Issue 39

V. Salajka et alii, Frattura ed Integrità Strutturale, 39 (2017) 88-99; DOI: 10.3221/IGF-ESIS.39.10 90 a) Model of a pillar, including deformeters b) Three neighbouring blocks Figure 2: Computational model of a high brick pillar. a) Top area – values from the deformeter. b) Bottom area – values from the deformeter. Figure 3 : A sample of C 1-1 Specimen – load-dependent vertical strain ε. A NALYSIS OF BEHAVIOR OF CYCLIC LOADED CLAY BLOCK WALLS ests of the structure of the masonry walls built from precise burnt masonry elements of the clay blocks POROTHERM 44 T Profi loaded by a cyclically forced loading correspond to the shear tests of walls of the actual size. Four walls of the different width were tested. The walls of the greater length are marked “L” and the shorter walls are marked “S”, (Fig. 4). The vertical walls were built on a rigid reinforced-concrete beam that was attached firmly to the floor so that the shear displacement along the floor and beam tilting were eliminated. The transmission of the vertical forces was carried out by steel sections and four independent hydraulic cylinders and one program-controlled hydraulic cylinder bringing in the lateral displacement (along the wall) cyclically corresponding to the seismic loading. The controlled lateral displacement was introduced to the beam by the predominating masonry wall. The individual blocks were lined on thin joint mortar of 1 mm thickness. The mortar is only in horizontal joints, vertical indented joints are dry. Idealized and real lateral displacement time history is shown on the Fig. 5. During the experiment, the vertical and horizontal forces and the displacements at predetermined points were measured (Fig. 6). An optical camera measurement system was used to determine the motion of the wall surfaces. The lateral force (resistance) dependencies on the lateral displacement were the result of the measurement. The measurements provided data regarding dependencies of vertical force (resistance) on transverse displacement. The results of the experiments are arranged in a tabular form. T