DIMITRIJ PUME Building Research Institute, Technical University, Prague, Czechoslovakia


The storey-height reinforced concrete-masonry wall panels designated JCKD, are composed of unbonded masonry contained within a rectangular reinforced concrete grid. The panels represent a particular case of material arrangement in a structural member under compression.
In this paper, a small wall under compression, consisting of elements stressed in parallel, made from three materials (concrete, steel and brick) and placed symmetrically, is proposed as the theoretical model for the investigation of the strength of the JCKD wall panels.
Using the model, the fundamental physical relationship between the normal vertical load and the vertical contraction of the composite panel is derived and verified by experimental investigation of 17 masonry specimens, 12 composite small walls and 15 storey-height composite wall panels.