Analysis and comparison of two different configurations of external dissipative systems

Gioiella, Laura; Tubaldi, Enrico; Gara, Fabrizio; Dezi, Luigino; Dall’Asta, Andrea

doi:10.1016/j.proeng.2017.09.207

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…The problem can be solved in the frequency-domain, rather than in the time-domain [32]. It is noteworthy that resorting to the frequency-domain has the advantage of allowing for a condensed description of the seismic problem, in terms of the active degrees of freedom only.…”

Section: Stochastic Formulation Of the Seismic Problemmentioning

confidence: 99%

Stochastic Seismic Analysis and Comparison of Alternative External Dissipative Systems

Gioiella

Tubaldi

Gara

et al. 2018

Shock and Vibration

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This paper deals with the seismic retrofit of existing frames by means of external passive dissipative systems. Available in different configurations, these systems allow high flexibility in controlling the structural behaviour and are characterized by some feasibility advantages with respect to dissipative devices installed within existing frames. In particular, this study analyzes and compares the performances of two external solutions using linear viscous dampers. The first is based on the coupling of the building with an external fixed-based steel braced frame by means of dampers placed horizontally at the floor levels. The second is an innovative one, based on coupling the building with a "dissipative tower," which is a steel braced frame hinged at the foundation level, and activating the dampers through its rocking motion. The effectiveness of the two solutions is evaluated and compared by considering a benchmark existing reinforced concrete building, employing a stochastic dynamic approach, under the assumption of linear elastic behaviour for the seismic performance evaluation. This allows efficiently estimating the statistics of many response parameters of interest for the performance assessment and thus carrying out extensive parametric analyses for different properties of the external systems. The study results provide useful information regarding the design and the relative efficiency of the proposed retrofit solutions.

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Section: Stochastic Formulation Of the Seismic Problemmentioning

confidence: 99%

Stochastic Seismic Analysis and Comparison of Alternative External Dissipative Systems

Gioiella

Tubaldi

Gara

et al. 2018

Shock and Vibration

Self Cite

View full text Add to dashboard Cite

show abstract

“…Implementing external dissipative structures involves constructing new foundations and placing dissipative devices outside 2 of 15 the existing building, often within specially dimensioned framed constructions. Some applications have recently been developed, discussed, and realized [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Design of Additional Dissipative Structures for Seismic Retrofitting of Existing Buildings

Bergami

2024

Applied Sciences

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This paper presents an innovative approach for improving the seismic protection of existing structures by introducing an additional dissipative structure (ADS). The seismic energy impacting the building can be dissipated through the contribution provided by the ADS, thereby reducing the need for the existing building to ensure its seismic capacity. This retrofitting technique is well-suited for structures facing architectural restrictions or challenging-to-update elements. It can help to address foundational issues by applying loads to new external components. This paper describes the design of the ADS and proposes a displacement-based design procedure. The design process involves a nonlinear static analysis and a simple procedure that must be iteratively repeated until the retrofitting target is achieved. This approach is simple and computationally efficient and can also be used for complex and irregular structures. Such structures are frequently encountered, and existing structures often exhibit unusual geometries and materials requiring extensive numerical modeling. The efficacy of this technique was evaluated using the case study of a school building located in central Italy. The results of numerical analyses indicated that owing to the ADS’s contribution, the seismic capacity of both buildings was enhanced, addressing the challenges associated with complex foundational interventions.

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Design of Additional Dissipative Structures for Seismic Retro-fitting of Existing Buildings

Bergami

2023

Preprint

View full text Add to dashboard Cite

This paper presents an innovative approach for improving the seismic protection of existing structures by introducing an additional dissipative structure (ADS). The seismic energy impacting the building can be dissipated through the contribution provided by the ADS, thereby reducing the need for the existing building to ensure its own seismic capacity. This retrofitting technique is well-suited for structures facing architectural restrictions or challenging-to-update elements. It can help address foundation issues by applying loads to new external components. This paper describes the design of the ADS and proposes a displacement-based design procedure. The design process involves a non-linear static analysis and a simple procedure that must be iteratively repeated until the retrofitting target is achieved. This approach is simple and computationally efficient and can also be used for complex and irregular structures. Such structures are frequently encountered, and existing structures often exhibit unusual geometries and materials requiring extensive numerical modeling. The efficacy of the technique was evaluated using a case study involving a school building located in central Italy. The results of numerical analyses indicated that owing to the ADS’s contribution, the seismic capacity of both the buildings was enhanced, ad-dressing the challenges associated with complex foundation interventions.

show abstract

Analysis and comparison of two different configurations of external dissipative systems

Cited by 3 publications

References 14 publications

Stochastic Seismic Analysis and Comparison of Alternative External Dissipative Systems

Stochastic Seismic Analysis and Comparison of Alternative External Dissipative Systems

Design of Additional Dissipative Structures for Seismic Retrofitting of Existing Buildings

Design of Additional Dissipative Structures for Seismic Retro-fitting of Existing Buildings

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