Longterm tests of two different adhesives have been performed. Three different test methods were used to determine the ageing performance of adhesive bands. One set of specimens was subjected to eyelic accelerated ageing and testedfor shear strength after different numbers of cycles. Another set has been exposed to the same ageing procedure, but with eonstantshear stress to determine creep deforma

A wooden frame system for non-bearing interior walls has been developed. The wall consists of studs, spaced at a regular interval of 900 mm, forming a frame together with the bottom and top p1ate. The framework is sheathed with gypsum plasterboards. The system is developed and adjusted for the purpose of fixing the gypsum plasterboards with glue. A special investigation of the mechanical behaviour

Board, made of wood based raw material, is used for structural purposes with increasing frequency in light construction techniques. Therefore, it is of great importance that both producers and users understand how the material behaves under longterm leading and elirnatic exposure. A comparative study is made of longterm load indurced detleetians of various board materials, such as fibre board, par

Denna uppsats behandlar genomstansningsbrott hos betongplattor och bygger till största delen på litteraturstudier. Den centrala delen av uppsatsen är en järnförande studie av sju europeiska byggnormer, däribland den svenska. Uppsatsen beskriver dokumenterade forskningsresultat och de brotteorier som dessa lett fram till. Vidare beskrivs de modeller som ligger till grund för de studerade normerna.

Use of glassfibercomposites as prestressed reinforcement in concrete railroad sleepers subjected to fatigue loading has been studied. Mechanical material parameters for a certain glassfibercomposite has been determined. Transferlength and anchorage problems have been analysed.

Examensarbetet innehåller en studie av bärande träregelväggar. Bärförmågan har optimerats för en given belastning. Väggen belastas med vertikala punktlaster, från takstolarna, i sin överkant.

The u se of fiber compos i tes in concrete structures is an alternative to conventional steel remforcement and several structures employing fiber composites have already been built in Japan, Europe and USA. Fiber composites offer high strength, high durability and low weight. Another property is high elastic elongation which is an advantage in structures acting under impact load. Part I of this re

The dynamic and static E-modulus of the concrete at very early ages (a few hours after casting) has been determined and the results has been compared. The dynamic modulus has been determined for 40x40x160 mm specimens with the resonance frequency method and the static E-modulus has been determined for cylinder specimens 0 l 00x200 mm with the stress strain method.

The report presents testresults from a research project conceming fatigue of reinforced normal and high strength concrete beams (0.3 x 0.4 x 6.0 m). The beams were designed to have the san1e flexural and shear capacity at a point 1.5 m from the support. Two beams of each sort were tested statically to failure, and four beams of each sort were tested with a fatigue load. The fatigue load varied bet

Arbetet har omfattat ett studium av hur Cad-komponenter på NICK-format lätt skall kunna hanteras och sändas till ett Cad-system (Autocad). Första delen av rapporten är en beskrivning av NICK-formatet. Sedan följer beskrivning av Cad-komponentfilema och rekommendationer för dessa. ·Kapitel 5 handlar om tillgängliga elektroniska varuinformationssystem och innehåller en kort beskrivning av dessa. I s

The project has airned to formulate and develop a graphical experience base, the GraphCase system. The system helps the user in capturing, storing and retrieving information about building structures. Results from student work in a yearly design course were used in the Master Thesis work. Drawings were seanned and project data were input to the hypertext based system. The search routines were desi

Abstract: The report shows a possible way to determine a REI 90 wall. This is done by studies of fire safety theories, the u se of four different calculation methods, small scale tests of different wall types and finallya full scale ISO 834 test of a 3x3 metre large wall. suggestions of so me fairly possible REI 90 walls are al so included. ( Swedish )

As multi-storey buildings with wooden framework are being build, constructors are faced with problems like, for instance, deformation of the wood, that is barely noticeable in a smaller house, but significant in larger buildings. Largest deformations of the wood occur w hen wood with a high original moisture content is loaded perpendicular to the grain and simultaneous allo w ed to dry, for instan

This work is a Master' s Thesis in Civil Engineering. It has been performed in ca-operation between BODAB and the Depmtment of Civil Engineering at Lund Institute of Technology. The aim of my work has been to develop a computer based system for reaJ-estate information management that mainly utilises the drawings and documents produced during the design. The system developed uses drawings produ