This article summarizes the results obtained from the application of two investigation techniques, namely radar and boroscopy, in the masonry of the Katholikon of Dafni Monastery (Attica, Greece). The two techniques were applied with the aim to investigate the type of construction of the monument's perimeter masonry. The application of these two techniques proved to be quite efficient because their results offered reliable information regarding the thickness of stones and thus the thickness of the internal filling material in the monument's three-leaf stone masonry. This article presents and comments on difficulties encountered during the application of these techniques, as well as problems that arose during the interpretation of measurements and observations.

In this experimental campaign, concrete‐to‐concrete interfaces were examined under cyclic actions, crossed by postinstalled reinforcing bars or industrial steel screws. In addition, the effect of the embedment length and the roughness was investigated. It was observed that different failure modes occur, depending on the different connector types and embedment depths. The positive effect of roughness on the interface resistance was confirmed, but the results indicate that, for very high roughness values, the resistance may be smaller than for moderate values. It was also noticed that the behavior of interfaces crossed by mechanical anchors was less stiff in the ascending branch and exhibited a less steep falling branch. The extension of the project on testing thin overlays showed that the resistance was significantly affected in case of cyclic loading, suggesting that the use of any type of anchor in seismic conditions needs to be supported by adequate experimental evidence.

This paper presents a part of an extensive experimental campaign performed at the National Technical University of Athens (NTUA) with the purpose of investigating the behavior of chemical anchors embedded in solid brick masonry. Anchors are tested in tension under monotonic or repeated loading. All tests are performed under displacement-controlled conditions. The experimental setup and the instrumentation are presented, along with the investigated parameters and the rationale for the selection of the values of those parameters. In this part of the experimental work, comprising fifty-six (56) tests, the examined parameters are the anchor locations (in mortar joints and in the center of bricks), the state of the substrate (cracked or uncracked), the width of the crack crossing the anchor or at its vicinity (up to 1.20 mm), as well as the loading history (monotonic or repeated). In the tests presented herein, the embedment length of the anchors is equal to 100 mm. The anchors are embedded in solid brick masonry wallettes, and subjected to a normal compressive stress equal to 0.20 MPa. The observed failure modes are explained, and the overall behavior of anchors subjected to tension is presented and commented upon, along with the effect of the investigated parameters on the measured tension resistance, and on the corresponding displacement.

The arched stone masonry bridge near the town of Konitsa, over Aoos river (1869 A.D.), was damaged and repaired in 1913 by using concrete. The RC jacket at the intrados is in critical state, exhibiting advanced concrete disintegration and reinforcement corrosion, with minor damage in the original structure of the bridge. In order to provide an intervention scheme for the preservation of the monument and to check whether the reconstruction of the RC jacket needs to be part of the intervention scheme, an overall study of the bridge was undertaken. In this paper, the in-situ and in-lab documentation is presented. To this purpose, non-destructive techniques were applied, along with material sampling and laboratory testing, whereas photogrammetric survey and geotechnical investigation were performed. The collected data serve the purpose of documenting the bearing structure of the bridge and interpreting construction peculiarities revealed during in-situ work.