Abstract
Reinforced concrete multi-story structural walls supported on pile foundations are commonly designed assuming that they stand on solid foundation without considering their interaction. In this paper, two specimens were tested to simulate their seismic force resisting mechanisms. They consisted of the lowest three floors of structural wall, the first floor slab, a foundation beam and the part of piles. Flexural-shear cracks formed in the structural wall developed to the foundation beam, and the part of the structural wall, the foundation beam and the compressive pile made a solid assemblage rotated about the lower flexural compressive region of the foundation beam. Proposed macro model focusing on the dominant flexural-shear crack made it possible to distinguish fracture modes and to simulate lateral load-deformation angle relationship of the specimens with good accuracy.
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