Ductile Design of Intermediate Horizontal Boundary Elements in Steel Plate Shear Walls

Abstract eng:
Multi-story steel plate shear walls (SPSW) are progressively being used as the primary lateral force resisting system in buildings. However, insufficient information exists on the behavior of intermediate beams in this structural system as well as the performance of such beams having reduced beam sections (RBS). Using the results of an MCEER/NCREE collaborative experimental investigation on a full scale two-story SPSW specimen subjected to pseudo-dynamic load and subsequent cyclic load to failure, analytical models are developed to better understand intermediate beam behavior. In particular, the observed yield patterns and failure modes of the intermediate beam, which are inconsistent with predictions per simple model, are briefly described in this paper. In addition to the above, this paper also presents analysis capable of capturing the characteristic and behavior of intermediate beams with RBS connections. Based on capacity design concept, innovative design procedures and recommendations are provided to ensure the ductile behavior of intermediate beams in SPSW.

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