Seismic resilience of bridges isolated with traditional and geotechnical seismic isolation (GSI)

Bulletin of Earthquake Engineering, Journal Year: 2023, Volume and Issue: 21(7), P. 3521 - 3535

Published: March 7, 2023

Language: Английский

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Seismic isolation effect of rubber-sand mixture cushion under different site classes based on a simplified analysis model

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

Published: Jan. 9, 2023

Language: Английский

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The role of Soil Structure Interaction (SSI) on the risk of pounding between low-rise buildings

Structures, Journal Year: 2023, Volume and Issue: 56, P. 105014 - 105014

Published: Aug. 8, 2023

Language: Английский

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Development of a seismic vulnerability and risk model for typical bridges considering innovative intensity measures

Engineering Structures, Journal Year: 2023, Volume and Issue: 302, P. 117431 - 117431

Published: Dec. 29, 2023

Language: Английский

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Building wildland–urban interface zone resilience through performance-based wildfire engineering. A holistic theoretical framework

Euro-Mediterranean Journal for Environmental Integration, Journal Year: 2023, Volume and Issue: 8(3), P. 675 - 689

Published: July 10, 2023

Abstract In recent years, a worldwide expansion in the frequency of large, uncontrolled, and catastrophic wildfire events has occurred, creating drastic social, economic, environmental damage, especially wildland–urban interface (WUI) zones. This damage includes losses life, infrastructure, ecosystem services. The impacts wildfires at WUI derive from complicated multidimensional interconnected relationships present Anthropocene. To enforce resilience environment human communities against wildfires, it is critical to comprehend local social-ecological systems holistically. this paper, we theoretical framework approach, built on performance-based engineering, that envisioned be stepping stone towards resilience. attain objective, performance benchmarking design disaggregated into explicit components rigorous mathematical framework. They are linked causal inference chain, providing an integrated picture enabling decision analysis identify optimal management strategies based quantitative parameters. proposed developed total probability theorem divides risk assessment single parts, particular (1) hazard (wildfire) analysis, (2) impact characterization, (3) interaction (4) (5) (6) loss analysis. Therefore, can applied by emergency agencies directly assess society recovery after wildfire, making policy-making more effective.

Language: Английский

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Analytical design models for geotechnical seismic isolation systems

Bulletin of Earthquake Engineering, Journal Year: 2022, Volume and Issue: 21(8), P. 3881 - 3904

Published: July 25, 2022

Abstract Geotechnical Seismic Isolation (GSI) can be defined as a new category of seismic isolation techniques that involve the dynamic interaction between structural system and geo-materials. Whilst mechanism various GSI systems their performance have already been demonstrated through different research methods, there is missing link fundamental engineering practice. This paper aims to initiate development in this direction. A suite equivalent-linear foundation stiffness damping models under same framework proposed for four configurations, one which novel combination two existing ones. The exact solutions equivalent properties flexible-base also derived explicitly include inertia strain-dependent materials, are both significant systems. application analytical design has illustrated response history analyses detailed hand-calculation procedure outlined demonstrated.

Language: Английский

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Dynamic properties of recycled polyurethane-coated rubber-soil mixtures

Case Studies in Construction Materials, Journal Year: 2023, Volume and Issue: 18, P. e01859 - e01859

Published: Jan. 18, 2023

A large quantity of end-of-life tire (ELT) rubber is being blended with thermoplastic polyurethane to provide a durable and ecologically friendly material for flexible surfaces, while significant elastomeric waste (left-over cut-outs) also generated. These materials can be used efficiently seismic isolation vibration damping at minimal cost, process known as frugal innovation. In this regard, (TPE) material, which polyurethane-coated (PUcR), obtained from the recycling industry, explored in study. Herein, we targeted evaluate stiffness energy dissipation capabilities TPE or PU-coated rubber, which, best our knowledge, has never been reported before. To that end, series cyclic triaxial tests were carried out on rubber-soil mixtures. comparison untreated mixtures, shear modulus mixtures reduces by 5.5–12.7%, ratio increases up 12.6%.

Language: Английский

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Serviceability performance of buildings founded on rubber–soil mixtures for geotechnical seismic isolation

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

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Energy Dissipation Efficiency of Geotechnical Seismic Isolation with Gravel-Rubber Mixtures: Insights from FE Non-Linear Numerical Analysis

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

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Use of fragility curves to assess the seismic vulnerability of soft rock tunnels: a review

Journal of Vibroengineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Due to their distinct geotechnical and structural features, soft rock tunnels pose serious issues because of seismic sensitivity. These tunnels, often constructed in formations with lower shear strength higher deformability, are particularly susceptible damage during earthquakes. Fragility curves, which graphically represent the probability that a structure may sustain up or beyond particular threshold as function intensity, essential tools for evaluating resilience these infrastructures. This research looks closely at use fragility curves assess vulnerability tunnels. Exploring fundamental concepts methodologies involved constructing including hazard analysis, modeling, state definition, data collection statistical analysis is looked first. The review highlighted integration characteristics such deformation properties into assessment process. Key developments topic covered how machine learning Bayesian inference might improve precision usefulness curves. paper identified key findings high sensitivity intensity levels emphasized importance accurate model calibration. Important gaps risk evaluations filled by integrating cutting-edge methodologies, real-time models clarify behaviour real world. For purpose strengthening earthquake-resistant infrastructure earthquake-prone areas, engineers, scholars policymakers given practical insights.

Language: Английский

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