Shaking table model test analysis of a reinforced concrete mega-frame structure without and with TMD

In order to investigate the seismic performance and damage characteristics of reinforced concrete mega-frame structure,a shaking table test model with a geometric ratio of 1∶ 25 scale was designed and fabricated. A rooftop tuned mass damper( TMD) was designed and the mega-frame structure with and without the TMD was tested on the shaking table. The deformation and acceleration responses were measured. The dynamic behavior and the damping effect with and without TMD were compared. The shaking table test results indicate that the test model suffers little damage under the design level earthquake action( peak ground acceleration of 0. 400g). It can also meet the collapse prevention requirements for severe earthquake( peak ground acceleration of 0. 880g). Therefore,the prototype structure is able to satisfy the seismic performance demand of 7-degree seismic design intensity. The TMD provides a significant vibration reduction effect.