Seismic fragility functions for Portuguese RC precast buildings

Abstract

Fragility functions are fundamental for the assessment of seismic safety of structures or the loss assessment of a portfolio of assets. The present paper describes a procedure to derive fragility functions representative of Portuguese reinforced concrete precast buildings. This goal was achieved following an analytical methodology considering the result of hundreds of nonlinear static analyses, whose building models reflect both mechanical and geometrical characteristics of the Portuguese industrial building stock. Considering the specificities of this typology, and in particular the connections between the structural members, a recently developed macro-element was employed, which enables the explicit simulation of friction and dowel mechanisms. The fragility analyses considered both structural and nonstructural limit states, and the findings indicate a poor seismic performance, even under low seismic demand.

Influence of Beam-to-Column Connections in the Seismic Performance of Precast Concrete Industrial Facilities

“…The values corresponding to the yielding (u y , F y ) and maximum (u max , F max ) strength are determined with expressions ( 4) to (7), following the studies of Refs. [ 37,38,1]: 4)…”

“…Precast reinforced concrete (PRC) structures have shown poor seismic performance in several cases, presenting damage to structural and non-structural elements, and highlighting the vulnerability of industrial buildings. 1,[2][3][4][5][6][7] An important part of these buildings was not designed with seismic concerns. Most of the observed damage is related to structural elements, namely in the beam-to-column connections.…”

Modelling and Seismic Response Analysis of Non-residential Single-storey Existing Precast Buildings in Italy

“…The major seismic vulnerabilities in precast industrial buildings were highlighted during past earthquakes and well documented in the literature (Belleri et al, 2015a;Belleri et al, 2015b;Casotto et al, 2015;Ercolino et al, 2016;Bournas et al, 2014;Minghini et al, 2016;Nastri et al, 2017;Palanci et al, 2017;Savoia et al, 2012;Toniolo and Colombo, 2012;Biondini and Toniolo, 2009). Typical observed collapses were related to the loss of support of roofing elements and/or beams, overturning of cladding panels, and failures at the beam-column joint, such as dowel failure or RC forks out-of-plane failure (Brunesi et al, 2015;Belleri et al, 2016;Belleri et al, 2017;Scotta et al, 2015;Colombo et al 2016;Demartino et al 2018;Torquati et al, 2018;Ercolino et al, 2018;Bosio et al al., 2020;Sousa et al, 2020b).…”

Cyclic behaviour of precast beam‐to‐column connections with low seismic detailing

“…After the literature review and considering the specific properties of the industrial building stock, [11][12][13][14] it was noticed that there was a lack of study of the connections without any mechanical device, named as pure friction connections and, since it will be studying the connections that typically reflect the connections found throughout Europe, also the dowel connections will be studied, as described in the next section.…”