STUDY ON VERTICAL SEISMIC ACTION AND SHAKING TABLE TEST OF GUARDIAN ART CENTER

The Guardian Art Center is a complex structure with large cantilevers and large span transfer trusses. To ensure its aseismic safety, a 1:16 scaled shaking table test is carried out and the corresponding nonlinear time history analysis is conducted by using ABAQUS. The dynamic characteristics of the structure are studied firstly, and then the acceleration, displacement, frequency, and damage process are studied in both horizontal and vertical directions due to the rare earthquake of 8-degree fortification and the rare earthquake of 9-degree fortification. Finally, the calculation methods of vertical seismic action of a cantilever truss and a long span transfer truss are discussed. The results show that the structure has the great capacity of deformation and ductility and enough collapse margin ratio to meet the requirements of the ‘damage not occur under frequency earthquake, damage is repairable under moderate earthquake, and collapse not occur under rare earthquake’. The vertical seismic action calculated by the vertical mode decomposition response spectrum method is not necessarily larger than the result of the simplified method, and the two envelopes should be adopted in an actual design. For the studied complex structure with a large cantilever truss and a long-span transfer truss, the vertical seismic action calculated by the simplified method is smaller than the experimental result. Hence, 15% of the seismic weight is suggested to calculate the vertical seismic action.