SHAKING TABLE EXPERIMENTAL STUDY ON AN IRREGULAR TALL BUILDING STRUCTURE

Based on a shaking table experiment of 1∶25 scale irregular frame-shearwall structure model,the dynamic characteristics,seismic responses in elastic and elastic-plastic phases,and destructive forms of the structure were studied.It was observed that cracks developed with earthquake wave acceleration increasing,but no severe crack is developed in the structure during the experiment,the stiffness of the structure is weakened quickly.In the seismic responses caused by artificial wave,site wave and El Centro wave,that caused by the artificial wave is the most intense one.Torsion of the structure is heavier beacause of declination between center of mass and siffness.So stiffness of tube shearwall should be reinforced to improve its ductileness.