Ductile design of innovative steel and concrete hybrid coupled walls

Zona, Alessandro; Degée, Hervé; Leoni, Graziano; Dall’Asta, Andrea

doi:10.1016/j.jcsr.2015.10.017

Cited by 31 publications

(51 citation statements)

References 12 publications

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“…A ductile design procedure was recently proposed [4] in order to accomplish a seismic resistant behaviour where yielding of a large number of the replaceable steel links occurs while the RC wall is still undamaged. The main design parameter is the coupling ratio (CR), i.e.…”

Section: Design Approachmentioning

confidence: 99%

“…The gravityresistant frame is connected to the HCWs systems that are the only components providing the lateral resistance against horizontal actions. The seismic-resistant mechanism of the HCWs is designed according to the performance-based ductile design procedure [4] and the spectrum for ground type A of Eurocode 8 [6] with design peak ground acceleration (PGA) a g = 0.20 g is considered as seismic input. A uniform distribution of dissipative steel links along the HCW height is adopted with the cross sections selected among the commercial European IPE hot-rolled profiles, all compact cross sections Class 1 in bending as per Eurocode 3 [5].…”

Section: Designed Casesmentioning

confidence: 99%

“…Among the various models presented in the literature for RC wall whose behaviour is dominated by flexure, as is the case of the RC wall in the considered HCW being its aspect ratio, i.e. ratio between the overall height H w and the base length l w , equal to 10 as suggested in [4], a force-based frame element with fibre cross section integration is commonly considered as the most effective option [14]. For this reason, the force-based distributed-plasticity fibre frame element available in OpenSees is employed in this study to describe the flexural behaviour of the RC wall while the shear behaviour of the RC wall elements is modelled as linear elastic due to its over-strength in shear.…”

Section: Model Of the Rc Wallmentioning

confidence: 99%

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11.18: Seismic analysis of innovative hybrid steel concrete coupled walls

2017

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An innovative hybrid steel concrete coupled wall made by a single reinforced concrete wall connected to two steel side columns by means of dissipative steel links is considered in this study. Such a hybrid system is conceived to take advantage of the stiffness of the reinforced concrete wall and of the dissipation capacity of the steel links acting as dissipative fuses that can be replaced if damaged. The performance of the studied structural system under seismic conditions is assessed by means of multi-record nonlinear incremental dynamic analysis. To this end a set of buildings is designed following a recently proposed ductile design approach and varying two parameters: the building height and the degree of coupling between the steel columns and the reinforced concrete wall. A material and geometric nonlinear finite element model developed within an open source software is introduced and the main results of the numerical analyses are presented to provide insight into the expected seismic response. Overall, the outcomes of the numerically simulated response results indicate that the proposed hybrid steel concrete coupled wall has interesting potentialities as seismic resisting system being able to effectively exploit the lateral stiffness of the RC wall as well as the dissipation capacity of the steel links.

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Section: Design Approachmentioning

confidence: 99%

Section: Designed Casesmentioning

confidence: 99%

Section: Model Of the Rc Wallmentioning

confidence: 99%

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11.18: Seismic analysis of innovative hybrid steel concrete coupled walls

2017

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“…So, to further improve the combination of the RC wall and steel elements, a new innovative HCW system as shown in Fig. 1c was proposed in the research project INNO-HYCO [7] funded by the European Commission, which provided some encouraging results [8]. This system consists of a reinforced concrete shear wall with dissipative steel links and steel side columns.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, part of this investigation focuses on optimizing the design of the innovative HCW systems by incorporating steel links as shear critical elements (SCSL) which has been proved to be better energy dissipation devices [9,10]. So, the newly suggested modification in the previously proposed ZDLD design approach [8] is such that the reinforced concrete wall should remain in the elastic range (or should undergo limited damages) while the steel links connected to the wall should be the only (or main) dissipative elements and undergo ultimate shear deformations prior to any damage in the RC wall. This research aims to modify the ZDLD design procedure [8] by integrating a mathematically derived relationship between the flange thickness, web thickness, flange width, total depth of the link section and the link length to design the links as shear critical.…”

Section: Introductionmentioning

confidence: 99%

11.33: Performance evaluation of an innovative HCW system with Shear Dissipative Links

et al. 2017

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This paper presents an improved approach to a newly suggested design procedure of an innovative Hybrid Coupled Wall (HCW) system. This system consists of a reinforced concrete (RC) shear wall with dissipative steel links and steel side columns, where the RC wall carries almost all the horizontal shear force while the overturning moments are partially resisted by an axial compression-tension couple developed by the two side steel columns rather than by the individual flexural action of the wall alone. The design objective is to reduce or possibly avoid the damage in the RC wall while concentrating the seismic damage to the replaceable steel links which are shear critical, i.e. intended to fail in shear rather than flexure. This increases the energy dissipation ability of the whole system and thus improves its resistance towards seismic ground motion. This present piece of investigation also aims to bring clarity to some important points such as: definition of an efficient coupling ratio with or without uniform link distribution, lower and upper limits of the coupling ratio compatible with the assumed link distributions, relationship between the coupling ratio and the total building height. The proposed design procedure is applied to case studies considering various assumptions for the design parameters. The designed solutions are analysed through several nonlinear finite element models in order to evaluate the results of the design methodology and provide useful information on the ductility capacity of the proposed innovative HCW system for different coupling ratios and efficient energy dissipation characteristics of the shear links.

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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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Ductile design of innovative steel and concrete hybrid coupled walls

Cited by 31 publications

References 12 publications

11.18: Seismic analysis of innovative hybrid steel concrete coupled walls

11.18: Seismic analysis of innovative hybrid steel concrete coupled walls

11.33: Performance evaluation of an innovative HCW system with Shear Dissipative Links

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

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