Mainshock-aftershock damage assessment of infilled RC structures. (15th November 2018)

• Record Type: Journal Article
• Authors: Furtado, André; Rodrigues, Hugo; Varum, Humberto; Arêde, António
• Is Part Of: Engineering structures. Volume 175(2018)
• Page Start: 645
• Page End: 660
• Publication Date: 2018-11-15
• Subjects: RC structure -- Masonry infill walls -- Numerical modelling -- Mainshock-aftershock -- 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.2018.08.063
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Seismic vulnerability assessment of RC infilled structures due to mainshock-aftershock impacts. Study of a RC bare frame, full infill with and without out-of-plane behaviour. The seismic vulnerability assessment methodologies for undamaged and damages structures is presented. Undamaged structures: Higher seismic vulnerability of infilled RC structures considering combined in-plane and out-of-plane behaviour. Damaged structures: higher vulnerability of bare frame structures. Abstract: The primary objective of this manuscript is to present a numerical study regarding the mainshock-aftershock damage assessment of infilled reinforced concrete (RC) structures. For this, an 8 storey building was built in the OpenSees software considering different modelling strategies: (i) RC structure without infill masonry walls; (ii) RC structure with infill walls considering only the in-plane behaviour; and (iii) RC structure with infill walls considering the combined in-plane and out-of-plane non-linear behaviour. Two different approaches are proposed to assess the seismic vulnerability of undamaged and damaged structures due to mainshock-aftershock sequences. Both methodologies are described throughout the manuscript. Incremental dynamic analysis were carried out to achieve fragility curves for different damage states of the structures. A comparison between the undamaged and damaged structures' fragility curves will be presented and discussed which will allow to assess the effect of the mainshock-aftershock. Furthermore, the effect of the infill walls presence and the consideration of the combined in-plane and out-of-plane behaviour will be discussed.