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Earthquake Response of Coupled Shear Wall Buildings.
ichatrapimuk, T.
National Science Foundation, Washington, D.C., November 1976, 140 p.
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An efficient analytical technique for determining linear and nonlinear responses of coupled shear wall structures is developed. Walls are assumed to be non-yielding with all inelastic action confined to coupling beams. Structural displacements are then represented as a linear combination of the first few natural mode shapes in both lateral and longitudinal (vertical) vibration of individual walls which are treated as independent cantilevers. The number of degrees of freedom of the system is thereby substantially reduced. With such a reduction technique, vertical inertia need not be neglected and any mechanical model for coupling beams may be incorporated into the analysis. The effectiveness and flexibility of this general approach in reducing the number of degrees of freedom are demonstrated. The technique results in a considerable reduction in computational effort when compared to standard programs used to analyze inelastic structural response. The analytical technique is implemented in earthquake response analyses of two coupled shear wall systems; analytical results are then correlated with observations of earthquake damage in these structures. The earthquake response of coupled shear walls is then interpreted, and design considerations for efficient earthquake resistant shear wall systems are suggested.
Dynamic response; Ground motion; Theses; Earthquake engineering; Earthquakes; Shear stresses; Shear walls; Walls; Earth movements; Deflection; Design criteria; Degrees of freedom