ABSTRACT
In the 1940s, historic buildings of steel frames appeared in Shanghai Bund. The structural system of these buildings is composed of steel columns, steel beams and cast-in-place slabs. Different from modern steel frames, steel columns are connected with beams by angle steels and the joints are close to hinged joints. Strain gauges were attached on steel plates and H-steel at different heights to study their coordinating performance. Vertical loads were applied on the top of steel columns by a spreader beam. The damage of steel frames in infilled frames is more severe than that of bare frame due to the larger initial stiffness, and thus the contribution of infilled walls of some specimens in the late stage is even negative. Specimen description Six infilled steel frames were all 2800 mm long by 2450 mm high. Specimen's bare frame and solid wall were designed as control specimens.
