1. Effects of support conditions and arrangement of prestressed rocking columns on the displacement of concrete frames under dynamic loads.
- Author
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Khodabakhshi, Nahid and Khaloo, Alireza
- Subjects
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CONCRETE columns , *EARTHQUAKE resistant design , *DYNAMIC loads , *REINFORCED concrete , *FINITE element method , *GROUND motion - Abstract
In this paper, the effects of rocking and fixed base prestressed columns and conventional reinforced concrete columns on the response of frames are investigated. Also, the influence of some selected rocking base prestressed columns on the response of the concrete frame was studied. Three types of a concrete frame with conventional Reinforced Concrete columns, rocking, and fixed base prestressed columns were modeled using the finite element method in Opensees software. The details of the simulation of the rocking and fixed base columns in Opensees are described precisely. The results obtained from the models were compared with those of the literature to evaluate the validity of the results. Ten ground motion records were applied to the frames to investigate the frame responses under different earthquakes. In this regard, 350 nonlinear dynamic analyses were carried out. The obtained results indicate that rocking frames experience more maximum displacement than RC frames. However, rocking columns decrease residual displacement with respect to RC columns. In the low seismic region, when the rocking columns were placed in the middle of the frame, the residual displacement of the frame was decreased significantly. On the other hand, in the areas with moderate and high seismicity, the performance of the frame with rocking columns located on the sides of the frame was improved. Moreover, the arrangement of the rocking frames has a considerable effect on the concrete frame responses. However, there is a negligible difference in concrete frame responses with the different prestressed stories. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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