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Långtidsegenskaper och beständighet hos limfogar mellan reglar och gipsskivor.

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

Ett träregelsystem med möjligheter.

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

Långtidseffekter i träbaserade skivmaterial.

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

Genomstansning av betongplattor: en jämförelse av några europeiska normer.

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.

Glasfiberkomposit som spännarmering i slipers.

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.

Aramid Fiber Rods as Reinforcement in Concrete.

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

Utmattning av armerade balkar i högpresterande betong : en jämförelse med vanlig betong.

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

Gränssnittsprogrammet ELVAR : Gränssnitt mot CAD-komponenter på NICK-format och Autocad.

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

GraphCase : grafiska erfarenhetsdata för val av bärande system.

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

Brandsäkerhet i flervånings bostadshus med trästomme: utformning av en REI 90 vägg.

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 )

Deformationer hos trä under tryck vinkelrätt fiberriktningen i kombination med fuktvariationer.

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

Utveckling av system för hantering av fastighetsinformation.

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

Design of Industrial Floors: Principles for Control of Warping.

The Slab-on-grade, which include Industrial floors, can be defined, according to ACI Committee 360,1 as a slab continuously supported by ground with an area of more than twice the area required to support the imposed loads. The slab may be plain or reinforced and may include stiffening elements such as ribs and hidden beams. The reinforcement may be provided for structural purpose or for the contr

Fuktrörelser och deformationer i stomsystem av trä.

This essay is a part of an extensive research project concerning multi-storey timber framed constructions in Sweden, initiated by Södra T im ber and the Department of Structural Engineering at Lund Institute ofTeclmology. The major part ofthe report is dealing with deformations in timber frames due to load and varying moisture content from an experimental point of view. It also includes a field-st