Experimental Results on Masonry Infilled RC Frames for Monotonic Increasing and Cyclic Lateral Load

The main goal of this paper is to present an executed research experiment, planned to include a group of 15, one-third scale, one-bay, two-storey reinforced concrete (RC) frame specimens infilled with masonries with different stiffness. The aim of the complete research experiment was to analyse, in accordance with the international scientific research trend, the behaviour of masonry infilled concrete frames for earthquake action, particularly for cyclic lateral loading under and over the appearance of the main continuous diagonal, corner-to-corner cracks. In the first step the infilled frames were loaded in one direction with monotonic increasing lateral loads. In the second step of the research the infilled frames were investigated in two lateral directions in cases of cyclic top loading with different load histories. This paper shows the conclusions of the experimental programme.