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| Author(s): |
Margot Fabiana Pereira
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) |
| Defense date: | 2017-04-20 |
| Examining board members: |
Ana Lúcia Homce de Cresce El Debs;
Daniel de Lima Araújo;
Silvana De Nardin;
Maximiliano Malite;
Pedro Colmar Gonçalves da Silva Vellasco
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| Advisor: | Ana Lúcia Homce de Cresce El Debs |
| Abstract | |
Composite columns are structural elements made with steel profiles and concrete working together. Among these, there is the partially encased composite columns that presents advantages, such as, the possibility of pre-fabrication, reduction in the use of formwork and structural efficiency, but its fabrication process involves a laborious task that is the anchoring of the reinforcements to the steel profiles. In this context, the present work has the objective of studying the structural behavior of partially encased composite columns subjected to axial compression and eccentric compression and to evaluate the possibility of replacing conventional reinforcement with alternatives that allow a simpler execution. For this, an experimental program was developed involving 23 specimens of composite columns made with W 150 x 22.5 shape and three reinforcement configurations: welded steel mesh and fiber-added concrete. In addition, numerical simulations and a parametric study were performed using the FX + DIANA computational package in order to extrapolate the experimental results. The results show the structural behavior of columns subjected to eccentric forces depends on the axis of flexure, so that the rupture occurs more gradually when subjected to bending about the major inertia axis. In addition, similar responses were obtained for the three reinforcement configurations evaluated, and the peak load obtained for the specimens with fiber concrete was slightly lower than the others. Therefore, it can be observed that the replacement of conventional reinforcement by steel meshes or fiber concrete does not significantly alter the peak load or post-peak behavior, showing potential to be considered as a new alternative. (AU) | |
| FAPESP's process: | 14/12694-0 - Structural behavior of partially encased composite columns subjected to flexural loading |
| Grantee: | Margot Fabiana Pereira Milani |
| Support Opportunities: | Scholarships in Brazil - Doctorate |