The aim of this study was to investigate if it is possible to dry concrete samples in a microwave aven without damaging the concrete. This method could, if it is possible, fadilitate the work in many laboratories today. In the beginning of the work a theoretical study over the behavior of the microwaves is done. Same different areas in the construction business where it is possible to use microwav

This paper deals with cracking in industrial concrete floars. We have restricted us to study two special cases, that is, eraeks developed by the load itself and eraeks due to shrinkage. We have of course also studied the deformation effects of the load. The effect of the load has here been studied thoroughly by two separate methods, Winklerfoundation and the more exact Elastic halfspace theory. We

The present work deals with wooden laminated beams and arehes joined with nail plates. Analysis methods for shorthand as well as computer calculations are presented. A number of practical experiments have been performed as a validity check of the theory. The economy for this type of construction compared with glued laminated timber is discussed.

Silo-Lätt är ett PC-baserat datorprogram som beräknar snittstorheter som förskjutning, moment, tvärkraft, ringkraft m m för en cirkulärcylindrisk rotationssymmetrisk betongsilo. Rapporten inleds med allmänna resonemang om programmets användningsområde och begränsningar. Därefter redovisas den teoretiska bakgrunden till problemet och programmets uppbyggnad. Rapporten avslutas med en detaljerad inst

This report presents a study of the use of a fibrecomposite as an alternative to steel in reinforced concrete structures. Corrosion is a big problem for the building trade and this might be a possible way of solving it. The new material, glassfibre reinforced esterplastic, is non-corrosive, lightweight and has a high tensile strengh. In laboratory tests the tensile strengh was determined and after

This essay describes computer programs for simulation of mechano-sorptive effects in wooden materials, i.e. the interaction between moisture changes and mechanical leading. Further on, three exaroples of deformation in wooden structures due to moisture variations are presented.

Efter försök och'beräkningar på kapade Siporexbalkar har vi kommit fram till att de kapade balkarna kan användas i färdiga konstruktioner. Den bästa bärförmågan får man i balkar med påsvetsade vertikala ändförankringar, man undviker på så sätt de vidhäftningsbrott som är den avgörande brottsorsaken i balkar utan ändförankringar. Balken med förankringar kan användas till sin fulla märklast, doc

Syftet med detta examensarbete var att först kortfattat beskriva uppkomsten av egenspänningar i massiva betongkonstruktioner. Dessa spänningar är orsakade av bl a tvång, temperaturhöjningar samt efterföljande temperaturminskningar. Den huvudsakliga uppgiften var att beskriva en teoretisk modell för att beräkna spänningar i ung betong. Denna modell bygger på Hooke's lag, dvs ett linjärt samband

This paper deals with 3-pinned frames of laminated veneer lumber. The fixed knees are made of plywood- or steelgussets. The design proeecture in accordance with the Swedish building code, "Nybyggnadsregler" is described. A number of practical experiments have been performed to check the stiffness and strength off the knee. The economy for this type of construction campared with glued lam

Uppsatsen beskriver limförbands beteende i icke bärande väggar uppbyggda av gipsskivor som limmas på stålreglar.

We have searched for different possibilities to introduce Multimedia at a welding company in Argentina. We decided to create a training system. Our system should teach an unskilled user how to use a rather camplex expert system for welding. In this paper we discuss the design and implementation of a multimedia training system. We also include an evaluatlon of the software tools used in this projec