Vertical Displacements in a Medium-rise Timber Building

The history of timber buildings in Sweden entered a new era when the authorities decided to lift the ban on constructing more than two-storey timber buildings in Sweden. This change in legislation has contributed to the emergence of timber construction during the last decade.

The Cross Laminated Timber (CLT) has become recognized as a new technology that used correctly in construction gives strong and reliable structures. The building material is gaining more credit day by day mainly due to the stiffness and strength it proved throughout the tests in projects where it was used.

One of the projects that used CLT as load bearing elements was Limnologen in the city of Växjö 500 kilometres south of Stockholm. In this project, a system of CLT floors as well as CLT walls has been used. One of the challenges related to medium-rise timber buildings in general is to calculate and take account of the vertical displacement of the whole building. The sources for the displacements are instantaneous elastic as well as time dependent. In this project we are introducing two evaluation methods for the vertical displacements in Limnologen.

The first is the experimentally measured vertical displacement that was performed by a group of researchers from Växjö University, and the second is a Finite Element Model simulating the vertical displacement according to the factors and parameters thought to be important to be included in the modelling. The output of the simulation was to be compared with the experimentally obtained values. Simulation is an important way to predict the vertical displacement in future CLT buildings. All modelling were done using the finite element software Abaqus.
Source: Växjö University
Author: Zeng, Xiong yu | Ren, Su Xin | Omar, Sabri

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