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.

Macroelement Model for the Progressive-Collapse Analysis of Infilled Frames / Di Trapani, F.; Tomaselli, G.; Cavaleri, L.; Bertagnoli, G.. - In: JOURNAL OF STRUCTURAL ENGINEERING. - ISSN 0733-9445. - STAMPA. - 147:6(2021), pp. 1-19. [10.1061/(ASCE)ST.1943-541X.0003014]

Macroelement Model for the Progressive-Collapse Analysis of Infilled Frames

Di Trapani F.;Tomaselli G.;Cavaleri L.;Bertagnoli G.
2021

Abstract

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.
File in questo prodotto:
File Dimensione Formato  
37. MACRO-ELEMENT ASCE.pdf

non disponibili

Descrizione: articolo
Tipologia: 2a Post-print versione editoriale / Version of Record
Licenza: Non Pubblico - Accesso privato/ristretto
Dimensione 2.66 MB
Formato Adobe PDF
2.66 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2904494