## 2 Literature Review  
The behavior of chemical or grouted anchors in solid clay brick masonry under tension loading was investigated in several experimental campaigns. In most cases, tests were monotonic and performed under load-controlled conditions. [PERSON] and [PERSON] [3] report the results of seventy-four (74) monotonic pull-out tests, performed under unconfined conditions, in anchors embedded in wallettes free of cracks and made of solid bricks. Three locations were examined for anchors located away from edges and corners, namely, in stretcher, header, and mortar joints (horizontal or intersection with vertical). In the case of anchors close to corners and edges, two locations were examined, namely, in stretcher and in header bricks, with varying distances from the edges. Anchors 10 mm to 16 mm in diameter were tested, whereas the embedment length varied between h\({}_{\text{ref}}\) = 90 mm and h\({}_{\text{ref}}\) = 230 mm. The experimental results have shown that for anchors installed in uncracked bricks (both stretcher and header) and depending on the embedded length, the observed failure modes were pull-out of the anchor, the (cone-shaped) brick breakout, brick pull-out, and a mixed mode involving pull-out of one brick followed by pull-out or pull-through of the anchor. For anchors installed in mortar joints, in most cases, pull-out of the anchor occurred. The edge effect consisted of the splitting of the brick or of the wall. [PERSON] et al. [4], based on field observations of anchor connections (damage surveys of clay brick URM buildings following the 2010/2011 Canterbury earthquakes), have studied the mechanical behavior of horizontal and inclined (22.5\({}^{\circ}\) downwards to the horizontal) anchors under monotonic tension loading. Approximately four hundred (400) in situ tests were performed to study the behavior of chemical or grouted anchors installed in existing solid brick masonry buildings. The anchors were installed in the middle of stretcher bricks and the test setup was designed to allow for the formation of an assumed 45o-failure cone. Six epoxy adhesive products from different manufacturers were used and were injected using a proprietary dispensing gun for each product. Cementitious fronts from two different manufacturers were used and were mixed onsite. The anchors had a nominal diameter of 12 mm, 16 mm, and 20 mm and they were examined and installed in various embedment lengths (between h\({}_{\text{ref}}\) = 100 mm and h\({}_{\text{ref}}\) = 400 mm). The results have shown that, in most cases, the anchors exceeded the design capacity assessed by the authors according to existing codes, namely, NZSEE [5] and FEMA [6]. [PERSON] et al. [7] investigated the tension behavior of grouted anchors installed in masonry wallettes made with solid clay bricks (compressive strength: 62 MPa), autoclaved aerated concrete blocks, and hollow bricks laid in cement-based mortar, M5 in the case of clay bricks, or M10 for walls made with autoclaved aerated concrete (AAC). One hundred eight (108) unconfined monotonic tension tests were performed on anchors, 10 mm in diameter, that were embedded at 90 mm to 160 mm in header or stretcher bricks or in uncracked mortar joints. The experimental results showed that as expected, the resistance was increasing for increasing embedment depths. [PERSON] et al. [8] have performed laboratory and in situ monotonic pull-out tests on grouted anchors installed in different types of masonry. Two injection mortar mixes were tested, a cement-based one (compressive strength: 55 MPa) and a lime-based one (compressive strength: 12 MPa). Reinforcing steel bars (d \(\approx\) 20 mm) were used as anchors and they were installed with a sock into a drilled borehole of d = 60 mm to at least two thirds of the wall thickness. Brick and mortar joint locations in uncracked substrate were tested. Within the testing program, one of the investigated parameters, namely, the compressive strength of the mortar, was proven to significantly affect the performance of the anchors.