Filtyp
Using an inclined screw brings many advantages compared to traditional methods, e.g. high load-bearing capacity, fast and easy montage and high fire resistance. This report contains a study of the influence end- and edge distances have on the load-carrying capacity in joints with inclined screws. Tests were carried out in order to determine if a few of the end- and edge distances proposed by Kevar
This report contains a theoretical study concerning composite construct design with steel and concrete and its mechanical and thermal interaction. The two primary advantages with this composition are the increase of the load-carrying capacity and its fire resistance. Composite construct elements are often used in the building process and there are several companies that offer a complete framework
Calculated deformations in glulam beams caused by moisture are based on linear moisture profile, this does not reflect reality. This report contains of a study where the moisture induced deformations are measured in three different test setups, simulating more realistic moisture exposure. After the beams are seasoned in RH 30 and 95 % the climate was changed, one group was in a moistening phase an
Today´s society depend on electric energy, in nuclear power plants this can be produced. Each nuclear reactor is situated inside a concrete containment reinforced with a post-tensioning system. The aim of this report is to analyse the state of the post-tensioning systems at Ringhals nuclear power plant. The purpose of a containment is to protect the outside world if an accident should occur. Tight
The purpose of this research was to determine how much the strength reduces in a slant nailed connection, which was examined for horizontal loads between stud and bottom plate in an infill wall. Slant nailing is commonly used in the workplace and is an alternative to metal plate connectors as they are both more expensive and more time consuming. However, there are no Swedish or European standards
This paper presents two methods of shear capacity design in two-dimensional membrane elements. The aim in this thesis is to find a method who calculates one resulting transeverse reinforcement instead of two. A procedure (Unified Shear Theory by Collins and Mitchells) is presented for design of transverse reinforcement in two-way concrete slabs. This procedure is compared to the Swedish procedure
Today, the knowledge about ice forces in Sweden is uncertain. Certain guidelines have been developed according to RIDAS to determine ice forces when constructing dams, piers etc. In this thesis an environmental model has been developed to predict thermal ice pressures. The inputs for the model are; a) the mean daily air temperature for each day of the year; b) the snow cover depth. The mean daily
Modulenthus is a company in the wood house industry that builds houses in volumes. Volume building means that Modulenthus builds predecorated house volumes in a factory and transports these to the building sites where they are being put together to complete detached houses. The purpose of these Master Thesis is that, on the basis of Modulenthus conditions and wishes, evaluate a possible using of a
The aim in this thesis is to itemize materials with ADT. The material’s lists shall then be transferred from ADT to Access and furthermore to Jeeves. The aim also is to describe the PDM-system and to find out if this PDM-system can cooperate between ADT and Jeeves. I also tried to study the possibility of transferring the material’s lists from ADT to the PDMsystem. I found that the material’s list
Vid nybyggnation av betongkonstruktioner ställs höga krav på livslängd och kvalitet. En starkt bidragande faktor till ökad livslängd för etongkonstruktioner är täckskiktets tjocklek. Ett stort täckskikt skyddar armeringen då det hindrar att karbonatiseringen når in till armeringen. Användandet av större täckskikt resulterar dock i svårigheter att klara dagens krav på maximalt tillåtna sprickvidder
Danogips has introduced tongued and grooved gypsum boards which can be used regardless of the distance between the studs in the framework. The goal of this thesis is to evaluate the material properties of the new gypsum product and compare it to conventional gypsum walls. Literature studies and three different experiments are carried out. The stiffness of the construction is measured by applying a
Fastighetsbeståndet byggt mellan 1940-70, med tegelfasader av skalmurstyp, har omfattande skador på grund av rostande armering och kramlor. Anledningen är att de stålsorter som användes för armering och infästning inte var korrosionsbeständiga fram till 1980-talet. Initialt uppträder problemen över öppningar där armering finns i det understa tegelskiftet. Då täckskiktet är otillräckligt börjar stå
Peab har utvecklat vägbyggnadskonceptet SwePave för att optimera olika överbyggnadskonstruktioner med bland annat stabiliserat packat material. Denna metod går även att använda för att stabilisera jorden förgrundläggning av nya byggnader. Där stabiliserat material använts för att förstärka jorden behövs även en metod för att förstärka för de punktlaster som nedförs av stomkonstruktioner. För att f
A progressive collapse implies a structural failure initiated by a local damage which subsequently develops, as a chain reaction, into a failure of either the entire structural system, or only a part of it. The collapse of the Ronan Point building in London 1968 prompted numerous efforts to develop structural design criteria to prevent progressive collapse. Improved design procedures with the inte
There are many ways to construct a building. The designing team, structural engineers and architects, works together to find the best possible solution that will fulfill the owner’s whishes. In this process a structural system needs to be chosen. There are many factors that affect the selection of the structural system, but generally the most economical system is chosen. The factors that need to
In the 1940-ies curtain walls were introduced, i.e. brick walls that do not have any bearing function but served as a front material. Horizontal reinforcement was used in this kind of walls, partly over and under openings or, in undisturbed wall fields, every 5-6th bed joint. In this work the tensile bond strength of mortar joints repaired with an injection tool and a manual method respectively is
In this master’s thesis automatic generation of reinforcement distribution in the structural engineering program FEM-Design Plate was investigated. The reinforcement distribution proposed was to be as accurate as possible, both from a theoretical and a practical point of view. For this purpose, calculation routines considering current national codes and engineering practice have been developed. Th
In this master thesis, the properties of shell bedded autoclaved aerated concrete (AAC) are investigated. There are reasons to believe that the values for flexural, compressive and shear strength in the Swedish regulations are on the low side. The work within this master thesis consists of determining the characteristic values based on experimental tests. The test results indicate that the values
Modulenthus bygger småhus enligt principen volymhus, det vill säga att så mycket som möjligt färdigställs på fabrik så att huset kan levereras direkt till byggplatsen som ett antal volymer med golv, väggar och tak. Husen ställs på en krypgrund, en typ av grund som alltid blivit kraftigt ifrågasatt och på senare år uppmärksammad i media på grund av den stora andelen fuktskadade grunder. För att lig
Modulenthus bygger sina hus enligt volymprincipen, vilket innebär att de olika elementen till stommen byggs på olika linjer inne i en husfabrik. Dessa element sammanfogas sedan till större volymer. När volymerna står färdiga kan fönster och dörrar börja monteras och det invändiga arbetet såsom kakling av badrum och iordningställande av kök påbörjas. De inplastade volymerna transporteras sedan ut t
