SEISMIC BEHAVIOR OF SLENDER COUPLED WALL SYSTEMS

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SEISMIC BEHAVIOR OF SLENDER COUPLED WALL SYSTEMS
By J. Dario Aristizabal-Ocfaoa1
ABSTRACT: This paper provides the design engineer with applicable
information on the seismic behavior of reinforced-concrete, slender
coupled wall systems and its constitutive elements (i.e., coupling beams
and structural walls). A review of available experimental information is
presented. Significant design parameters as well as research needs are
identified. It is concluded that a reasonable balance must be maintained
between the stiffnesses, strengths, and available rotational ductilities of
walls and coupling elements. Thus, the overall response of tall buildings
resisting severe lateral loads through coupled walls is that of a ductileand-
tough-beam strong-wall system. The coupling elements must be the
major suppliers of hysteretic damping and the walls the major suppliers
of lateral stiffness and strength. The importance of proper anchorage of
the flexural steel and confinement reinforcement is emphasized. Design
recommendations on the ultimate design of structural walls and coupling
elements are presented.

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