.engstruct.2023.117099
M3 - Article
AN - SCOPUS:85175637747
SN - 0141-0296
VL - 299
JO - Engineering Structures
JF - Engineering Structures
M1 - 117099
ER -