Experimental and analytical investigation of the inelastic behavior of structures isolated using friction pendulum bearings

Tsiavos, Anastasios; Schlatter, David; Markić, Tomislav; Stojadinović, Božidar

doi:10.1016/j.proeng.2017.09.047

Cited by 11 publications

(7 citation statements)

References 12 publications

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“…17, the minor increase of the coefficient of the interface in this case led to a smaller sliding displacement for the specimen with more mass in one direction (between t = 10.5 s and t = 11.5 s), which triggered a higher sliding displacement of the specimen with more mass in the other direction. This high sliding displacement of structures subjected to long-period pulses has been experimentally demonstrated by Tsiavos et al (2013Tsiavos et al ( , 2017Tsiavos et al ( , 2021bTsiavos et al ( , 2021c and analytically by Güneş (2022). The insignificant residual sliding displacement of 5 mm in this case demonstrates the efficiency of the lowcost and sustainable energy dissipation device to recenter the structure back to its original position after the end of the excitation for this increased value of the top mass.…”

Section: Influence Of Added Mass On the Responsesupporting

confidence: 69%

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Tsiavos

Kolyfetis

Panzarasa

et al. 2022

Bull Earthquake Eng

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SummaryThe aim of this paper is to demonstrate the efficiency of a low-cost and sustainable timber-based energy dissipation system with recentering ability, which can be used as a seismic isolation system or a tuned mass damper for the seismic protection of structures in developing or developed countries. The system, defined as Dovetail with SPrings (Dove-SP), utilizes the attractive properties of timber to store CO2, thus reducing the carbon footprint of the existing energy dissipation systems: It comprises two timber slabs that are designed to slide against each other in a motion that is restrained by a dovetail sliding joint. Two sliding interfaces that allow this sliding motion at an attractively low friction coefficient are experimentally investigated: A PVC sand-wich (PVC-s) sliding interface, comprising a thin layer of sand that is sand-wiched between two PVC layers and a timber sand-wich sliding interface consisting of a thin layer of sand encapsulated between two beech timber surfaces. A set of low-cost steel springs is designed and installed on both sides of the dovetail joint to recenter the structure back to its original position after the end of an earthquake ground motion excitation. A novel, low-cost and deformable wood material fabricated from delignified balsa wood is used to reduce the pounding effects before the activation of the steel springs. The seismic behavior and the recentering ability of the novel timber-based energy dissipation system subjected to an ensemble of recorded earthquake ground motion excitations was experimentally investigated through a large-scale shaking table investigation at ETH Zurich.

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Section: Influence Of Added Mass On the Responsesupporting

confidence: 69%

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Tsiavos

Kolyfetis

Panzarasa

et al. 2022

Bull Earthquake Eng

Self Cite

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“…12. As presented in the figure, the dynamic instabilities manifested by increased values of drift for small intensity increments are observed for more ground motions when the seismic code compliance decreases, as observed by Tsiavos et al (2017Tsiavos et al ( , 2020. These instabilities indicate more extensive structural collapse (Vamvatsikos and Cornell 2002;D'Ayala et al 2015) for decreased seismic code compliance and can be more clearly illustrated in the fragility curves shown in Fig.…”

Section: Ida Curves Of the Four Building Models Of Varying Compliancementioning

confidence: 82%

Compliance-based estimation of seismic collapse risk of an existing reinforced concrete frame building

Tsiavos

Amrein

Bender

et al. 2021

Bull Earthquake Eng

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Seismic evaluation of existing structures is based on determining the damage likely to occur during the lifetime of these structures due to earthquake ground motion excitation. However, there is not a consensus about the acceptable level of seismic damage, the expected lifetime of these structures, and the seismic hazard level(s) to evaluate the structures at. This paper presents a methodology for a parametric calculation of the seismic collapse risk of an existing Reinforced Concrete (RC) frame building based on its seismic code compliance, quantified by a dimensionless metric. This metric, defined as compliance factor, compares the seismic capacity of an existing structure with the seismic demand for a new structure at a predetermined hazard level. The inelastic seismic behavior of four models of the RC frame building of varying compliance was analytically investigated in this study to demonstrate the novel methodology. The four models of the RC building were chosen to represent existing RC frame structures designed and constructed before the introduction of modern seismic code provisions. These four building models were excited by a group of earthquake ground motion excitations using Incremental Dynamic Analysis. The collapse probabilities of the four building models, representing varying values of seismic code compliance, were determined for two different locations corresponding to regions of moderate and high seismic hazard, thus laying the basis for the compliance-based estimation of the seismic collapse risk of existing structures.

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“…Seismic base isolation, also known as base isolation [27][28][29][30], is a popular technique for protecting structures against earthquakes. It can substantially decouple the superstructure from its substructure, thus protecting the building from life loss or damage to non-structural components.…”

Section: Retrofit Solution S3: Seismic Base Isolationmentioning

confidence: 99%

Requalification of RC Frame Apartment Buildings: Comparison of Seismic Retrofit Solutions Based on a Multi-Criteria Approach

et al. 2021

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Increasing environmental concerns are leading to measures and incentives aimed at reducing the energy consumption of buildings, which must be accompanied by substantial mitigation of seismic and structural risk. As for technical issues, it is important to select effective solutions specifically for medium-size RC apartment buildings (e.g., 3–6 storeys), which is where a large share of the Italian population lives today. To this end, it is important to compare, among other factors, the direct and indirect costs related to alternative techniques, thus allowing stakeholders (mainly private) and designers to select the most suitable solution for each case at hand and, finally, to speed up the design process. In this paper, different seismic strengthening techniques are designed and applied to a case study RC frame building that is representative of the EU building stock. An in-depth comparison is made with the aim of showing the advantages and disadvantages of different choices, mainly based on required costs and possible disruptions, keeping the targeted structural performance equal. Specifically, the possibility of disruption is a key point in hastening or, more frequently, hindering the implementation of the decision. In fact, people’s hesitation to leave their home, as well as the difficulty and high costs involved in finding temporary apartments if many people are involved, generally prevent such interventions from taking place. For this reason, some state-of-the-art techniques—that have minimum impact on non-structural elements, that can be applied only on the outside, and that can still provide an effective seismic retrofit—are examined and critically compared in the paper through a multi-criteria decision-making method.

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Experimental and analytical investigation of the inelastic behavior of structures isolated using friction pendulum bearings

Cited by 11 publications

References 12 publications

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Shaking table investigation of a low-cost and sustainable timber-based energy dissipation system with recentering ability

Compliance-based estimation of seismic collapse risk of an existing reinforced concrete frame building

Requalification of RC Frame Apartment Buildings: Comparison of Seismic Retrofit Solutions Based on a Multi-Criteria Approach

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