An innovative shear-tension angle bracket for Cross-Laminated Timber structures: Experimental tests and numerical modelling

2019 ◽  
Vol 197 ◽  
pp. 109434
Author(s):  
Giuseppe D'Arenzo ◽  
Giovanni Rinaldin ◽  
Marinella Fossetti ◽  
Massimo Fragiacomo
Keyword(s):  
Numerical Modelling ◽  
Experimental Tests ◽  
Timber Structures ◽  
Cross Laminated Timber

scholarly journals Numerical Modelling Analysis of Angle Bracket Connections Used in Cross Laminated Timber Constructions

2019 ◽  
pp. 421-428
Author(s):  
Saeed Rezvani ◽  
Lina Zhou
Keyword(s):  
Failure Modes ◽  
Numerical Models ◽  
Three Dimensional ◽  
Experimental Tests ◽  
Load Resistance ◽  
Timber Structures ◽  
Cross Laminated Timber ◽  
Finite Element Software ◽  
Modelling Analysis ◽  
Mass Timber

Connections are arguably one of the most critical components controlling the structural performance and failure modes of mass timber structures. Over the last two decades, demands for stronger and energy dissipative connections have been raised with increased application of mass timber products in larger and taller buildings. This paper presents numerical analyses of novel mass timber connections used in cross laminated timber structures. The connections are developed by MyTiCon with BB Stanz- und Umformtechnik GmbH angle bracket. Despite being relatively thin, these angle brackets could show comparable load resistance with thicker ones due to the reinforced web and folded edges. The commercially available finite element software ABAQUS was used to develop three dimensional (3D) numerical models to simulate the performance of angle bracket connections under different load combinations. The modelling analysis involves two phases: (1) to determine the most efficient fastener type and setup for the angle brackets connected to CLT wall and floor panels, and (2) to evaluate the capacity of angle brackets connected to CLT wall and floor panels in various loading scenarios. The findings of this study provide an insight into the behaviour of this new angle bracket connections and will be used in the design of the experimental tests in the next phase.

Comparative dynamic investigation of cross-laminated wooden panel systems: Shaking-table tests and analysis

2017 ◽  
Vol 21 (10) ◽  
pp. 1421-1436 ◽  
Author(s):  
Viktor Hristovski ◽  
Violeta Mircevska ◽  
Bruno Dujic ◽  
Mihail Garevski
Keyword(s):  
Energy Dissipation ◽  
Earthquake Engineering ◽  
Dynamic Properties ◽  
Seismic Energy ◽  
Experimental Tests ◽  
Shaking Table ◽  
Shaking Table Tests ◽  
Equivalent Viscous Damping ◽  
Cross Laminated Timber ◽  
Engineering Seismology

Cross-laminated timber has recently gained great popularity in earthquake-prone areas for construction of residential, administrative, and other types of buildings. At the Laboratory of the Institute of Earthquake Engineering and Engineering Seismology in Skopje, comparative full-scale shaking-table tests of cross-laminated timber panel systems have been carried out as a part of the full research program on the seismic behavior of these types of wooden systems, realized by Institute of Earthquake Engineering and Engineering Seismology, Skopje, and the Faculty of Civil and Geodetic Engineering (UL FCG), University of Ljubljana. Two different specimens built of cross-laminated timber panels have been tested: specimen containing a pair of single-unit principal wall elements (Specimen 1) and specimen containing a pair of two-unit principal wall elements (Specimen 2). In this article, the results from the shaking-table tests obtained for Specimen 2 and numerically verified by using appropriate finite element method–based computational model are discussed. Reference is also made to the comparative analysis of the test results obtained for both specimens. One of the most important aspects of the research has been the estimation of the seismic energy-dissipation ability of Specimen 1 and 2, via calculation of the equivalent viscous damping using the performed experimental tests. It is generally concluded that Specimen 2 exhibits a similar rocking behavior as Specimen 1, with similar energy-dissipation ability. Both specimens have manifested slightly different dynamic properties, mostly because Specimen 2 has been designed with one anchor more compared to Specimen 1. Forced vibration tests have been used for identification of the effective stiffness on the contacts for Specimen 2. This research is expected to be a contribution toward clarification of the behavior and practical design of cross-laminated timber panel systems subjected to earthquake loading.

Contact shear stresses in dowel-type joints with expansive kits of timber structures

2016 ◽  
Vol 231 (1) ◽  
pp. 140-149
Author(s):  
Jose G Fueyo ◽  
Manuel Domínguez ◽  
Jose A Cabezas
Keyword(s):  
Experimental Tests ◽  
Element Model ◽  
Shear Stresses ◽  
Load Carrying Capacity ◽  
Timber Structures ◽  
Expansion Process ◽  
Global Response ◽  
Load Carrying ◽  
Overall Performance ◽  
The Relationship

This paper studies the shear stresses appearing in the contact zones of dowel-type joints of timber structures using expansive kits. To achieve this goal, a finite element model capable of determining the effect of using these kits on the global response of the joint has been prepared. For its development, different tools have been used to model the expansion process, the contact between the different parts of the joint, the compression pressures triggered by this contact, the resulting shear stresses caused by friction and, finally, the effect of all these circumstances on the overall performance of the joint, especially on the relationship between the applied load and the related displacement. The design of the model has been checked for correctness using experimental tests. The results obtained show that the use of expansive kits slightly improves the load-carrying capacity of the dowel through the rope effect.

An Experimental Testing of Fillet Welded Specimens

2015 ◽  
Vol 752-753 ◽  
pp. 412-417 ◽  
Author(s):  
Martin Krejsa ◽  
Jiri Brozovsky ◽  
David Mikolasek ◽  
Premysl Parenica ◽  
Libor Zidek ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Stress Analysis ◽  
Numerical Models ◽  
Experimental Testing ◽  
Fem Analysis ◽  
Experimental Tests ◽  
Strength Characteristics ◽  
Fillet Welds ◽  
Commercial Software

The paper describes the experimental tests of steel bearing elements, which were aimed at obtaining material, geometric and strength characteristics of the fillet welds. Preparation of experiment consisted in defining of numerical models of tested samples using FEM analysis and the commercial software ANSYS. Data obtained from described experimental tests are necessary for further numerical modelling of stress analysis of steel structural supporting elements.

Glass beams reinforced with GFRP laminates: Experimental tests and numerical modelling using a discrete strong discontinuity approach

2015 ◽  
Vol 99 ◽  
pp. 253-263 ◽  
Author(s):  
P. Neto ◽  
J. Alfaiate ◽  
L. Valarinho ◽  
J.R. Correia ◽  
F.A. Branco ◽  
...  
Keyword(s):  
Numerical Modelling ◽  
Experimental Tests ◽  
Strong Discontinuity

scholarly journals Experimental study on flexural properties of timber columns with interior notches in traditional Japanese timber structures

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Zherui Li ◽  
Hiroshi Isoda ◽  
Akihisa Kitamori ◽  
Takafumi Nakagawa ◽  
Yasuhiro Araki ◽  
...  
Keyword(s):  
Bending Strength ◽  
Experimental Tests ◽  
Point Load ◽  
Flexural Properties ◽  
Timber Structures ◽  
Load Bearing Capacity ◽  
Bending Tests ◽  
Notch Width ◽  
Different Types ◽  
The Mean

AbstractIn this study, the columns with interior notches in traditional Japanese timber frames were selected as the research object, and static bending tests were performed to investigate the effect of interior notches on the flexural properties of columns. First, the bending behaviors of columns under three-point and four-point load configurations were compared to obtain a suitable referenced strength of a column without notches. The reduction in the load-bearing capacity of columns with different types of interior notches in traditional Japanese timber structures was determined through experimental tests and statistical analysis. The results indicated that the mean bending strength of columns with three different notch types was consistent with those without notches, the continuous timber on both sides of the notch had a beneficial effect on maintaining a higher strength and reducing the stress intensity around the notch. The fracture position and the standard deviation of the bending strength were affected not only by the notch depth, but also by the notch width on the tensile side of the column.

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