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Abstract:
Commonly there are two structure types for the concrete structure with isolation on the first floor column top, the one with frame column and straining beam and the one with independent column.In order to validate the safety of this type of structure and give suggestion on selecting the structure type of the bottom floor, a shaking table test was carried out.By taken into account the two structural on the bottom floor, the acceleration and displacement responses are analyzed when subjected to different seismic loads with different amplitudes, especially for the different seismic response of the bottom structure.The test model is derived from a typical across horizontal frame of a practical structure.Two types of the isolated scaled models, as well as the aseismic scaled model are built for a comparative study.The test results show that for both isolated models, the reduction of the acceleration and displacement responses on top of the models is remarkable.Poor control effectiveness is observed for the acceleration responses on the bottom floor, while the reduction on the displacement responses is obvious.These results indicate that if this kinds of bottom story capital isolation structure is designed according to the Chinese code GB 50011-2010, the aseismic safety can be guaranteed even under severe earthquake inputs.The numerical results show that the independent column will induce a large elastic-plastic deformation when the stiffness of the bottom column is reduced to the same value of the aseismic model.It is also proved that the frame column with straining beam is more effective on improving the control effectiveness of bottom story drift than the independent column scheme.If independent column structure is chosen in practical project application, the stiffness of the column should be increased to some extent. © 2017, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.
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Journal of Basic Science and Engineering
ISSN: 1005-0930
CN: 11-3242/TB
Year: 2017
Issue: 3
Volume: 25
Page: 521-534
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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