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Three-dimensional seismic analysis and design of damage resistant tall rocking core wall buildings

A new non-planar rocking core wall system for the earthquake-damage-resistant design of multistory buildings is introduced. That new system uses a post-tensioned non-planar core wall designed to uplift at a robust rocking plane. Hysteretic energy dissipation devices, post-tensioning steel strands, headed reinforcement, and special confinement reinforcement are used to control the stiffness, strength, and energy dissipation characteristics of the rocking plane and minimize damage. The system is used and validated based on the three-dimensional nonlinear response history analysis of a 20-story building subjected to severe triaxial near-fault pulse-like ground shaking. A new beam-truss model approach, which explicitly accounts for flexure-shear interaction, is used to model the building including the slabs. The response of the building is compared to that of a building of similar geometry designed using a conventional structural core wall.

Author(s):

Yuan Lu    
University of California, Berkeley
United States

Marios Panagiotou    
University of California, Berkeley
United States