Configuration of a Gravel-Rubber Geotechnical Seismic Isolation System from Laboratory and Field Tests DOI
Dimitris Pitilakis, Anastasios Anastasiadis, Athanasios Vratsikidis

et al.

Published: Jan. 1, 2023

We present the outcomes derived from controlled laboratory experiments on utilizing gravel rubber mixtures (GRM) as a geotechnical seismic isolation (GSI) stratum beneath foundational structure of EuroProteas prototype. The study encompassed three distinct GRM compositions characterized by varying proportions relative to total mixture weight (0%, 10%, and 30%) employed foundation soil. These GSI-structure systems were subjected external harmonic forces applied atop across broad spectrum frequencies force magnitudes. Preceding commencement field experiments, resonant column cyclic triaxial compression assessments conducted specimens featuring identical fractions mean grain size ratios. Our tests revealed that an increase in content resulted reduction shear modulus (Gπ‘œ) augmentation damping ratio (Dπ‘œ) while concurrently inducing more linear character G/Gπ‘œ-log𝛾-D profiles. findings examinations align closely with those ascertained investigations. Specifically, it was confirmed GSI layer thickness 0.50 meters, composed incorporating 30% content, exhibited discernible overall stiffness system, accompanied corresponding alteration its fundamental vibrational frequency. enhanced within system manifested through observable reductions acceleration recordings diminished strain development at base encompassing wide range frequencies.

Language: Английский

Early Detection of Earthquakes Using IoT and Cloud Infrastructure: A Survey DOI Open Access
Mohamed S. Abdalzaher, Moez Krichen,

Derya Yiltas-Kaplan

et al.

Sustainability, Journal Year: 2023, Volume and Issue: 15(15), P. 11713 - 11713

Published: July 28, 2023

Earthquake early warning systems (EEWS) are crucial for saving lives in earthquake-prone areas. In this study, we explore the potential of IoT and cloud infrastructure realizing a sustainable EEWS that is capable providing to people coordinating disaster response efforts. To achieve goal, provide an overview fundamental concepts seismic waves associated signal processing. We then present detailed discussion IoT-enabled EEWS, including use networks track actions taken by various organizations gather data, analyze it, send alarms when necessary. Furthermore, taxonomy emerging approaches using facilities, which includes integration advanced technologies such as machine learning (ML) algorithms, distributed computing, edge computing. also elaborate on generic architecture efficient highlight importance considering sustainability design systems. Additionally, discuss role drones management their enhance effectiveness EEWS. summary primary verification validation methods required under consideration. addition contributions mentioned above, study highlights implications earthquake detection management. Our research involved comprehensive survey existing literature infrastructure. conducted thorough analysis facilities findings suggest can significantly improve speed efforts, thereby reducing economic impact earthquakes. Finally, identify gaps domain future directions toward achieving Overall, provides valuable insights into emphasizes designing

Language: Английский

Citations

37
Seismic isolation effect of rubber-sand mixture cushion under different site classes based on a simplified analysis model DOI
Mengtao Wu,

Wenhui Tian,

Jie He

et al.

Soil Dynamics and Earthquake Engineering, Journal Year: 2023, Volume and Issue: 166, P. 107738 - 107738

Published: Jan. 9, 2023

Language: Английский

Citations

34
Experimental investigation of sliding-based isolation system with re-centering functions for seismic protection of masonry structures DOI
Amir Ali, Chunwei Zhang,

Tayyaba Bibi

et al.

Structures, Journal Year: 2024, Volume and Issue: 60, P. 105871 - 105871

Published: Jan. 23, 2024

Language: Английский

Citations

15
Serviceability performance of buildings founded on rubber–soil mixtures for geotechnical seismic isolation DOI Creative Commons
Hing‐Ho Tsang,

Duc‐Phu Tran,

Emad Gad

et al.

Australian Journal of Structural Engineering, Journal Year: 2023, Volume and Issue: 24(4), P. 265 - 278

Published: June 29, 2023

Base isolation is a low-damage seismic design strategy that can be used for constructing resilient structures. Geotechnical (GSI) new category of emerging base techniques has attracted global interest in the past decade. Research on GSI based rubber-soil mixtures (RSM) focused structural performance under earthquake actions, whilst there are concerns over serviceability limit states (SLS) requirements relation to (i) human comfort strong winds and (ii) ground settlement gravity, which may induce cracking durability issues This article presents first study buildings constructed with GSI-RSM system. The finite element model coupled soil-foundation-structure system been validated by data recorded from geotechnical centrifuge testing. numerical estimates have also compared analytical predictions. It concluded satisfactorily fulfill SLS requirements.

Language: Английский

Citations

13
Energy Dissipation Efficiency of Geotechnical Seismic Isolation with Gravel-Rubber Mixtures: Insights from FE Non-Linear Numerical Analysis DOI Creative Commons
Davide Forcellini, Gabriele Chiaro, Alessandro Palermo

et al.

Journal of Earthquake Engineering, Journal Year: 2024, Volume and Issue: 28(9), P. 2422 - 2439

Published: Feb. 12, 2024

This paper provides new and useful insights into the performance efficiency of geotechnical seismic isolation (GSI) systems with gravel-rubber mixtures containing 10%, 25% 40% volumetric rubber content (VRC). Finite element numerical models were developed in OpenSees subjected to sinusoidal ground motions varying input base acceleration frequency. The best was attained for VRC = at a frequency 8 Hz. Using newly GSI index, energy dissipation found vary between good excellent, while that 10% is poor.

Language: Английский

Citations

5
Configuration of a gravel-rubber geotechnical seismic isolation system from laboratory and field tests DOI
Dimitris Pitilakis, Anastasios Anastasiadis, Athanasios Vratsikidis

et al.

Soil Dynamics and Earthquake Engineering, Journal Year: 2024, Volume and Issue: 178, P. 108463 - 108463

Published: Jan. 14, 2024

Language: Английский

Citations

4
Experimental investigation of the mechanical behaviour of sand-rubber-gravel mixtures DOI
G. C. I. Lin, Wei Liu, Fang Yang

et al.

Bulletin of Engineering Geology and the Environment, Journal Year: 2025, Volume and Issue: 84(2)

Published: Jan. 22, 2025

Language: Английский

Citations

0
Preface for the special issue on geotechnical seismic isolation (GSI) DOI Creative Commons
Hing‐Ho Tsang, Kyriazis Pitilakis

Bulletin of Earthquake Engineering, Journal Year: 2023, Volume and Issue: 21(8), P. 3745 - 3748

Published: May 4, 2023

Language: Английский

Citations

10
FEM investigation of full-scale tests on DSSI, including gravel-rubber mixtures as geotechnical seismic isolation DOI Creative Commons
Glenda Abate, Angela Fiamingo, Maria Rossella Massimino

et al.

Soil Dynamics and Earthquake Engineering, Journal Year: 2023, Volume and Issue: 172, P. 108033 - 108033

Published: May 16, 2023

Soil-rubber mixtures underneath foundations are an eco-sustainable and low-cost Geotechnical Seismic Isolation (GSI) solution. Using rubber grains from end-of-life tyres in the can provide a modern recycling system that reduces stockpile of scrap worldwide. In recent years, gravel-rubber (GRMs) properties have been investigated, finding good behaviour static dynamic conditions. Laboratory tests on GRMs advantages as GSI form layer underlying foundation structure available literature. Nevertheless, only one experimental campaign full-scale prototype resting with 0% 30% content per weight was performed (SOFIA-SERA Research Programme). This paper presents 3D advanced nonlinear FEM analyses to reproduce furnish new results about above-mentioned test. The calibration parameters different constitutive models used for modelling soil supported by extensive geotechnical characterization. developed model validated test terms accelerations velocities. Then, studied, also considering shear strains versus stresses horizontal vertical displacements, quantities not investigated experimentally. Finally, axial displacements. highlights fundamental role both numerical modelling, invaluable tools coupled seismic soil-structure systems, including innovative materials, such GRMs, main using GSI.

Language: Английский

Citations

10
Geotechnical seismic isolation based on high-damping polyurethane: centrifuge modelling DOI Creative Commons
Hing‐Ho Tsang,

Duc‐Phu Tran,

Wen-Yi Hung

et al.

Bulletin of Earthquake Engineering, Journal Year: 2024, Volume and Issue: 22(4), P. 2001 - 2023

Published: Jan. 9, 2024

Abstract Geotechnical seismic isolation (GSI) is a new category of low-damage resilient design methods that are in direct contact with geomaterials and which the mechanism primarily involves geotechnics. Various materials have been explored for placing around foundation system layer form to facilitate beneficial effects dynamic soil-foundation-structure interaction, as one GSI mechanisms. To reduce thickness ensure uniformity its material properties, use thin homogeneous high-damping polyurethane (HDPU) was investigated this study via centrifuge modelling. HDPU sheets were installed three different configurations at interface between structural surrounding soils realising GSI. It found using can provide excellent all configurations. The average rates demand reduction amongst eight earthquake events ranged from 35 80%. A clear correlation period-lengthening ratio percentage be observed One periphery only particularly suitable retrofitting existing structures does not require making changes systems or architectural features.

Language: Английский

Citations

3