Projects regarding computational mechanics of: glass structures, wood structures and vibrations in lightweight framed buildings.

Dnr:

SNIC 2017/1-26

Type:

SNAC Medium

Principal Investigator:

Kent Persson

Affiliation:

Lunds universitet

Start Date:

2017-02-01

End Date:

2018-02-01

Primary Classification:

20301: Teknisk mekanik

Secondary Classification:

20199: Annan samhÀllsbyggnadsteknik

Webpage:

http://www.byggmek.lth.se/

Allocation

Abstract

Glass as a construction material: A key issue when using glass as a building material is how to incorporate the glass into the building construction i.e. how to make joints with suitable properties between the glass and the other materials in the building structure that may be made of concrete, steel, aluminum or wood. The main objective of the project is to experimentally and numerically investigate the mechanical performance and strength of glass joints in structural systems subjected to external loading. The project will deal with bolted and adhesive joints as well as joints that combine bolts with adhesives. There is a great need of scientific and theoretical investigations on strength design of bolted and adhesive joints, both when used for fixing glass to the building structure as well as in glass to glass joints in load carrying applications. When performing strength design of glass and glass joints, there is, from the engineers point-of-view, not very much knowledge available to design safe buildings that still are optimal with regards to material demand. To be able to build safe and competitive with glass it is important that strength design methods and criteria with scientific and technical base are available. The project is a collaboration with and co-financed from the leading Swedish glass industry. Vibrations in lightweight framed buildings: Lightweight timber constructions have a number of advantages; they are cost effective, environmental friendly and demand relatively short production duration. On the other hand, one of their main drawbacks is the annoyance of vibrations and noise. The most important source of vibration in residential and office buildings is human walking. Slender floor constructions with long spans will have low resonance frequencies that, in combination with low damping, are easily excited by human activities like walking running and jumping. Since humans are sensitive to such vibrations the floors are often being regarded as annoying. The cheapest and most efficient solution to reduce vibrations in buildings is to design the floor to have acceptable vibration levels already in the design phase. There is then a need for analysis methods that deal with human walking loads and appropriate human perception evaluation models. Recent advances in the computer area have made it justifiable to model human walking as a moving load. The main focus of this project is to study the relationship between vibrations in lightweight timber floors and human walking as well as objective evaluation methods for human perception of vibrations.