Johan Vessby

Forskning

Den forskning jag bedriver är inriktad på att utveckla metoder och modeller för att bättre förstå och beskriva trä som lastbärande material. Ofta används kombinationen av avancerade numeriska modeller och experimentella försök i syfte att förstå och beskriva komplexa fenomen som uppträder då trämaterialet belastas.

Publikationer

An experimental analysis of full scale light-frame timber modules
Rajan Maharjan, Le Kuai, Johan Vessby, Sigurdur Ormarsson, 2024
Numerical and experimental investigations of cracked light-frame timber walls
Le Kuai, Rajan Maharjan, Sigurdur Ormarsson, Johan Vessby, 2024
Numerical and experimental investigations of prefabricated light-frame timber modules
Le Kuai, Sigurdur Ormarsson, Johan Vessby, 2024
Bending properties of 100 narrow clt-based boards – static and dynamic tests and DIC analysis
Mikael Perstorper, Johan Vessby, Emil Lockner, 2023
Evaluation of hardening models to simulate joints in timber shear walls
Rajan Maharjan, Johan Vessby, Le Kuai, 2023
FE-modeling of long-term creep behavior in CLT-beams loaded in bending
Le Kuai, Johan Vessby, Sigurdur Ormarsson, 2023
Load levels and critical design issues in a multi-storey residential timber building built up by prefabricated volumetric elements
Johan Vessby, Tomas Forsberg, Marie Johansson, Rajan Maharjan, 2023
Nonlinear FE-analysis and testing of light-frame timber shear walls subjected to cyclic loading
Le Kuai, Sigurdur Ormarsson, Johan Vessby, 2023
Pilot test of short- and long-term transverse properties of horizontal rails made from clt cut-offs
Mikael Perstorper, Johan Vessby, 2023
Pilot test of short- and long-term transverse properties of horizontal rails made from CLT cut-offs
Mikael Perstorper, Johan Vessby, 2023
Structural use of cut-offs from clt-production – three examples that utilize the unique properties
Johan Vessby, Mikael Perstorper, Florian DeMonte, Jacob Eriksson, 2023
Substructure modelling of full size timber modules
Rajan Maharjan, Johan Vessby, 2023
Vertical relative displacements in prefabricated timber modules during loading in laboratory environment
Johan Vessby, Rajan Maharjan, Mikael Perstorper, 2023
A numerical and experimental investigation of non-linear deformation behaviours in light-frame timber walls
Le Kuai, Sigurdur Ormarsson, Johan Vessby, Rajan Maharjan, 2022
A three-dimensional numerical analysis of moisture flow in wood and of the wood's hygro-mechanical and visco-elastic behaviour
Sara Florisson, Johan Vessby, Sigurdur Ormarsson, 2021
Analysis of hygro-mechanical behavior of wood in bending
Sara Florisson, L. Muszynski, Johan Vessby, 2021
Design Of Innovative Modular-Based Timber Structure Based On Advanced Modeling And Full-Scale Tests
Sigurdur Ormarsson, Johan Vessby, Marie Johansson, 2021
Impact Of Eccentricity In Bracing Supports On Lateral Instability Of Long-Span Timber Trusses
Johan Vessby, Sigurdur Ormarsson, Petr Sejkot, 2021
Modelling And Experimental Verification Of Light-Frame Timber Modules Loaded In Shear
Le Kuai, Sigurdur Ormarsson, Johan Vessby, 2021
Numerical out-of-plane stability analysis of long span timber trusses with focus on buckling length calculations
Petr Sejkot, Sigurdur Ormarsson, Johan Vessby, Bo Kallsner, 2020
Three-dimensional orthotropic nonlinear transient moisture simulation for wood - analysis on the effect of scanning curves and nonlinearity
Sara Florisson, Johan Vessby, Winston Mmari, Sigurdur Ormarsson, 2020
A numerical study of the effect of green-state moisture content on stress development in timber boards during drying
Sara Florisson, Sigurdur Ormarsson, Johan Vessby, 2019
Modelling of mechano-sorption in clear wood by using an orthotropic non-linear moisture flow and stress model
Sara Florisson, Sigurdur Ormarsson, Johan Vessby, 2018
Numerical and experimental study of punched metal plate connection used for long-span pitched timber roof truss structure
Petr Sejkot, Sigurdur Ormarsson, Johan Vessby, 2018
Numerical Simulation of Moisture-Induced Crack Propagation in Dowelled Timber Connection Using XFEM
Tadios Habite, Sara Florisson, Johan Vessby, 2018
Path dependence in OSB sheathing-to-framing nailed connection revealed by biaxial testing
Thomas K. Bader, Johan Vessby, Bertil Enquist, 2018
Constrained displacement boundary condition in embedment testing of dowel-type fasteners in LVL
Michael Schweigler, Thomas K. Bader, Johan Vessby, Josef Eberhardsteiner, 2017
Modeling displacement path dependence in nailed sheathing-to-framing connections
Thomas K. Bader, Johan Vessby, 2017
Numerical and experimental study of punched metal plate connections to obtain spring stiffness needed for 3D buckling analysis of long-span timber trusses
Petr Sejkot, Sigurdur Ormarsson, Johan Vessby, 2017
Geometric nonlinear analysis of a pitched roof structure of wood
Sigurdur Ormarsson, Johan Vessby, 2016
Numerical analysis of failure modes and force distribution in a pitched roof structure of wood
Sigurdur Ormarsson, Johan Vessby, Bo Källsner, Ivan Filchev, 2016
Stabilisering av takkonstruktioner i trä - arbetet med ny handbok
Johan Vessby, Bo Källsner, Sigurdur Ormarsson, 2016
Determination of Load Bearing Capacity for Spatial Joint with Steel Angle Brackets
Petr Sejkot, Sigurdur Ormarsson, Johan Vessby, P. Kuklik, 2015
Ambient vibration testing and modal analysis of multi-storey cross-laminated timber buildings
Thomas Reynolds, Åsa Bolmsvik, Johan Vessby, Wen-Shao Chang, Richard Harris, Jonathan Bawcombe, Julia Bregulla, 2014
Directional dependency in an OSB sheathing-to-framing mechanical connection
Johan Vessby, Bertil Enquist, Bo Källsner, 2014
Evaluation of softening behaviour of timber light-frame walls subjected to in-plane forces using simple FE models
Johan Vessby, Bo Källsner, Anders Olsson, Ulf Arne Girhammar, 2014
Long term in-situ measurements of displacement, temperature and relative humidity in a multi storey residential CLT building
Erik Serrano, Bertil Enquist, Johan Vessby, 2014
Modeling of fracture in the sill plate in partially anchored shear walls
Erik Serrano, Johan Vessby, Anders Olsson, 2012
Simulation of bottom rail fracture in partially anchored shear walls using XFEM
Johan Vessby, Erik Serrano, Anders Olsson, Ulf Arne Girhammar, Bo Källsner, 2012
Analysis of shear wallsfor multi-storey timber buildings
Johan Vessby, 2011
Contact-free measurement and numerical and analytical evaluation of the strain distribution in a wood-FRP lap-joint
Johan Vessby, Erik Serrano, Bertil Enquist, 2010
Influence of contact stress between sheets on strength and stiffness of timber frame shear walls
Johan Vessby, Bo Källsner, Ulf Arne Girhammar, 2010
Vertical relative displacements in a medium-rise CLT-building
Erik Serrano, Bertil Enquist, Johan Vessby, 2010
Experimental study of cross-laminated timber wall panels
Johan Vessby, Bertil Enquist, Hans Petersson, Tomas Alsmarker, 2009
Contact-free strain measurement of bi-axially loaded sheathing-to-framing connection
Johan Vessby, Anders Olsson, Bertil Enquist, 2008
Influence of initial gap between timber members on stiffness and capacity of shear walls
Johan Vessby, Bo Källsner, Anders Olsson, 2008
Shear walls for multi-storey timber buildings
Johan Vessby, 2008
Stabilizing strategies for multi-story timber frame structures
Johan Vessby, Anders Olsson, 2006