Abstract
This paper demonstrates stochastic features on torsional eccentricity of single-story and multi-story buildings with spatial variation of floor load and stiffness resistance. Probabilistic analyses by Hermite polynomial approximation to non-normal probability distribution and by Monte Carlo simulation technique are applied to the building models. Numerical results are illustrated on static eccentricity and its dynamic amplification in torsional response to earthquake ground motion. The numerical examples in this paper represent that the Hermite polynomial expansion technique is well applicable to the probabilistic analysis of the torsional eccenticities in comparison with Monte Caro simulation experiments. From stochastic point of veiw, it is pointed out that the static and dynamic eccentiricities caused by uncertainties of stiffness resistance and floor load distribution should be deliberated in earthquake-resistant design for buildings.
