Evaluation of Strength Reduction Factor for Existing Mid-Rise RC Buildings

Abstract eng:
Many earthquake prone countries in the world have significant amount of existing deficient buildings to be evaluated for seismic actions. Although nonlinear methods are more preferable for assessment of existing buildings, most of the practicing engineers are unfamiliar to these methods. Therefore, linear methods seem to be in use in the near future for assessment of great number of deficient existing buildings in a reasonable time. In linear methods, nonlinear behavior is taken into account by a single parameter: strength reduction factor (R). This study evaluates the use of R factors for different ductility levels, performance levels and soil types.

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