Modelling of in-plane seismic behaviour of one-way steel or timber jack arch floors in existing buildings. Application to the Eixample district of Barcelona. (1st July 2022)

• Record Type: Journal Article
• Authors: Dimovska, Sara; Saloustros, Savvas; Pelà, Luca; Roca, Pere
• Is Part Of: Engineering structures. Volume 262(2022)
• Publication Date: 2022-07-01
• Subjects: One-way Floor -- Orthotropic Floor -- Steel Beam -- Timber Beam -- Tile Vault -- In-plane Stiffness -- Unreinforced Masonry Building -- Finite Element Analysis -- Pushover Analysis -- Seismic Vulnerability; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2022.114343
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Novel method for simplified 2D shell modelling of one-way jack arch floors. 2D elastic orthotropic shell properties are calibrated via an iterative procedure. Calibration based on comparisons with detailed nonlinear 3D floor modelling. Application to timber/steel and tile vault floors of Eixample district, Barcelona. Seismic performance analysis of an Eixample building with two different floors. Abstract: The type of floor system has a decisive role in the seismic performance of unreinforced masonry buildings. The in-plane stiffness of the floors has to be adequately represented in the numerical modelling of existing buildings, as it can influence their seismic capacity. This paper investigates the seismic behaviour of one-way arch floor systems composed of steel or timber beams, and ceramic tile vaults. The main objective of the research is to provide a numerical procedure for the simplified modelling of jack arch floor systems in the seismic assessment of unreinforced masonry buildings. The presented approach aims to provide values for the orthotropic properties of simplified floor models composed of elastic 2D shell elements. The orthotropic elastic properties are computed and calibrated by means of comparisons with detailed 3D nonlinear models of the floors. The case study is a multi-storey existing masonry building of the historical "Eixample" district in Barcelona, which includes one-way arch floor systems. The Finite Element Method has been used for the numerical simulation of the seismic performance through nonlinear static (pushover) analyses. The results of the study contribute to a better understanding of the effect of the behaviour of one-way floors with steel or timber beams and tile vaults on the seismic response of masonry buildings. This work provides indicative values for the proper modelling of these particular floor slabs. The proposed methodology is also applicable to the numerical simulation of any other one-way floor system.