Influence of shear studs distribution on the mechanical behaviour of dissipative hybrid steel frames with r.c. infill walls

Morelli, Francesco; Mussini, Nicola; Salvatore, Walter

doi:10.1007/s10518-018-0475-9

Cited by 8 publications

(18 citation statements)

References 28 publications

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“…The mechanical behaviour of dissipative SRCWs is strongly influenced by the disposition of the shear studs (Dall'Asta et al 2017;Morelli et al 2019). These studies analyzed numerically and experimentally two configurations of dissipative SRCW system, one representative of an integral infill frame and one of a non-integral infill frame, and 6 configurations representative of semi-integral frames only through numerical models.…”

Section: Review Of the Studies On Of The Dissipative Srcwsmentioning

confidence: 99%

“…However, several past studies demonstrated, both experimentally and numerically, that the resisting mechanism of dissipative (Morelli et al 2019) and traditional SRCWs (Liauw and Lee 1977;Liauw 1979;Te-Chang and Kwok-Hung 1984;Liauw and Kwan 1985a;Pallarés et al 2020a, b) is strongly influenced in the in-plane loading direction by the effectiveness of shear studs distribution, proposing to divide them into three categories: the integral, non-integral and semi-integral infill frames. In the first case the shear studs are distributed all along the steel frame, in the second the influence of shear studs, if there are any, is completely negligible, and the last case represents an intermediate situation.…”

Section: Introductionmentioning

confidence: 99%

“…The same authors showed that among the three different types of infilled frames the integral infilled frames provide higher stiffness, strength and ductility. Morelli et al (2019) studied the influence of the shear studs on the dissipative SRCW proposed by Dall'Asta et al (2017) through detailed finite element models, showing that also in the case of dissipative SRCW, the integral, non-integral and semi-integral infill frames are characterized by deep differences, both in terms of global capacity and of failure mechanism. These studies showed that assumption of a resisting mechanism based simply on the formation of a diagonal strut, neglecting the influence of the shear studs distribution (Dall'Asta et al 2017), leads to the underestimation of the resistance of integral and semiintegral infill frames.…”

Section: Introductionmentioning

confidence: 99%

“…To develop the component based mechanical model, firstly, numerical analyses are carried out adopting a 3D refined Finite Element (FE) model. These analyses, together with the experimental results described in (Dall'Asta et al 2015 andMorelli et al 2019), allow to identify the components needed for the development of the mechanical model. The behaviour of each component is then represented by force-displacement laws already present in the technical and scientific literature and, where necessary, calibrated on the base of the experimental and numerical results.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2 schematically resumes the methodology followed. For the development of the whole component based mechanical model a total of 11 different SRCWs configurations are considered, including the 2 experimentally tested in (Dall'Asta et al 2015), the 6 numerically studied in (Morelli et al 2019) Fig. 2 Global methodology adopted for the development, calibration, and validation of the mechanical model and further 3 new configurations, covering therefore all the possible main shear studs distributions for the SRCW systems.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical model of steel frames with reinforced concrete infill walls

Morelli

Panzera

Salvatore

2021

Bull Earthquake Eng

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This paper presents a mechanical model developed for the simulation of the monotonic behaviour of Steel frames with Reinforced Concrete infill Walls (SRCW). In particular, it deals with a specific typology of SRCW, obtained from the classical one through the interposition of dissipative elements in the columns and by stiffening and shaping the steel frame’s corners in a way to prevent the brittle failure of the concrete in compression. This system has demonstrated in past researches to be able to overcome the typical problems of SRCWs and to assure, through a capacity design approach, a global ductile behavior. The selection of the main components to be included in the model is carried out on the base of the analysis of the available experimental tests and of the results of accurate 3D Finite Element model analyses. The behaviour of each component is represented though consolidated models present in the current state-of-the-art and, where necessary, calibrated using the results of the experimental and numerical analyses. The capacity of the proposed mechanical model in representing the global behaviour of the SRCWs is finally demonstrated comparing the results in terms of force–displacement curves with the ones obtained through the refined 3D Finite Element models.

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Section: Review Of the Studies On Of The Dissipative Srcwsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanical model of steel frames with reinforced concrete infill walls

Morelli

Panzera

Salvatore

2021

Bull Earthquake Eng

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Seismic design of innovative steel frames with partially‐prefabricated infill walls

et al. 2021

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Hybrid steel and concrete seismic‐resistant systems made by steel frames with reinforced concrete infill walls (SRCWs) have potential advantages over structural solutions made only by steel or reinforced concrete (RC). In fact, the high initial stiffness of concrete is useful to minimize the damage of non‐structural elements under frequent (low to moderate) earthquakes while the ductility and dissipative capacity of the steel allow good performances under rare (high‐intensity) events. Eurocode 8 considers SRCW systems to behave essentially as RC walls. However, numerical analyses on SRCWs, designed according to the Eurocodes, pointed out an unsatisfactory seismic behaviour with discrepancies between the behaviour assumed in the design and the simulated response under seismic actions. Indeed, the idea of stiffening a steel frame with a RC infill leads complex mechanisms that are difficult to control as being affected by many variables. In this study, some of the recent developments made for innovative SRCW are transferred to hybrid steel and concrete walls with partially‐prefabricated infills. Numerical models are analysed to understand the global behaviour of the considered SRCWs and to provide a preliminary validation of the proposed structural solution.

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