About the Group
The overall objective of this work was to investigate the response of multi-story reinforced concrete structures resisting earthquake forces primarily through “cantilever” rather than frame action. A secondary but important objective was to demonstrate the consequences of initial yielding in the beam elements. The experimental work included tests of small scale perforated walls subjected to base motions simulating one horizontal component of representative earthquake records. These walls were designed using the principles of the “substitute-structure method” (Shibata, 1976) for a given design spectrum. The test results were used also to study the applicability of dynamic analyses based on linear response and “justify” the “subsitute-structure method” as a procedure for determining the design forces of reinforced concrete frames.