Abstract：A shaking table test of complex transfinite structure with plane irregularity is carried out set against a backdrop of a practical project. The dynamic characteristics and damping ratio are examined, together with the acceleration and displacement for different seismic intensities. The failure mechanism and failure modes of the structure are studied in detail. The experiment results show that the model structure is still in elastic state under both frequently occurred and basic intensity earthquake in X direction. The fundamental natural frequency and damping ratio of the model structure in X direction is 5.610Hz and 2.995%, and that in Y direction is 5.484Hz and 2.478% respectively. Along with the increase of the acceleration amplitude, the vibration frequency of model structure has reduced while the damping ratio has increased. The vibration frequency of model structure has reduced by 15% and the damping ratio has increased to 6.531% under the rare earthquake. The maximum inter-story drift ratio of the model structure in X and Y direction are 1/1071 and 1/799 under the frequent earthquake of magnitude of 7, as well as 1/120 in Y direction under the rare earthquake. All above ratio can meet the requirements of the design code. Under the acceleration of Kobe wave of frequent earthquake, the upper floors’ maximum displacement ratio has reached 1.331 and a less irregularity torsional vibration has occurred. A rational structural design and good seismic behavior of the practical project are approved by the test. Finally, some suggestions are put forward according to the test and analysis results.
2014, Vol. 33 
