Parámetros de durabilidad de puentes sobre la base de su comportamiento dinámico DOI Creative Commons

Juan Antonio López Aragón

Published: April 30, 2024

This Doctoral Thesis is dedicated to the study of behaviour dynamic parameters bridges as a way monitor their structural health. It responds motivation helping clarify some technical problems currently existing in monitoring structures, such relatively few studies carried out on real identification stable parameters, an approach influence typology, knowing what degree environmental variables and possible modeling must be considered, or delving into calculation methods obtaining modal damping ratio its possibilities for improvement. With this purpose, objectives were set conclude state art matter relation theoretical basis, analysis damages common pathologies practical results obtained by other researchers; depth methodology determining try propose improvements methods; analyse posteriori several structures equipped with instrumentation, see possibility detecting incidents based changes behaviour, studying effect degradation parameters. In order carry these studies, different computer tools have been developed that allow enabling accelerograms frequency domain factor application methods. ratio, comparative most included proposal alternative method made, reduction signal spectrum. sense, validation applying it both simulations, which sensitivity performed, experimental from first indicated below. The has three structures: road, Arcos de Alconétar viaduct; two railways, Arroyo del Valle las Piedras viaducts. reviewed, well available computational models, general out, comparing expected according model, previous bibliographic references whenever possible. Given did not suffer any damage during period, was focused causes variations over time values natural frequencies reaching specific conclusions case structure. structure, correlations ambient temperature maximum accelerations recorded, vertically horizontally, could frequencies. For certain eigenfrequencies, wind recorded obtained. Through Thesis, confirmed, happens areas engineering, potential incorporating health systems particular considerations taken account. RESUMEN La presente Tesis está dedicada al estudio comportamiento los parámetros dinámicos puentes como forma monitorizar su salud estructural. misma responde la motivación ayudar aclarar algunos problemas técnicos existentes actualmente en monitorización dinámica estructuras, tales relativamente escasos estudios realizados sobre estructuras reales, identificación estables, una aproximación influencia tipología estructural, saber qué grado hay que considerar ambientales y posible modelización, o profundizar métodos cálculo obtención amortiguamiento sus posibilidades mejora. Con esta finalidad, se plantearon objetivos concluir el estado arte materia relación con fundamentos teóricos, análisis daños patologías habituales resultados prácticos obtenidos por otros investigadores; estudiar profundidad metodología para determinación e intentar proponer mejoras cálculo; analizar varias reales dotadas instrumentación dinámica, ver posibilidad detección incidencias basándose cambios mismas, estudiando efecto degradación dinámicos. Para poder realizar estos estudios, han desarrollado distintas herramientas informáticas permiten dinámico posibilitando acelerogramas dominio frecuencia mediante aplicación distintos cálculo. En modal, incluye un comparativo más realiza propuesta teórica método alternativo, basado reducción espectro señal. este sentido, validación aplicándolo tanto simulaciones teóricas, sensibilidad, experimentales procedentes primera indican continuación. El ha realizado tres reales: viaria, viaducto Alconétar; dos ferroviarias, viaductos Piedras. Se revisado así modelos teóricos disponibles, efectuado comparando esperables acuerdo modelo cálculo, previos referencias bibliográficas siempre sido posible. Dado no sufrieron ningún daño durante periodo monitorización, centró posibles causas variaciones tiempo valores frecuencias propias amortiguamiento, llegando conclusiones concretas caso estructura. dicha estructura, pudieron obtener correlaciones temperatura ambiente aceleraciones máximas registradas, vertical horizontal. determinadas frecuencias, obtuvieron viento registradas. Mediante Tesis, quedado constatada, igual sucede otras áreas ingeniería, potencialidad incorporación sistemas estructural consideraciones particulares deben ser tenidas cuenta.

Yoke-Type Elasto-Magnetic Sensor-Based Tension Force Monitoring Method for Enhancement of Field Applicability DOI Creative Commons
Ho-Jun Lee, Sae-Byeok Kyung, Ju‐Won Kim

et al.

Sensors, Journal Year: 2024, Volume and Issue: 24(11), P. 3369 - 3369

Published: May 24, 2024

Tension members are key that maintain stability and improve the strength of structures such as cable-stayed bridges, PSC structures, slopes. Their application has recently been expanded to new fields mooring lines in subsea aerospace fields. However, tensile tension can be abnormal owing various risk factors may lead collapse entire structure. Therefore, continuous monitoring is necessary ensure structural safety. In this study, an improved elasto-magnetic (E/M) sensor was used monitor force using a nondestructive method. General E/M sensors have limitations make it difficult apply them operating their solenoid structure, which requires field winding. To overcome problem, magnetization part yoke-type sensor, study. For development sensors, numerical design performance verification were performed through eddy current solution-type simulations ANSYS Maxwell. Using manufactured induced voltage signals according specimen increasing from 0 10 tons at 1-ton intervals repeatedly measured DAQ with wireless communication. The indexed peak-to-peak value voltages analyze signal change patterns increased. Finally, analyzed results compared those solenoid-type confirm same pattern. confirmed member estimated proposed sensor. This expected become effective technology optimization usability studies for each target future.

Language: Английский

Citations

1
Some Considerations about the Incorporation of Dynamic Parameters in the Structural Health Monitoring Systems of Bridges DOI Creative Commons
Juan-Antonio López-Aragón, Miguel Ángel Astiz Suárez

Applied Sciences, Journal Year: 2023, Volume and Issue: 14(1), P. 33 - 33

Published: Dec. 20, 2023

Currently, there is a growing concern about the conservation and maintenance of infrastructure. Within this context, bridges deserve special attention, given their technical complexity strategic nature. To end, modern technology provides opportunity to implement systems for structural health monitoring (SHM), field in which great advances have been made recent years. In sense, one fastest-growing lines work Civil Engineering early detection incidents because changes dynamic behaviour structures. Throughout paper, some most notable considerations that authors appreciating latest structures studied are summarized. These may be interest possible incorporation parameters SHM could implemented other future. With purpose, review different issues must within analysis structure carried out, such as typology, type instrumentation, recorded accelerations, natural frequencies, study modal damping ratio set thresholds; also accompanied by examples observed two real monitored

Language: Английский

Citations

3
Parámetros de durabilidad de puentes sobre la base de su comportamiento dinámico DOI Creative Commons

Juan Antonio López Aragón

Published: April 30, 2024

This Doctoral Thesis is dedicated to the study of behaviour dynamic parameters bridges as a way monitor their structural health. It responds motivation helping clarify some technical problems currently existing in monitoring structures, such relatively few studies carried out on real identification stable parameters, an approach influence typology, knowing what degree environmental variables and possible modeling must be considered, or delving into calculation methods obtaining modal damping ratio its possibilities for improvement. With this purpose, objectives were set conclude state art matter relation theoretical basis, analysis damages common pathologies practical results obtained by other researchers; depth methodology determining try propose improvements methods; analyse posteriori several structures equipped with instrumentation, see possibility detecting incidents based changes behaviour, studying effect degradation parameters. In order carry these studies, different computer tools have been developed that allow enabling accelerograms frequency domain factor application methods. ratio, comparative most included proposal alternative method made, reduction signal spectrum. sense, validation applying it both simulations, which sensitivity performed, experimental from first indicated below. The has three structures: road, Arcos de Alconétar viaduct; two railways, Arroyo del Valle las Piedras viaducts. reviewed, well available computational models, general out, comparing expected according model, previous bibliographic references whenever possible. Given did not suffer any damage during period, was focused causes variations over time values natural frequencies reaching specific conclusions case structure. structure, correlations ambient temperature maximum accelerations recorded, vertically horizontally, could frequencies. For certain eigenfrequencies, wind recorded obtained. Through Thesis, confirmed, happens areas engineering, potential incorporating health systems particular considerations taken account. RESUMEN La presente Tesis está dedicada al estudio comportamiento los parámetros dinámicos puentes como forma monitorizar su salud estructural. misma responde la motivación ayudar aclarar algunos problemas técnicos existentes actualmente en monitorización dinámica estructuras, tales relativamente escasos estudios realizados sobre estructuras reales, identificación estables, una aproximación influencia tipología estructural, saber qué grado hay que considerar ambientales y posible modelización, o profundizar métodos cálculo obtención amortiguamiento sus posibilidades mejora. Con esta finalidad, se plantearon objetivos concluir el estado arte materia relación con fundamentos teóricos, análisis daños patologías habituales resultados prácticos obtenidos por otros investigadores; estudiar profundidad metodología para determinación e intentar proponer mejoras cálculo; analizar varias reales dotadas instrumentación dinámica, ver posibilidad detección incidencias basándose cambios mismas, estudiando efecto degradación dinámicos. Para poder realizar estos estudios, han desarrollado distintas herramientas informáticas permiten dinámico posibilitando acelerogramas dominio frecuencia mediante aplicación distintos cálculo. En modal, incluye un comparativo más realiza propuesta teórica método alternativo, basado reducción espectro señal. este sentido, validación aplicándolo tanto simulaciones teóricas, sensibilidad, experimentales procedentes primera indican continuación. El ha realizado tres reales: viaria, viaducto Alconétar; dos ferroviarias, viaductos Piedras. Se revisado así modelos teóricos disponibles, efectuado comparando esperables acuerdo modelo cálculo, previos referencias bibliográficas siempre sido posible. Dado no sufrieron ningún daño durante periodo monitorización, centró posibles causas variaciones tiempo valores frecuencias propias amortiguamiento, llegando conclusiones concretas caso estructura. dicha estructura, pudieron obtener correlaciones temperatura ambiente aceleraciones máximas registradas, vertical horizontal. determinadas frecuencias, obtuvieron viento registradas. Mediante Tesis, quedado constatada, igual sucede otras áreas ingeniería, potencialidad incorporación sistemas estructural consideraciones particulares deben ser tenidas cuenta.

Citations

0