EFFECT OF DIFFERENT TYPES OF NEAR-FAULT PULSE GROUND MOTION ON FRAME-SHEAR WALL STRUCTURE

Near-fault pulse ground motion has large potential damage effect on structure. In order to analyze the effect of this kind of ground motion on frame-shear wall structures, near-fault double-pulse-type and multi-pulse-type ground motion are collected. Their elastic acceleration response spectra and the time history response of a 22-floor concrete reinforced frame-shear wall structure induced by them are calculated. The average elastic acceleration response spectra of the near-fault double-pulse-type ground motion is compared with that of the multi-pulse-type ground motion. The average base shear, the average maximum storey-drift-angle, the average top floor displacement, and the average whole structure damage index induced by the near-fault double-pulse-type ground motion are also compared with those induced by the multi-pulse-type ground motion. The results show: the average elastic acceleration response spectra of the near-fault double-pulse-type ground motion is similar to or larger than that of the multi-pulse-type ground motion; the average base shear, the average maximum floor displacement, the average top floor displacement, and the average whole structure damage index induced by the near-fault double-pulse-type ground motion are no less than those induced by the multi-pulse-type ground motion. Therefore, in a statistical sense, only near-fault double-pulse-type ground motion should be considered in approximately analyzing the effects of near-fault pulse ground motion on frame-shear wall structures.