Cyclic Behavior of CLT Wall Systems: Experimental Tests and Analytical Prediction Models

Gavrić, Igor; Fragiacomo, Massimo; Ceccotti, Ario

doi:10.1061/(asce)st.1943-541x.0001246

Cited by 206 publications

(130 citation statements)

References 11 publications

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“…The aim of this research project was to develop seismic resistant sustainable multi-storey timber buildings made of prefabricated cross-laminated panels. Within this project, racking tests of wall panels with different layouts of connections and openings (Ceccotti et al 2006;Gavric et al 2014a) and pseudo-dynamic tests of a full scale one-storey building were performed (Lauriola and Sandhaas 2006). Next, shaking table tests of a three-storey (Ceccotti 2008) and a seven-storey building were carried out in 2006 and 2007, respectively, the latter one being conducted at the world's largest seismic testing facility (E-Defense) in Miki, Japan.…”

Section: Introductionmentioning

confidence: 99%

Cyclic behavior of typical screwed connections for cross-laminated (CLT) structures

2015

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This paper presents the results of an extensive experimental programme on typical cross-laminated timber (CLT) screwed connections conducted at CNR-IVALSA research institute. In-plane monotonic and cyclic shear and withdrawal tests were performed on screwed wall-to-wall, floor-to-floor and wall-to-floor CLT connections. Mechanical properties such as strength, stiffness, energy dissipation, ductility ratio and impairment of strength were evaluated. The experimental results showed good performance of CLT screwed joints under cyclic loads when ductile behaviour was achieved. Brittle response occurred only in cases where requirements for end and edge distances were not satisfied. The experimental characteristic shear strength and mean slip modulus of the connections were compared with values obtained using analytical design equations. The Eurocode 5 (EC5) formulas overestimated the characteristic strength values in some cases, while the Uibel and Blaß formulas specifically developed for CLT connections provided more accurate and conservative predictions. In cases where brittle failures were attained, the analytical values overestimated the experimental ones. This issue can be avoided when the requirements for minimum edge and end distances stated by EC5 are fulfilled. EC5 empirical formulas for the prediction of the screw connection slip modulus at serviceability limit state corresponded well with the experimental elastic values. The overstrength factor, which is of great importance in capacity-based design, was also evaluated, and a conservative value of 1.6 can be recommended for screwed CLT connections.

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Section: Introductionmentioning

confidence: 99%

Cyclic behavior of typical screwed connections for cross-laminated (CLT) structures

2015

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“…Figures 3 to 6 summarize typical comparisons between predictions obtained with the numerical modelling approach implemented in this study and the experimental results described in previous studies. () To this end, Figure 3 presents the calibration of nonlinear springs to a BMF 90×48x3×116 mm angle bracket and a HTT22 hold‐down connector. Similarly, the numerical and experimental hysteretic force‐displacement relationships and cumulative dissipated energy corresponding to a single‐panel CLT wall tested by Gavric et al under cyclic conditions are presented in Figure 4.…”

Section: Seismic Design and Modelling Assumptionsmentioning

confidence: 99%

“…OpenSees Experiment (C) Experimental with the numerical modelling approach implemented in this study and the experimental results described in previous studies. 5,8,9,19,40,41 To this end, Figure 3 Figure 5 depicts the numerical and analytical cyclic responses of Specimen 2.1 in the same study. This wall incorporated a half-lap joint with HBS 8×80 mm self-threaded screws simulated by means of nonlinear vertical springs as depicted in Figure 5A.…”

Section: Dissipated Energy [Kj]mentioning

confidence: 99%

“…() Shear wall tests on various joints and panel configurations as well as shake‐table experimentation on full‐scale 3‐ and 7‐storey CLT buildings were conducted as part of this project. Similarly, Gavric et al() report on the results from a large number of experiments on different CLT shear wall configurations under cyclic lateral loads. Other experimental campaigns also aimed at characterizing the lateral response of CLT buildings are included.…”

Section: Introductionmentioning

confidence: 98%

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Seismic drift demands in multi‐storey cross‐laminated timber buildings

Demirci

Mariotti

Macorini

2017

Earthq Engng Struct Dyn

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This paper investigates the seismic response of multi-storey cross-laminated timber (CLT) buildings and its relationship with salient ground-motion and building characteristics. Attention is given to the effects of earthquake frequency content on the inelastic deformation demands of platform CLT walled structures. The response of a set of 60 CLT buildings of varying number of storeys and panel fragmentation levels representative of a wide range of structural configurations subjected to 1656 real earthquake records is examined. It is shown that, besides salient structural parameters like panel aspect ratio, design behaviour factor and density of joints, the frequency content of the earthquake action as characterised by its mean period has a paramount importance on the level of nonlinear deformations attained by CLT structures. Moreover, the evolution of drifts as a function of building to ground-motion periods ratio is different for low and high-rise buildings. Accordingly, nonlinear regression models are developed for estimating the global and inter-storey drifts demands on multi- storey CLT buildings. Finally, the significance of the results is highlighted with reference to European seismic design procedures and recent assessment proposals

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“…. In den Jahren 2010 und 2011 wurde von denselben Beteiligten eine weitere Versuchsreihe zur Untersuchung der Verbindungsmittel, die im Projekt SOFIE verwendet wurden, durchgeführt .…”

Section: Experimentelle Versucheunclassified

Bemessung von Gebäuden in Brettsperrholzbauweise unter Erdbebenbeanspruchung

Andreolli¹,

Tomasi

2016

Bautechnik

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Bei Brettsperrholz (BSP) handelt es sich um ein Massivholzprodukt, welches in Europa seit mehr als zehn Jahren erfolgreich hergestellt und verwendet wird. Die Vorteile in Bezug auf das Tragverhalten, einen konstruktionsbedingt schnelleren Bauablauf und zunehmende qualitative Anforderungen haben zu einer breiten Anwendung dieses Massivholzprodukts im Wohnungsbau geführt. In diesen Gebäuden erfolgt die Aussteifung gegenüber horizontal einwirkenden Kräften wie Wind und Erdbeben über die Wandscheiben der einzelnen Geschosse, wobei die auftretenden Kräfte (Schubfluss und abhebende Kräfte) mittels metallischen Verbindungsmitteln (Schubwinkel und Zuganker) in die Unterkonstruktion eingeleitet werden. Der Einsatz von mechanischen Verbindungsmitteln wie Nägel und Schrauben in den Fugen (Wand–Wand und Wand–Decke) verleiht dem Gebäude ein in sich steifes Tragverhalten. In den folgenden Abschnitten wird das Grundkonzept für die Bemessung von BSP‐Gebäuden gegenüber Horizontallasten veranschaulicht. Insbesondere wird auf das Tragverhalten der Anschlusssysteme und dabei auf die jüngsten Forschungsprojekte, die im Bereich der theoretischen und experimentellen Untersuchungen an der Universität Trient durchgeführt wurden, eingegangen. Die praktische Anwendung der durchgeführten Forschungsarbeiten wurde durch die Entwicklung eines Software‐Tools für die Bemessung von mehrgeschossigen BSP‐Gebäuden ermöglicht.

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Cyclic Behavior of CLT Wall Systems: Experimental Tests and Analytical Prediction Models

Cited by 206 publications

References 11 publications

Cyclic behavior of typical screwed connections for cross-laminated (CLT) structures

Cyclic behavior of typical screwed connections for cross-laminated (CLT) structures

Seismic drift demands in multi‐storey cross‐laminated timber buildings

Bemessung von Gebäuden in Brettsperrholzbauweise unter Erdbebenbeanspruchung

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