Near‐collapse response of existing RC building under severe pulse‐type ground motion using hybrid simulation |
| |
| Authors: | Justin A Murray Mehrdad Sasani |
| |
| Affiliation: | Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, USA |
| |
| Abstract: | Column shear‐axial failure is a complex response, which lends itself to physical experimentation. Reinforced concrete structures built prior to the mid‐1970s are particularly susceptible to such failure. Shear‐axial column failure has been examined and studied at the element level, but current rehabilitation practice equates such a column failure with structural collapse, neglecting the collapse resistance of the full structural system following column failure. This system‐level response can prevent a column failure from leading to progressive collapse of the entire structure. In this study, a hybrid simulation was conducted on a representative pre‐1970s reinforced concrete frame structure under severe seismic ground motion, in which three full‐scale reinforced concrete columns were tested at the University of Illinois at Urbana Champaign. The analytical portion of the model was represented in the computer program OpenSees. Failure occurred in multiple physical specimens as a result of the ground motion, and the hybrid nature of the test allowed for observation of the system‐level response of the tested columns and the remaining structural system. The behavior of the system accounting for multiple column shear‐axial failure is discussed and characterized. Copyright © 2016 John Wiley & Sons, Ltd. |
| |
| Keywords: | near‐collapse shear‐axial failure hybrid simulation reinforced concrete existing structures seismic ground motion |
|
|
