Ida minskar svajet i höga trähus
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Ida reduces the swing in tall timber buildnings

Published: 20 August 2019

More and higher timber buildnings are being built in Sweden than in a very long time. With higher housings, and due to the low weight of timber, dynamic oscillations and acceleration levels can create problems. It simply sway. Roughly sometimes if it blows hard. The researcher Ida Edskär at Luleå University of Technology has the solution to the problem.

- Historically, we have built many wooden houses, but never as high as now. That it swaying at the top can be a challenge. In my thesis I have produced some concrete tips and advice, guidelines, for architects and designers, with how to handle the problems, says Ida Edskär, who recently defended her thesis on the subject of wooden building at Luleå University of Technology.

In Sweden, residential buildings of wood are now being built with about 6-8 floors, many as high as up to 35 meters. In Norway, the world's tallest wooden house has recently been built, the Mjø Tower, which was 81 meters high. The building contains housing, hotels and offices. Ida Edskär participated in the preliminary study for this prestige project.

"There are three different building systems for the construction of wooden houses. In my research, I have focused on two of these, KL-wooden systems and column beam systems, and generally for both, it can be said that weight at the top of the building reduces the sway", says Ida.

Swinging buildings provide a subjective experience for different individuals. Some become seasick and others notice nothing at all.

"What I really want to highlight is the importance of collaboration between architect and constructor in the design of tall wooden houses. As an example of a solution to this problem, one could put a bath basin or something else that gives heavy weight to the top of the building", concludes Ida Edskär, new technical doctor.

In the media:

Ida Edskär

Edskär, Ida -

Organisation: Department of Civil, Environmental and Natural Resources Engineering
Room: F967 - Luleå»