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Macroelement Model for the Progressive-Collapse Analysis of Infilled Frames
| 题名： | Macroelement Model for the Progressive-Collapse Analysis of Infilled Frames |
| 正文语种： | eng |
| 作者： | Di Trapani, Fabio;Tomaselli, Giovanni;Cavaleri, Liborio;Bertagnoli, Gabriele |
| 作者单位： | Politecn Torino Dipartimento Ingn Strutturale Edile & Geotecn Corso Duca Abruzzi 24 I-10129 Turin Italy;Politecn Torino Dipartimento Ingn Strutturale Edile & Geotecn Corso Duca Abruzzi 24 I-10129 Turin Italy;Univ Palermo Dipartimento Ingn Viale Sci I-90128 Palermo Italy;Politecn Torino Dipartimento Ingn Strutturale Edile & Geotecn Corso Duca Abruzzi 24 I-10129 Turin Italy |
| 关键词： | Progressive collapse;Robustness;Infilled frames;Reinforced concrete;OpenSees |
| 摘要： | A new multistrut macromodel for the analysis of the progressive-collapse response of infilled reinforced concrete (RC) frames is presented in this paper. The model consists of three struts: two outer infinitely rigid and resistant struts and one inner fiber-section strut. The inclination of the struts as well as the stress-strain response are modulated by two parameters that are obtained by means of analytical correlations provided in the paper. The latter link the geometric and mechanical properties of an infilled frame to the geometric configuration and mechanical response of the equivalent strut model. This confers the model the capability to adapt to consider different collapse configurations. The analytical correlations are obtained from an experimental data set of pushdown tests, enlarged with data from refined finite-element (FE) simulations. Validation tests are finally carried out comparing the model prediction with results of experimental and FE pushdown tests not considered for the definition of the empirical database. Results show that, because of its flexibility, the model is sufficiently reliable and, at the same time, of simple implementation in FE analysis software to perform progressive-collapse simulations. (C) 2021 American Society of Civil Engineers. |
| 出版年： | 2021 |
| 期刊名称： | Journal of structural engineering |
| 卷： | 147 |
| 期： | 6 |
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