Experimental assessment and damage modelling of hybrid timber beam-to-steel column connections under cyclic loads

Sirumbal-Zapata, Luis F.; Mariotti, C.; Elghazouli, A.Y.

doi:10.1016/j.engstruct.2019.109682

Cited by 14 publications

(2 citation statements)

References 52 publications

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“…The application of DIC systems in wood research spans material-level investigations (Iraola et al 2021;Jeong et al 2016;Kumpenza et al 2018;Matsuda et al 2019;Matsuda et al 2017;Totsuka et al 2022;Xavier et al 2012) to structural testing at the component level (Bakalarz et al 2023;Navaratnam et al 2020;Sirumbal-Zapata et al 2019;Timbolmas et al 2022). Within these studies, DIC is employed for a variety of purposes, including exploring damage mechanisms (Matsuda et al 2018;Matsuda et al 2017;Navaratnam et al 2020), determining mechanical properties such as Young's modulus and Poisson's ratio (Jeong et al 2016;Kumpenza et al 2018), and verifying the accuracy of finite-element analysis (FEA) (Sirumbal-Zapata et al 2019;Timbolmas et al 2022). Establishing methods to quantitatively evaluate the errors associated with DIC is essential for its effective adaptation to specific investigative needs.…”

Section: Introductionmentioning

confidence: 99%

Accuracy of digital image correlation system for compressive behaviour of wood

Teranishi,

Matsubara

2024

Preprint

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The digital image correlation (DIC) system is a powerful tool for measuring distributions of displacement and strain on the surface of a specimen. DIC systems are employed not only for homogeneous materials such as metals but also for heterogeneous materials such as wood. Although numerous validations of DIC system accuracy for metallic materials exist, accuracy verification for wood, especially under multiaxial stress conditions, is less common. This study investigated the accuracy of a DIC system equipped with a bilateral telecentric lens on wood (Douglas fir). The accuracy verification in uniaxial stress fields was conducted through full compression testing, while verification in multiaxial stress fields was performed through partial compression testing. Additionally, compression tests on A6063 (aluminium alloy) were conducted to examine the differences in DIC system accuracy between homogeneous and heterogeneous materials. The accuracy of the DIC system was assessed by comparing the results with those obtained from strain gauges. The results from the full compression tests indicate that the accuracy of axial strain measured by the DIC system was comparable for the specimens of A6063 and Douglas fir in the longitudinal (L) direction but was inferior for Douglas fir in the radial (R) direction. Furthermore, the differences in Young’s modulus obtained from the DIC system and strain gauge for the specimens of A6063, Douglas fir (L), and Douglas fir (R) were 2.3%, 2.4%, and 13.7%, respectively. In the partial compression tests, the accuracy of equivalent strain measured by the DIC system in the specimens of Douglas fir (R) was lower than that in A6063, attributable to a high strain gradient in the attachment region of the strain gauge. A novel variable was proposed using the standard deviation of strain to evaluate this strain gradient within the region. This variable demonstrated correspondence to the difference in equivalent strain obtained from the DIC system and the triaxial strain gauge, regardless of the material’s homogeneity or heterogeneity.

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Section: Introductionmentioning

confidence: 99%

Accuracy of digital image correlation system for compressive behaviour of wood

Teranishi,

Matsubara

2024

Preprint

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“…Alternatively, the connection itself could dissipate the energy by introducing a steel component with reasonable ductile behaviour. Various types of connections that can dissipate seismic energy have been proposed, such as perforated plates [2], top and seat angle connections [3], wooden elements connected to steel stubs [4], Glulam post-to-beam connections reinforced by dowel-type fasteners [5], connections with three separate steel box sections [6], and prestressed timber beam-column connections [7]. Despite these solutions, the ideal type of connection for timber mass buildings would have replaceable sacrificial elements to reduce downtime and rehabilitation costs, as a lesson learned from the 2010-2011 Christchurch earthquake series [8].…”

Section: Introduction 567mentioning

confidence: 99%

Experimental Investigation of an Innovative Beam-to-Column Connection Under Cyclic Loading

Mowafy

Imanpour

Chui

et al. 2023

World Conference on Timber Engineering (WCTE 2023)

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The mechanical behaviour of steel is crucial in hybrid steel-timber systems, especially in areas prone to seismic activity. This paper presents a study of a novel semi-rigid connection that employs U-shaped steel plates as seismic fuses in a beam-to-column connection. The connection aims to introduce self-centring steel braced frames as lateral systems, combined with mass timber structures as a gravity load-resisting system, to enhance their structural performance against earthquakes. The fuses are designed to yield in axial compression or tension, with a bending combination that enables the connection to produce yielding at a specific moment level. The study focuses on the results obtained from cyclic fuse testing, connection testing, and comparing the connections to existing solutions to demonstrate their potential as a reliable and resilient option for mass timber buildings in seismic areas. The findings indicate that the developed connections provide reliable ductile behaviour, and timber elements can be protected from damage through the capacity protection provided by the fuses and their yielding mechanism.

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