Investigation of tie-rod connection types on stone masonry arches

Tie-rods fixed in different ways in arch and column (pillar) junction areas of historical structures are frequently encountered. These tension members used to sustain the stability of arches play a significant role in the survival of the whole building. In this study, the effect of different tie-rod systems that are fixed on stone arches on the overall behavior of arch is investigated. In the scope of this study, seven stone arches, one reference with no tierod, and six repaired using different tie-rod systems were tested under vertical loading. Tested specimens were also analyzed numerically using a commercial computer program called LUSAS. The data obtained as a result of the experiments and the outputs obtained from the numerical models were compared with each other. The main aim of this research is to examine the efficiency, viability, and practicality of replacement techniques recommended for tie-rods in historic masonry stone arches. At the end of the study, the difficulties in the application of tie-rod systems in restoration and strengthening works are examined and the most suitable tie-rod system is revealed by drawing attention to mistakes made during restoration works.