Experimental and analytical characterization of steel shear links for seismic energy dissipation

Nuzzo, Iolanda; Losanno, Daniele; Caterino, Nicola; Serino, Giorgio; Rotondo, Luis M. Bozzo

doi:10.1016/j.engstruct.2018.06.005

Cited by 55 publications

(29 citation statements)

References 16 publications

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“…For more details about the design and testing of UFP dampers, please refer to Ponzo et al (2019). The proposed procedure is valid also for shear link devices, such as those proposed by Nuzzo et al (2018), as an alternative to UFP dampers if they do not modify the pattern of vertical loads in the beam. The design assumptions have been verified through non-linear time history analyses performed considering the numerical model of Figure 6 and the input motions of Figure 5, as reported in the following paragraph.…”

Section: Are Summarized Inmentioning

confidence: 99%

Seismic Design and Testing of Post-tensioned Timber Buildings With Dissipative Bracing Systems

Ponzo

Cesare

Lamarucciola

et al. 2019

Front. Built Environ.

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This paper describes a seismic design procedure for low-damage buildings composed by post-tensioned timber framed structures coupled with hysteretic dissipative bracing systems. The main goal of the design procedure is preventing or limiting earthquake-induced damage to the structural and non-structural elements. For this aim, a target design displacement is defined according to the desired performance level. Then, the corresponding design force, strength, and stiffness of the post-tensioning and of the dissipative braces are evaluated in order to size post-tensioned connections and dissipating devices. The results of shaking table testing performed at the University of Basilicata are also reported. A prototype model −2/3 scaled, three-dimensional, and three stories with a post-tensioned timber structure without and with V-inverted braces and U-shaped flexural steel dampers-has been extensively tested. During testing, the specimen was subjected to a set of seven earthquakes at different intensity levels of the peak ground acceleration. The effectiveness of the bracing system and the reliability of the proposed procedure are experimentally demonstrated. Non-linear dynamic analyses have been performed in order to simulate the experimental seismic response. The numerical model is based on a lumped plasticity approach, which combines the use of elastic elements with linear and rotational springs representing energy dissipating devices and plastic rotations of the connections. The numerical results accurately predict the non-linear behavior of the prototype model, obtaining a satisfactory matching with the target drift considered for design.

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Section: Are Summarized Inmentioning

confidence: 99%

Seismic Design and Testing of Post-tensioned Timber Buildings With Dissipative Bracing Systems

Ponzo

Cesare

Lamarucciola

et al. 2019

Front. Built Environ.

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“…3. It must be noted that developments on steel profile optimization have been also involved in earthquake engineering [4]. The proposed CFP has been obtained through a multi-criteria process that took into account the objectives described below:…”

Section: System Descriptionmentioning

confidence: 99%

“…1) Flexural capacity: considering a common span of 5m (column-column distance for housing project), the flexural demand of the CFS has been set equal to 30kNm for a 1m-width slab under service loads with the corresponding mid-span deflection not exceeding the Eurocode limit [4], i.e. span length/500.…”

Section: System Descriptionmentioning

confidence: 99%

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A Novel Steel-Concrete Composite Flooring System: Development and Preliminary Experimental Investigation

Giacinto¹,

Losanno²,

Ruocco³

et al. 2019

World Congress on Civil, Structural, and Environmental Engineering

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A new steel-concrete composite system is herein proposed to achieve a stronger, more ductile, and more economical flooring solution. The system consists of a smooth cold-formed steel profile fully embedded into a concrete pouring; Expanded Polystyrene (EPS) or hollow blocks are interposed between the steel profiles in order to lighten the slab weight. The system relies on particular shape and web holes only to achieve vertical interlocking and bonding resistance between concrete and cold-formed profile. The profile's shape has been properly designed through a multi-objective optimization process considering flexural performance, selfsupporting capacity, manufacturability, ease of installation, and compatibility with existing technologies. An experimental testing campaign on full-scale specimens has been carried out to investigate the flexural capacity of the system up to failure.

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“…In this work, the fragility curve of the SL damper is constructed. This device, consisting in a steel plate milled in correspondence of its web, where energy dissipation is concentrated, has been recently object of a wide experimental campaign [16]. Gathered data are used in order to get the corresponding fragility curve.…”

Section: Introductionmentioning

confidence: 99%

Case-Study of a Cost-Based Seismic Design for a R.C. Frame With Additional Dissipative Brace Systems

Nuzzo¹

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The employment of cost-based design framework in seismic engineering is an important issue researchers are dealing with in last years. It mainly assumes loss indicators as design parameters, aiming to make a designer having greater consciousness about losses to expect due to seismic loads. In the state-of-art there are many proposals of loss-based seismic design methods. As well, it is possible to read about loss assessment analysis of several case-study systems. Although, very poor indications are provided about loss assessment of structural systems equipped with dissipative braces, that today represent a valid seismic design alternative. This work aims to present a case-study structure of a reinforced concrete building equipped with shear link dampers supported by a bracing system. The loss assessment analysis of the structure is realized through the use of PACT software (FEMA P58). The shear link's fragility curve is constructed starting from experimental test results, while the corresponding repair cost curve is generated through engineering judgment. Main loss results are commented and analyzed in the view of implementing a cost-based design framework.

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Experimental and analytical characterization of steel shear links for seismic energy dissipation

Cited by 55 publications

References 16 publications

Seismic Design and Testing of Post-tensioned Timber Buildings With Dissipative Bracing Systems

Seismic Design and Testing of Post-tensioned Timber Buildings With Dissipative Bracing Systems

A Novel Steel-Concrete Composite Flooring System: Development and Preliminary Experimental Investigation

Case-Study of a Cost-Based Seismic Design for a R.C. Frame With Additional Dissipative Brace Systems

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