Numerical simulation of beam-to-column connections in precast reinforced concrete buildings using fibre-based frame models

Sousa, Romain; Batalha, Nádia; Rodrigues, Hugo

doi:10.1016/j.engstruct.2019.109845

Cited by 27 publications

(21 citation statements)

References 21 publications

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“…36 mm. The OpenSees hysteretic uniaxial material model according with Sousa et al (2020) and the Modified Ibarra-Medina-Krawinkler Deterioration model (Lignos and Krawinkler, 2011) were adopted and compared. For the hysteretic uniaxial material model, the following parameters were considered (according to Fischinger et al, 2013): damage1 equal to 0, damage 2 equal to 0.06, pinchX and pinchY equals to 0.5 and beta equal to 0.…”

Section: Beam-to-column Connectionmentioning

confidence: 99%

“…Starting from the work of Bressanelli et al (2019) and Magliulo et al (2018), this research moves further by: investigating two different hysteretic models for the beam-to-column connections, such as the hysteretic uniaxial material model (Sousa et al, 2020) and the Modified Ibarra-Medina-Krawinkler Deterioration model (Lignos and Krawinkler, 2011); explicitly modelling the cladding panels in a pendulum configuration; removing the hypothesis of rigid diaphragm by introducing the roof elements and three types of beam-to-roof connections, namely hot-rolled, cold-formed and welded; explicitly modelling the overhead crane and the oscillating payload. The building collapse rates obtained from the comprehensive 3D model allowed to validate the collapse rates obtained from previous simplified analyses.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Modelling Assumptions on the Seismic Risk of Industrial Precast Concrete Structures

Bressanelli¹,

Bellotti²,

Belleri³

et al. 2021

Front. Built Environ.

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This research evaluates the influence of different modelling assumptions on the global and local seismic risk assessment of code-conforming precast reinforced concrete buildings, specifically single-story industrial buildings. In particular the modelling of the system mass, the overhead crane, the beam-to-column and roof-to-beam connections and the cladding system are investigated. For this purpose, a case study resembling a new industrial building designed in accordance with the current Italian building code was selected. Typical dowel beam-to-column connections were considered and the influence of various modelling strategies investigated: perfect hinges, linear elastic connections and non-linear connections with a degrading hysteretic force-displacement model which was calibrated from available data on experimental tests. Three different types of roof-to-beam connections were investigated removing the assumption of rigid diaphragm, namely hot-rolled, cold-formed and socket welded connections. Initially, simplified planar models of single frames were considered to evaluate the influence of the different modelling strategies, then 3D models of the entire building were analyzed. Multiple-stripe non-linear dynamic time history analyses allowed to evaluate displacements, drifts, deformations and ultimate curvatures of the main elements and connections for various intensity measure levels. The seismic risk was assessed in terms of failure rate considering the collapse of both the columns and of the connections. The results show that the beam-to-column connections fail right after reaching yielding due to their low displacement ductility, leading to the loss of support of the beam and therefore increasing the collapse rate of the investigated structural typology.

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Section: Beam-to-column Connectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Modelling Assumptions on the Seismic Risk of Industrial Precast Concrete Structures

Bressanelli¹,

Bellotti²,

Belleri³

et al. 2021

Front. Built Environ.

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“…Figure 5 shows that the difference between considering a DC and DFNC connection is inexistent, leading to a low influence of the friction and neoprene in the drift and seismic coefficient of the structure. In fact, in other studies [16], only focused in the connection level, the contribution of the friction and neoprene are evaluated around 25% of the global connection response. Both cases can be true, once in the building under study the connection does not experience a huge demand, like observed in the previous studies.…”

Section: Effect Of the Neoprene And Frictionmentioning

confidence: 99%

“…Clementi et al [9], account only for the contribution of the dowels. The macro-element adopted in the present work follows the model proposed by Sousa et al [16], which explicitly simulate the contribution of both friction and dowel action.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Seismic Behavior of an RC Precast Building

Vitorino

Batalha

Sousa

et al. 2020

Advances in Science, Technology &Amp; Innovation

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Past earthquakes brought attention to the poor performance of precast reinforced concrete structures. One of the problems observed in those structures is related to the beam-to-column connections. The evaluation of different methodologies for the analysis of beam-to-column connections in industrial buildings is an important aspect that should be studied. The numerical analyses developed allowed the study of the effect that different connection properties have on the frequencies of vibration, members drifts and seismic coefficients. The connection properties were modelled through a macro-element that considers the friction (between concrete-concrete and concrete-neoprene) and the steel dowels. The results showed that the friction between concrete elements and the consideration of the neoprene in the connection have a small impact on the drifts demands in the columns and seismic coefficient of the analyzed structure; on the other hand, the effect of the steel dowel on the drift demand and seismic coefficient is significant.The comparison of the models with different properties and connections allowed a better understanding of the factors with a higher impact on the results.

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“…Recent earthquakes and experimental tests have shown that most of the collapses of industrial single-story RC precast buildings are related to beam-to-column connection and roof-to-beam connection collapses (Arslan et al 2006;Magliulo et al 2014b;Ozden et al 2014), even though, in some cases, these buildings were designed for seismic loads. For this reason, in the last years, experimental studies have been performed to determine the capacity of the more spread connection types (Dal Lago et al 2017;Magliulo et al 2014aMagliulo et al , 2015aPsycharis and Mouzakis 2012a, b), related numerical models have been developed (Sousa et al 2020;Titi et al 2018;Zoubek et al 2013) and new connections have been proposed (Belleri et al 2013(Belleri et al , 2017Magliulo et al 2017). As a consequence, new design formulae (Zoubek et al 2015) for these connections have been provided, which are not yet included in code provisions and spread design guidelines (Fischinger et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Seismic collapse assessment of new European single-story RC precast buildings with weak connections

Cimmino

Magliulo

Manfredi

2020

Bull Earthquake Eng

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Capacity design, according to the modern seismic building codes, requires the application of specific rules and construction details in order to prevent brittle failure modes at material, element and structural level. In particular, with reference to single-story precast reinforced concrete structures with columns joined by pinned beams, the Italian seismic building code, following the Eurocode 8 general principles, requires that beam-to-column connection should be designed in order to avoid the connection failure before the formation of the plastic hinge at the column base. However, no specific details are provided in order to reach such a performance. Recent European earthquakes showed that seismic performance of beam-to-column dowel connections can be very poor. Hence, for European typical dowel beam-to-column connections, this study aims to investigate: (a) possible connection configurations obtained according to seismic design; (b) possible failure modes involving connection elements (steel dowel, transversal steel reinforcement, dowel concrete cover); (c) how available formulations are able to describe such failure modes and the related shear strength; (d) influence of connection failure on the global seismic safety at collapse of new designed single-story RC precast buildings. The reference buildings and beam-to-column connections are designed considering different geometrical layouts of the primary structure and different seismic hazard levels, i.e. four sites and two soil types. Structural capacity is estimated considering global, i.e. related to column plastic hinge degradation measured in terms of top lateral displacements, and local, i.e. related to connection shear strength, failure modes. Nonlinear multi-stripe analyses are performed for the seismic assessment.

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Numerical simulation of beam-to-column connections in precast reinforced concrete buildings using fibre-based frame models

Cited by 27 publications

References 21 publications

Influence of Modelling Assumptions on the Seismic Risk of Industrial Precast Concrete Structures

Influence of Modelling Assumptions on the Seismic Risk of Industrial Precast Concrete Structures

Assessment of Seismic Behavior of an RC Precast Building

Seismic collapse assessment of new European single-story RC precast buildings with weak connections

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