Loading...

Effects of support conditions and arrangement of prestressed rocking columns on the displacement of concrete frames under dynamic loads

Khodabakhshi, N ; Sharif University of Technology | 2022

69 Viewed
  1. Type of Document: Article
  2. DOI: 10.1007/s10518-022-01365-4
  3. Publisher: Springer Science and Business Media B.V , 2022
  4. Abstract:
  5. 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. © 2022, The Author(s), under exclusive licence to Springer Nature B.V
  6. Keywords:
  7. Finite element analysis ; Rocking column ; Seismic loading ; Concrete beams and girders ; Concrete construction ; Dynamic loads ; Earthquakes ; Prestressed concrete ; Reinforced concrete ; Concrete column ; Concrete frame ; Finite element analyse ; Fixed base ; Pre-stressed ; Residual displacement ; Rocking columns ; Seismic loadings ; Self centering ; Self-centering concrete column ; Finite element method ; Displacement ; Ground motion
  8. Source: Bulletin of Earthquake Engineering ; Volume 20, Issue 8 , 2022 , Pages 4175-4212 ; 1570761X (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s10518-022-01365-4