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Sample translations submitted: 1
English to Spanish: CYCLIC STRESS-STRAIN BEHAVIOR OF REINFORCING STEEL INCLUDING EFFECT OF BUCKLING General field: Tech/Engineering
Source text - English CYCLIC STRESS-STRAIN BEHAVIOR OF REINFORCING STEEL
INCLUDING EFFECT OF BUCKLING
By Mario E. Rodriguez,1 Member, ASCE, Juan C. Botero,2 and Jaime Villa3
ABSTRACT: It is expected that during strong earthquakes, longitudinal reinforcing steel in reinforced concrete
structural elements may undergo large tension and compression strain reversals. Because of insufficient tie
spacing, this repeated loading into the inelastic range may lead to buckling of steel reinforcing bars. Even though
this problem has been studied by several researchers, most of these studies have been based on monotonic
behavior. In this research, steel coupons were machined from steel reinforcing bars conforming to most of the
ASTM A 706 specifications. These specimens were tested under axial-strain-controlled monotonic and reversed
cyclic axial loading. The tests were performed until the specimens failed, in all cases under compressive loading.
To study the effects of the ratio of spacing of lateral supports (Sh) to bar diameter (D) on reinforcement stability,
tests were performed for Sh /D ratios of 2.5, 4, 6, and 8. Based on observed buckling behavior in reinforcing
bars under cyclic (reversed) loading, a procedure is proposed for predicting onset of buckling. The use of this
procedure, along with an analytical model proposed in the literature for the cyclic behavior of reinforcing steel,
gave results that were in good agreement with experimental results obtained in this study.
Translation - Spanish COMPORTAMIENTO CÍCLICO DE ESFUERZO-DEFORMACIÓN DEL ACERO DE REFUERZO INCLUYENDO EL EFECTO DE PANDEO
Por Mario E. Rodríguez, Miembro; ASCE, Juan C. Botero, y Jaime Villa
RESUMEN: Se espera que durante fuertes terremotos, el acero de refuerzo longitudinal en elementos estructurales de hormigón armado puedan recibir una gran tensión y reversiones de deformación por compresión. Debido al espaciamiento de placas insuficiente, esta carga repetitiva en el rango inelástico puede conducir al pandeo de las barras de acero de refuerzo. A pesar de que este problema ha sido estudiado por muchos investigadores, la mayoría de estos estudios se basan en el comportamiento monotónico. En esta investigación, los tubos de acero se tornearon a partir de las barras de acero de refuerzo conforme a la mayoría de las especificaciones ASTM A 76. Estas muestras fueron probadas bajo la carga cíclica axial revertida y monotónica con deformación axial controlada. Las pruebas fueron realizadas hasta que el prototipo falló, en todos los casos fue sometido a carga compresiva. Para estudiar los efectos de la proporción de espaciamiento de los soportes laterales (Sh) al diámetro de la barra (D) en estabilidad de armadura las pruebas fueron realizadas con las proporciones Sh/D de 2,5; 4; 6 y 8. Basados en el comportamiento de pandeo observado en las barras de refuerzo bajo carga cíclica (revertida), se propone un procedimiento para predecir el inicio del pandeo. El uso de este procedimiento, junto con el modelo analítico propuesto en la literatura para el comportamiento cíclico del acero de refuerzo, entregaron resultados que coincidieron con los resultados experimentales obtenidos en este estudio.
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Years of experience: 11. Registered at ProZ.com: Nov 2014.