Results 31 to 40 of about 5,599 (290)

Old - New Concrete Interfacial Bond Slip Monitoring in Anchored Rebar Reinforced Concrete Structure Using PZT Enabled Active Sensing

open access: yesFrontiers in Materials, 2021
Post-installed anchor technology is widely used for structural strengthening and for retrofitting existing constructions. The old–new concrete interface associated with using this technology is of great significance in the shear capacity of concrete ...
Jian Jiang   +4 more
doaj   +1 more source

Seismic-wave path attenuation and local site responses in eastern Guangdong province revealed by the ground-motion spectral analyses

open access: yesFrontiers in Earth Science, 2023
In an effort to investigate the attenuation characteristics and site effects in eastern Guangdong, 659 strong-motion recordings received by 27 stations were selected for spectral analysis to separate path attenuation, site effects and source spectra. The
Huadeng Wu   +15 more
doaj   +1 more source

Axial Load Monitoring for Concrete Columns Using a Wearable Smart Hoop Based on the Piezoelectric Impedance Frequency Shift: A Feasibility Study

open access: yesAdvances in Civil Engineering, 2020
Concrete columns are critical in supporting the weight of an entire structural frame and also play a key role in force transferring among structural members.
Yabin Liang, Zhicheng Ye, Qian Feng
doaj   +1 more source

Preliminary discussion on the earthquake early warning network of Jiangxi Province

open access: yes地震科学进展, 2021
The earthquake early warning system is formed by seismic stations and the urgent information systems. Many seismic stations are added to the original seismic monitoring network and old operation systems are upgraded.
Si Yu, Tingting Tang
doaj   +1 more source

Crowd-Funded Earthquake Early-Warning System

open access: yes2022 International Conference on Computational Science and Computational Intelligence (CSCI), 2022
Earthquake early warning systems has been proven to save countless lives in Japan, Mexico, and Chile, where earthquake warnings are often broadcast live on TV up to a minute before residents experience shaking. Unfortunately, traditional early warning systems require extensive capital investment.
Hudson Kaleb Dy, James Hsi-Jen Yeh
openaire   +2 more sources

A combined method for high-speed rail seismic monitoring and early warning

open access: yesGeodesy and Geodynamics, 2017
The ground motion characteristics include the strength, frequency spectrum and duration time. In China, the PGA (peak ground acceleration) is commonly used in determination of whether an earthquake warning is necessary when the high-speed train is on the
Zhigao Chen, Jun Huang
doaj   +1 more source

Correlation of the slope of the initial part of P-wave envelope, hypocenter depth and plate boundary

open access: yesGeodesy and Geodynamics, 2018
We investigated correlation of the slope of the initial part of P-wave envelope, hypocenter depth and plate boundaries by B-Δ method, which is used to determine epicentral distances in the Japan Meteorological Agency and Japan Railway Company earthquake ...
Chao Lian   +3 more
doaj   +1 more source

Electro-Mechanical Impedance (EMI) Based Interlayer Slide Detection Using Piezoceramic Smart Aggregates—A Feasibility Study

open access: yesSensors, 2018
Interlayer slide damage is one of the main causes of landslide hazard, inflicting huge economic losses and casualties. It is urgent to accurately detect the initiation and development of the interlayer slide damage in real time. In this paper, a study on
Jianchao Wu, Weijie Li, Qian Feng
doaj   +1 more source

Loosening Monitoring of the Threaded Pipe Connection Using Time Reversal Technique and Piezoceramic Transducers

open access: yesSensors, 2018
Threaded pipe connections are commonly used in the oil and gas industry in particular to connect casting strings, drill pipe strings, production and transportation risers, and pipelines.
Yabin Liang, Qian Feng, Dongsheng Li
doaj   +1 more source

Damping modification factors for acceleration response spectra

open access: yesGeodesy and Geodynamics, 2017
DMF (Damping modification factors) are used to modify elastic response spectral values corresponding to damping ratio 5% to other damping levels. The influence of seismological parameters (magnitude, epicentral distances and site conditions) on DMF for ...
Heng Li, Feng Chen
doaj   +1 more source

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