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This Masters Thesis’ purpose is to evaluate a number of methods used for dimensioning in order to avoid unwanted sway and vibrations in a light weight steel floor structure. The design methods studied in this report are done by Ohlsson, Hu, Onysko, Talja and ISO (no calculations or measurments are made for ISO). The study shows that there is no big difference in the longest span allowed by the stu
In the period between 1940s and 1970s the widespread practice in Sweden was to use non-stainless steel reinforcement in masonry walls. In many cases cracks started to appear in joints above openings in these walls because of corrosion of the reinforcement. The largest problem is that the appearance of damaged buildings deteriorates and there is a risk of bricks falling down and rain water penetrat
This Master’s Thesis investigates whether expansion joints should be placed between fields of ceramic tiles, which are recommended by distributors today. This thesis concludes that expansion joints do not relieve in-plane stresses in ceramic tile coverings attached with the thin-set method. As shear stresses in the adhesive layer in the vicinity of expansion joints can reach critical levels, using
When designing concrete structures, there are great demands made on quality and service life of the construction, and for this the size of concrete cover is crucial. The concrete cover protects the reinforcement bars from carburization and from infiltration of chlorides, which make them corrode. When using today’s codes while designing, a thick concrete cover will yield a large crack width, which
Analysis and design of a frame can be done in two principally different ways. The first method, calculation according to first order elastic theory, is based on buckling lengthsand interaction relations. The advantage with this method is its simplicity. The difficulty lies in the determination of buckling lengths. The second method, calculation according to second order elastic theory, results in
This report shows how an non-insulated sheet metal roof behaves when it is exposed to varying temperatures. What happens is that the sheet metal expands and contracts which can lead to damages in the sheet metal fasteners. This causes problems when the roof is ment to stabilize for horisontal forces on the building. This report focuses on a specific construction type that is the most commun in the
The wind effects on high rise buildings were studied by finding and reading books, articles and studying equations. This was done to calculate the first natural frequency of high rise buildings, wind induced acceleration on high rise buildings and how the comfort criteria of acceleration performing on high rise buildings acts on human bodies living in the building. The buildings that were studied
Composite steel and concrete structures can resist a fire, mostly because of the thermal properties of the concrete. This report examines a composite beam, HPC-beam, when the beam is exposed to standardized fire. The beam is designed after Eurocode and the Swedish national document. The material parameters are taken from the same sources. These material parameters are used as input data for applic
Syftet med rapporten är att kartlägga och analysera hur värdeflödet i samband med platsgjutning av en stomme fungerar idag, med avseende på bland annat arbetsfördelning, genomloppstider, resursanvändning, mellanlagring och informationsflöde. En utvärdering görs av hur metoderna Activity sampling och Värdeflödesanalys fungerar för kartläggning inom byggbranschen och hur resultaten från studier med
Tall buildings have lately become a problem to design because of the development of light weighted steel frames and wind loads. An important task of a structure is the absorption of horizontal loads and the capacity to transfer the resulting moment down into the ground. It is the engineer’s task to make sure that the structure’s performance is sufficient when it comes to safety and serviceability.
Problems considering vibrations influence on comfort and health have been known for long and extensive efforts have been carried out to describe them. However, the appearance of these problems in the appliance of concrete slabs is a new phenomenon which started to arise due to the development of prestressing. For this thesis some of the existing knowledge has been applied to determine the maximal
This Master Thesis has been written in coliabaration with Modulenthus and Lund Institute of Teclnology. This thesis has two pm-poses: To show how a VR-mode! best can be created by evaluating different programs and to examine the compatibility between ADT and Archicad.
Dagens byggande av bostäder präglas av ökade krav på kortare byggtider, lägre byggkostnader och en jämn och hög kvalitet. Miljötänkande har också fått en allt högre prioritet. De ökade kraven har medfört olika typer av satsningar på att förbättra material, teknik och metoder för att bygga villor. En tydlig linje i denna utveckling har varit en ökad användning av förtillverkade komponenter och elem
The Glass Ceiling is a proven and documented phenomenon for several countries. This paper tries to trace its existence of changing behaviour in the gender pay gap across the income distribution between the periods 1970 and 1990, and through a selection of professions for the highly educated individuals. This will show at the same time the transformation suffered by Swedish labor market between tho
