AW. HENDRY University of Edinburgh
T.C. LIAUW University of Hong Kong

A cooperative project between the Universities of Hong Kong and Edinburgh was set up in 1987 with the object of investigating possible means of increasing the effectiveness of masonry infilling in steel frame structures. Two series of tests were carried out, the first at half scale with brickwork infill and the second with concrete blockwork infill. In the first series, the effect of shear connectors and of bed joint reinforcement was examined but neither of these proved particularly advantageous. The use of hollow blockwork in the second series was more promising and showed that it is possible to increase the failure toad of the composite frame by placing vertical reinforcement in the cores of the blockwork provided that local failure of the corner blocks can be prevented. Some tentative suggestions for design of monotonically loaded infilled frames are put forward.