Cyclic response of insulated steel angle brackets used for cross-laminated timber connections

Kržan, Mojca; Azinović, Boris

doi:10.1007/s00107-020-01643-5

Cited by 18 publications

(4 citation statements)

References 24 publications

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“…Numerous researchers have studied these lateral resisting elements. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] Firstly, various handcrafted notch geometries of corner joints (e.g., Saddle, Norwegian, Daimon, and Dovetail notch) were proposed and their performance was investigated under in-plane lateral loads. [7][8][9] Then, the lateral load resistance of the standard half lapped, and dovetail corner joints of modern log houses were examined via experiments, [10,12,13] numerical methods, [12][13][14][15] and analytical methods.…”

Section: Introductionmentioning

confidence: 99%

“…[16] In addition, the two main types of LF connections were investigated, including a sill log element on various floor types [7,17,18] and angle brackets. [10,11] In the case of log-log friction, the friction coefficients under various vertical loads and sliding characteristics between timber log layers were studied experimentally, [12,19] and it was found that the sliding characteristic between layers of log elements could not be included in the lateral load resistance prediction [10] because of its sensitivity to various parameters. Some previous works [9,[21][22][23] also focused on the improvement of the lateral load resistance between log layers using reinforcement material.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of lateral resisting elements for the wood polyvinyl chloride composite log‐house under in‐plane lateral loads

Eakintumas

Pulngern

Rosarpitak³

et al. 2021

Vinyl Additive Technology

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This study applied WPVC composite materials as log elements and investigated the lateral load resistance capability using two first log-foundation connections (LS-SST and LF-AB) and two corner joints (CJ-SN and CJ-SHL) subjected to monotonic and cyclic loads via an experimental approach. The obtained results indicated that the load resisting behavior of the connections was different, although the load bearing area of the connections was similar. The LF-SST connections experienced a brittle failure, while LF-AB showed a ductile failure. The premature failure occurred at the hollow web section of orthogonal log elements for both corner joints. The presence of a metal fastener directly affected the lateral load resisting behavior of the connection, especially under cyclic loading.The equivalent energy elastic plastic (EEEP) and hysteretic parameters were determined, indicating that LF-AB provided 1.8 times of ductility ratio and 35.4% of hysteretic energy higher than LF-SST, and that CJ-SHL had 3.1 and 2.8 times of monotonic and cyclic stiffnesses higher than CJ-SN. In comparing the experimental results with timber log elements, the hollow section of the WPVC composite log element had a negligible effect on load resisting behavior; however, it significantly affected the load resisting capacity, stiffness, damping, and premature failure. The experimental data and the proposed parameters will be useful for the further design of WPVC composite log houses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental investigation of lateral resisting elements for the wood polyvinyl chloride composite log‐house under in‐plane lateral loads

Eakintumas

Pulngern

Rosarpitak³

et al. 2021

Vinyl Additive Technology

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“…The first was a perfect elasto-plastic model (EPM) [13,21]. Although this method was originally proposed for analyzing wood-frame structures, there are many examples of researchers applying it to joint analyses [22][23][24][25]. The method for determining the yield load is illustrated in Fig.…”

Section: Yield Loadmentioning

confidence: 99%

Comparison of the elastic limit and yield load of nailed joints connecting solid wood and wood-based board material

2022

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Evaluations of the lateral properties of timber joints are necessary to ensure the safety of timber buildings. The yield load is an important property that is usually obtained using authorized engineering techniques. Although yield loads have been easily obtained using authorized techniques, events that have occurred in the joint during yielding have not been clarified. This study experimentally obtains elastic limit data using nailed joints. Mechanical tests measuring the residual displacement after various lateral loads with six-joint specimen specifications were conducted. In this study, the load at which the residual displacement reached 5% of the nail diameter was defined as the elastic limit. The experimentally obtained elastic limits were compared with the yield loads obtained using authorized engineering techniques. The ratios of elastic limits to the yield loads obtained using the perfect elasto-plastic model, method described in EN, and 5% offset method were 0.554–0.743, 0.557–0.834, and 0.648–0.801, respectively. The results numerically revealed that residual displacements occurred at a much lower load than the yield loads.

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“…Since the range of possible loading rates is wide, our recent experimental campaign with CLT panels also investigated the effect of loading rate on the response of panels. The aim of the campaign was to investigate the behaviour of CLT panels (2490/2490/100 mm 3-layer) connected to CLT slabs with special insulated angle-bracket connections that can withstand both shear and tensile forces [19], as well as the influence of different sound insulation layers under the panels on the response. More detailed information about the entire experimental campaign and the results can be found in [20].…”

Section: Influence Of the Loading Rate On The Behaviour Of Clt Shear ...mentioning

confidence: 99%

In-plane lateral testing of timber based shear walls and the influence of loading rate

Azinović¹,

Kržan²,

Pazlar³

2021

1st Croatian Conference on Earthquake Engineering

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In-plane lateral tests of timber based shear walls (e.g. light-frame or cross laminated timber walls) are the basis for the derivation of mechanical parameters required for the seismic and wind design (lateral load-bearing and displacement capacity, stiffness, ductility, etc.). The currently available testing standards, such as ISO 21581, do not provide explicit criteria for some testing parameters and boundary conditions, which are left to be decided upon with regard to the designated purpose of the tests. Racking tests can serve for evaluation of shear behaviour of the panels themselves or of the structural system as in actual conditions. In dependence of different aspect ratio and position in the structure (e.g. upper or lower building storey resulting in different vertical loads and boundary conditions), the behaviour of the panels can be mainly shear, rocking or combined shear-rocking. In the paper, the experience and conclusions of in-plane shear testing from various experimental campaigns conducted at the Slovenian National Building and Civil Engineering Institute are presented. Furthermore, the influence of the loading rate on the recently tested cyclic response of two variations of cross laminated timber wall systems is investigated. It was found and confirmed that the loading rate influences not only the lateral load-bearing capacity, but also the energy dissipation, which is crucial for seismic resistance of structures. The work is relevant for the purpose of understanding the influence of different test setup variations, panel and connections characteristics and loading protocols on the seismic response of timber shear walls. The research is therefore aimed towards a valid comparison of results from different testing campaigns and between different laboratories.

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Cyclic response of insulated steel angle brackets used for cross-laminated timber connections

Cited by 18 publications

References 24 publications

Experimental investigation of lateral resisting elements for the wood polyvinyl chloride composite log‐house under in‐plane lateral loads

Experimental investigation of lateral resisting elements for the wood polyvinyl chloride composite log‐house under in‐plane lateral loads

Comparison of the elastic limit and yield load of nailed joints connecting solid wood and wood-based board material

In-plane lateral testing of timber based shear walls and the influence of loading rate

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