Analytical Simulation of Shake-Table Responses of a Torsionally-Eccentric Piloti-Type High-Rise RC Building Model

Abstract eng:
A series of shaking table tests on a 1:12 scale model using scaled Taft N21E earthquake records were conducted to investigate the seismic performance of a 17-story high-rise reinforced concrete building structure with a high degree of torsional eccentricity and soft-story irregularities in the bottom two stories. The main characteristics of behaviors were: (1) The sudden change of the predominant vibration mode from the mode of translation and torsion to the torsional mode after the flexible side underwent large inelastic deformation. (2) The abrupt increase in the torsional stiffness in this change of modes. (3) The warping behavior of wall in the torsional mode. And (4) the unilateral overturning moment in the direction transverse to the table excitations. In this study, efforts were devoted to simulate the above characteristics using a nonlinear analysis program, Perform3D. The advantages and limitations are presented with the nonlinear models available in this software as they are related to the correlation between analysis and test results.

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