Use of rubberised backfills for improving the seismic response of integral abutment bridges

Argyroudis, Sotirios; Palaiochorinou, Anastasia; Mitoulis, Stergios A.; Pitilakis, Dimitris

doi:10.1007/s10518-016-0018-1

Cited by 38 publications

(7 citation statements)

References 27 publications

(4 reference statements)

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“…Besides, recycled rubber in pure form or mixed with soil is proposed in the construction industry in many applications. Granulated tire rubber has been studied numerically [25,26] or experimentally [27] as a lightweight backfill material to reduce the lateral earth pressures on retaining walls. Moreover, the use of tire shreds was proposed in the design of embankments overlying soft soils to minimize the vertical stresses and settlements [24,28] and have been investigated experimentally in constructing a drainage layer based on their high hydraulic conductibility [29,30].…”

Section: Introductionmentioning

confidence: 99%

Large‐scale field testing of geotechnical seismic isolation of structures using gravel‐rubber mixtures

Pitilakis

Anastasiadis

Vratsikidis

et al. 2021

Earthq Engng Struct Dyn

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We present the results of a large-scale experimental campaign performed on the prototype structure of EuroProteas in Thessaloniki, Greece, to assess the effectiveness of gravel-rubber mixture (GRM) layers underneath shallow foundations as a means of geotechnical seismic isolation (GSI). We found that the geotechnical seismic isolation of structures is optimized by increasing the rubber content of the soil rubber mixture up to 30% per mixture weight. Although the effectiveness of the GSI systems has been investigated numerically and in small-scale experiments, this paper seeks to fill the gap in the lack of full-scale experimental studies on this subject. Three soil pits were excavated and backfilled with GRM of different rubber content per weight to serve as foundation soil for the structure. A large number of instruments were installed on the structure, the foundation, the soil surface, and inside the gravel-rubber mixture layers beneath the foundation to fully monitor the GSI-structure systems' response in three dimensions. The experimental investigation included ambient noise, free-and forced-vibration tests. Our results showed that a geotechnical seismic isolation layer composed of a gravel-rubber mixture with 30% rubber content per weight effectively isolates the structure. Even 0.5m thickness (i.e., B/6 of the foundation width) of the GSI system is successfully cutting off practically all emitted waves at a (horizontal or vertical) distance of B/6 from the foundation. A significant reduction in the GSI-structure system's stiffness was apparent, leading to a rocking-dominant response. The rise in the system's damping and the substantial energy dissipation inside the GRM layer highlight its effectiveness as a geotechnical seismic isolation system.

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Section: Introductionmentioning

confidence: 99%

Large‐scale field testing of geotechnical seismic isolation of structures using gravel‐rubber mixtures

Pitilakis

Anastasiadis

Vratsikidis

et al. 2021

Earthq Engng Struct Dyn

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“…Hence, the beneficial effects of soil‐foundation‐structure interaction can be exploited. Similar concepts have also been applied to underground infrastructure 13 , 14 as well as retaining and bridge abutment structures 15–19 …”

Section: Introductionmentioning

confidence: 99%

Performance of geotechnical seismic isolation system using rubber‐soil mixtures in centrifuge testing

Tsang

Tran

Hung

et al. 2020

Earthq Engng Struct Dyn

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Geotechnical seismic isolation (GSI) system involves the dynamic interaction between structure and low‐modulus foundation material, such as rubber‐soil mixtures (RSM). Whilst numerical studies have been carried out to demonstrate the potential benefits of GSI‐RSM system, experimental research is indispensable for confirming its isolation mechanism and effectiveness in reducing structural demand. In this regard, centrifuge modelling with an earthquake shaker under an acceleration field of 50 g adopted in this study can mimic the actual nonlinear dynamic response characteristics of RSM and subsoil in a coupled soil‐foundation‐structure system. This is the first time the performance of GSI‐RSM system was examined in a geotechnical centrifuge. It was found that an average of 40‐50% reduction of structural demand can be achieved. The increase in both the horizontal and rotation responses of the foundation was also evidenced. The unique augmented rocking mechanism with reversible foundation rotation was highlighted.

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“…For approach fills to bridge abutments: structural approach slabs; alternative materials, such as rubber-sand mixtures (Mitoulis et al 2016;Argyroudis et al 2016).…”

Section: Natural Hazards and Their Effects On Transport Infrastructurementioning

confidence: 99%

Fragility of transport assets exposed to multiple hazards: State-of-the-art review toward infrastructural resilience

Argyroudis

Mitoulis

Winter

et al. 2019

Reliability Engineering & System Safety

177

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Vulnerability is a fundamental component of risk and its understanding is important for characterising the reliability of infrastructure assets and systems and for mitigating risks. The vulnerability analysis of infrastructure exposed to natural hazards has become a key area of research due to the critical role that infrastructure plays for society and this topic has been the subject of significant advances from new data and insights following recent disasters. Transport systems, in particular, are highly vulnerable to natural hazards, and the physical damage of transport assets may cause significant disruption and socioeconomic impact. More importantly, infrastructure assets comprise Systems of Assets (SoA), i.e. a combination of interdependent assets exposed not to one, but to multiple hazards, depending on the environment within which these reside. Thus, it is of paramount importance for their reliability and safety to enable fragility analysis of SoA subjected to a sequence of hazards. In this context, and after understanding the absence of a relevant study, the aim of this paper is to review the recent advances on fragility assessment of critical transport infrastructure subject to diverse geotechnical and climatic hazards. The effects of these hazards on the main transport assets are summarised and common damage modes are described. Frequently in practice, individual fragility functions for each transport asset are employed as part of a quantitative risk analysis (QRA) of the infrastructure. A comprehensive review of the available fragility functions is provided for different hazards. Engineering advances in the development of numerical fragility functions for individual assets are discussed including soilstructure interaction, deterioration, and multiple hazard effects. The concept of SoA in diverse ecosystems is introduced, where infrastructure is classified based on (i) the road capacity and speed limits and (ii) the geomorphological and topographical conditions. A methodological framework for the development of numerical fragility functions of SoA under multiple hazards is proposed and demonstrated. The paper concludes by detailing the opportunities for future developments in the fragility analysis of transport SoA under multiple hazards, which is of paramount importance in decision-making processes around adaptation, mitigation, and recovery planning in respect of geotechnical and climatic hazards.

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Use of rubberised backfills for improving the seismic response of integral abutment bridges

Cited by 38 publications

References 27 publications

Large‐scale field testing of geotechnical seismic isolation of structures using gravel‐rubber mixtures

Large‐scale field testing of geotechnical seismic isolation of structures using gravel‐rubber mixtures

Performance of geotechnical seismic isolation system using rubber‐soil mixtures in centrifuge testing

Fragility of transport assets exposed to multiple hazards: State-of-the-art review toward infrastructural resilience

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