ANIDIS - L'ingegneria Sismica in Italia, ANIDIS XX - 2025

Dimensione del carattere:  Piccola  Media  Grande

Staircase Modeling Effects on the Seismic Assessment of RC Gravity Buildings

Leandro Pancottini, Marco Terrenzi, Enrico Spacone

Ultima modifica: 2025-07-21

Sommario


This paper investigates the seismic impact of modeling knee-beam staircases in an existing six-story reinforced concrete (RC) building designed for gravity loads based on 1970s Italian code. Nonlinear dynamic analyses are used to generate fragility curves for different configurations of the case study building, including bare frames and frames with centrally or corner-located staircases, with and without infills. Distributed plasticity models with fiber sections are used for the RC elements and equivalent strut-and-tie models are used for the infills. The results show that neglecting the knee-beam staircases may significantly affect the predicted seismic response and vulnerability, emphasizing the importance of their inclusion in seismic performance assessments.


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