The base-suspended pendulum isolation (BSPI) structure can isolate seismic action and reduce structural seismic response through hanging the whole structure with hanger rods set at the base. To study the aseismic performance of BSPI structure, an equivalent scaled BSPI structure model was designed and fabricated. Shaking table tests in horizontal single direction and in 3-D ones were conducted for this model, respectively. Testing design included parameters of equivalent BSPI structure model, vibration-reducing springs and dampers, test working conditions, measured points positioning and selection of exciting earthquake waves. The test results indicated that the BSPI structure has a good isolation effect under fortification and rare earthquakes; its dampers have obvious control effect on the structure’s displacement and acceleration responses; the vertical isolation measures have little effects on the structure’s horizontal seismic response. Finally, the numerical simulation was done for seismic responses of the BSPI structure. It was shown that the simulation results agree well with the test ones.
Key words
base-suspended pendulum isolation structure /
shaking table test /
damper /
vibration-reducing spring /
numerical simulation
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