Post-installed shear connectors: Push-out tests of coiled spring pins vs. headed studs

Hällmark, Robert; Collin, Peter; Hicks, Stephen

doi:10.1016/j.jcsr.2019.06.009

Cited by 13 publications

(6 citation statements)

References 25 publications

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“…Para analizar las propiedades mecánicas del conector tipo ángulo, se utilizó la curva carga-deslizamiento dispuesta en el Eurocódigo 4 (UNE EN 1994 1-1, 2013); por ende, la curva contó con los datos de la parte de la carga formal (Deng et al, 2019;Hällmark et al, 2019). Como se observa en la Figura 5, uno de estos datos eran las cargas obtenidas del ensayo, las cuales se analizaron por conector (Molina y Hurtado, 2011;Bamaga et al, 2019).…”

Section: Resultados Y Discusión Curva Carga-deslizamientounclassified

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Análisis de la Resistencia a Corte de Conectores Tipo Ángulo en Losas de Hormigón Armado sobre Estructura Metálica

Franco

Martínez

Hernández³

et al. 2022

Rev. Téc. Ing. Univ. Zulia.

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Durante años se ha venido construyendo losas de hormigón sobre vigas de acero, sin embargo, el no considerar la trasmisión de esfuerzos de corte entre ellas, ocasiona que los elementos trabajen por separado. Para asegurar la transmisión de esfuerzos, la carga debe transmitirse mediante conectores mecánicos. En la construcción comúnmente se utilizan pernos stud, perfiles angulares y tornillos como conectores, aunque no todos se encuentren normados. El presente trabajo analiza el comportamiento de conectores de corte tipo ángulo, cuando están localizados de diferente manera a la expuesta en códigos de diseño. Para ello, se consideraron conectores de corte tipo ángulo, colocados de manera perpendicular respecto a la cara del patín de la viga de acero, analizando dos tipos de posiciones (45 y 90° referente al eje longitudinal del patín). Para comprobar cuál tiene un comportamiento y resistencia adecuada, se realizaron ensayos push-out, con un total de 6 probetas por posición. Las curvas fuerza vs. deslizamiento obtenidas del conector a 45°, presentaron un comportamiento más homogéneo en todos los parámetros analizados, en comparación con las curvas obtenidas para el conector a 90°. Su óptimo rendimiento hace que el conector a 45° sea el más adecuado para implementación.

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Section: Resultados Y Discusión Curva Carga-deslizamientounclassified

“…Por otra parte, Hällmark et al, (2019) determinaron la rigidez característica de acuerdo con los valores especificados en el Eurocódigo 4 (UNE EN 1994 1-1, 2013), con la reducción de la capacidad característica en un 75 % (Ecuación 3):…”

Section: Propiedades Mecánicasunclassified

Análisis de la Resistencia a Corte de Conectores Tipo Ángulo en Losas de Hormigón Armado sobre Estructura Metálica

Franco

Martínez

Hernández³

et al. 2022

Rev. Téc. Ing. Univ. Zulia.

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“…Meglévő forgalmú infrastruktúra feletti híd építésének építéstechnológiája forgalombiztonsági és forgalomszervezési fókusza kiemelt fontosságú (Hällmark 2018;Berthellemy-Schavits-Erre 2016). Számos infrastruktúraberuházás esetén szükségessé válhat hidak építése, amelyeket a beruházástól függően eltérő nyílástartományban kell megépíteni.…”

Section: Hídépítések Meglévő Nyomvonalak Felettunclassified

Öszvérszerkezetű hidak építéstechnológiái a közlekedésbiztonság fényében

Gosztola

2023

ScientSec

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Összefoglalás. Számos meglévő infrastruktúra-beruházás esetén – legyen az felújítás, rekonstrukció vagy fejlesztés – szükségessé válhat új hidak építése, ezek közül kiemelt kérdéskör azon beruházások, ahol az áthidalandó keresztmetszet bővül és a feszített vasbeton gerendás szerkezet helyett az öszvérszerkezetű híd gazdaságilag indokolttá válik. A híd építéstechnológiája forgalombiztonsági és forgalomszervezési oldalról kulcsfontosságú. Az építés ideje alatt a forgalmat biztosítani kell, amit a hagyományos építési módnál forgalomterelés mellett lehet megtenni. A kutatásom ezért a hídépítés miatt szükséges forgalomterelések közúti biztonságával foglalkozik, illetve az új, a problémát feloldó hídépítési technológiákkal. Summary. In the case of many existing infrastructure investments – be it renovation, reconstruction or development – it may become necessary to build new bridges. The investments where the cross-section is expanded and instead of the prestressed reinforced concrete beam structure, the use of composite bridge becomes more economically. The construction technology of the steel-concrete composite bridge is crucial from the point of view of traffic safety and traffic management. Traffic must be ensured during construction, which can be done with traffic diversion in the case of the traditional construction method. My research therefore deals with road safety, the traffic diversions required due to steel-concrete composite bridge construction, and the new bridge construction technologies that solve this problem. In the reconstruction of the M1 motorway, the prefabricated prestressed reinforced concrete beam structure could be built with intermediate support, but there are several arguments in favor of abandoning the intermediate support and building steel-concrete composite bridge with single span. The strongest of these is ensuring road safety. In addition to the existing traffic, in order to avoid traffic disruption, it is necessary to avoid an intermediate support, which reduces traffic jam and waiting time. I illustrate the impact of traffic diversion on traffic safety by analyzing a previous renovation work on the M1 motorway. During the research, I compare the traffic diversion accident data with the control section. The control section is the same road section, with the same length of time, before the renovation in this study. The comparison confirms that traffic disruption should be avoided during bridge construction. It is economically justified to build steel-composite bridges, but it is necessary to deviate from the cast-in-place on concrete construction of deck slab, because it requires traffic diversion. I present new construction technologies for the construction of steel-concrete composite bridges, which can be used to ensure road safety. Overall, the raising the degree of prefabrication results in the avoidance of traffic disruption. Among construction technologies, economic aspects are typically decisive, such as the availability of human resources, capacity utilization and reduction of construction time. We developed a new construction technology for achieve the deck slab of steel-concrete composite bridges with less human resources, in a shorter time, with the available capacities, more economical construction and without traffic disruption.

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“…Especially on the issue of ultra high-performance concrete (UHPC)-steel composite member, these researches mainly focus on the subjects: negative bending moment of steel-UHPFRC composite girders (Qi et al, 2020;Hamoda et al, 2017), flexural strength of UHPC-concrete composite members (Shirai et al, 2020). In addition, there are some findings on new type of composite girders, such as the post-installed shear connector aiming to strengthen composite bridge (Hällmark et al, 2019), bending capacity of U-shaped steel-concrete composite girders (Zhou et al, 2019) and straight-side U-shaped steel-encased concrete composite girders (Yan et al, 2021). Besides, some researchers have performed the dynamic analysis of the plate structure by using FE method (Das and Gonenli, 2022;Gonenli and Das, 2021;Das et al, 2020;Sahoo and Barik, 2020;Jafarpour and Khedmati, 2020).…”

Section: Introductionmentioning

confidence: 99%

Ultimate Bending Strength Evaluation of MVFT Composite Girder by using Finite Element Method and Machine Learning Regressors

Xiong

Zhu

et al. 2022

Lat. Am. j. solids struct.

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This paper has evaluated the bending performance of a novel prefabricated MVFT steel-concrete composite girder. 9 meters pilot MVFT girder was analyzed by validated finite element model. In the pilot test, the height of web, the length of grouted concrete in the girder and net spacing between webs were parametrically modeled to discuss their effect to the bending strength. An ultimate bending strength formula has been obtained, which was based on the regression of parametric results. In the meantime, the two Machine Learning (ML) models, BP neural network and Least Squares Support Vector Machine, have been also implemented to train and then predict the ultimate strength of MVFT girder. Three factors were selected as input in ML models: the distance between steel girder's Tensile Centroid(TC) and slab's Compressive Centroid(CC), the distance between steel girder's TC and its CC, the compressive area of steel girder. After the completion of the ML training, the ultimate strength predictions of 30 meters MVFT girder by BP model and the formula have been compared, which agrees well with each other and validates their accuracy.

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Post-installed shear connectors: Push-out tests of coiled spring pins vs. headed studs

Cited by 13 publications

References 25 publications

Análisis de la Resistencia a Corte de Conectores Tipo Ángulo en Losas de Hormigón Armado sobre Estructura Metálica

Análisis de la Resistencia a Corte de Conectores Tipo Ángulo en Losas de Hormigón Armado sobre Estructura Metálica

Öszvérszerkezetű hidak építéstechnológiái a közlekedésbiztonság fényében

Ultimate Bending Strength Evaluation of MVFT Composite Girder by using Finite Element Method and Machine Learning Regressors

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