Geotechnical Seismic Isolation technology with Rubber-Soil Trenches for earthquake resilience of existing structures
ERIES-GSIRST
Dataset Description
This dataset contains acceleration and velocity recordings of the EuroProteas structure (foundation and roof) and the soil in the vicinity of the structure, under forced vibration tests, and diffraction of wave propagation from the source to the structure using a trench filled with gravel-rubber mixtures.
The aim of ERIES-GSIRST experimental program was to demonstrate the feasibility of using trench fills with Rubber–Soil mixtures (RSm) to reduce incoming ground vibrations. Trench fills are a well-known and widely used vibration-isolation system that aims to attenuate energy by scattering, intercepting, and diffracting surface waves, as reported in the literature. For this purpose, a trench approximately 5.5 m long and 0.40 m wide was constructed at a distance of about 2 m from the foundation slab of the structure. The trench depth reached 1.80 m. Different RSm configurations were tested as trench fills in order to evaluate the effectiveness of these mixtures for vibration isolation. The configurations that were tested were 100% rubber (per volume), 75% rubber per volume, and 50% rubber per volume (and the rest gravel).
During the experimental campaign of ERIES-GSIRST, a series of forced vibration tests were performed using two different types of shakers. The first one was the MK-500U eccentric mass vibrator system (ANCO Engineers Inc.), as a source of harmonic excitation. This mass shaker can generate a maximum force amplitude of 50 kN and operates within a frequency range of 0.1 Hz to 20 Hz. The second device was the APS-420 SPEKTRA electric shaker, which operates over a much wider frequency range—0.1 Hz to 200 Hz—but with a maximum force output of 900 N. Both shakers were positioned approximately 6 m from the foundation slab of the structure and about 3.5 m from the edge of the trench.
The instrumentation comprised high-resolution accelerometers and seismometers. All field tests were conducted at the Euroseistest/EuroProteas facility. Drawings, instrumentation layouts, and photos are also included in the dataset.
Specimens Description File
Specimens
1. Trench in front of the structure
1
A trench approximately 5.5 m long and 0.40 m wide was constructed at a distance of about 2 m from the foundation slab of the EuroProteas structure. The trench depth reached 1.80m. Different soil rubber mixtures configurations were tested as trench fills in
order to evaluate the effectiveness of these mixtures for vibration isolation.
During the experimental campaign of ERIES-GSIRST, a series of forced vibration tests were performed using two different types of shakers. The first one was the MK-500U eccentric mass vibrator system (ANCO Engineers Inc.), as a source of harmonic excitation. This mass shaker can generate a maximum force amplitude of 50 kN and operates within a frequency range of 0.1 Hz to 20 Hz. The vibrator's eccentricity can be adjusted by using different pairs of mass plates. The second device was the APS-420 SPEKTRA electric shaker, which operates over a much wider frequency range—0.1 Hz to 200 Hz—but with a maximum force output of 900 N. Both shakers were positioned approximately 6 m
from the foundation slab of the structure and about 3.5 m from the edge of the trench.
1. Geotechnical seismic isolation investigation
The configurations that were tested were 1) natural soil, 2) empty trench, 3) 100% rubber (per volume) fill, 4) 75% rubber per volume and 5) 50% rubber per volume (and the rest gravel).
Instrumentation
The instrumentation comprised high-resolution accelerometers and seismometers. The instruments were placed on the soil, on the foundation, and on the structure's roof slab.
Project Metadata
Rights
Creative Commons Attribution 4.0 International.
CC BY 4.0
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