Rapporten redovisar ett examensarbete vid avdelningen för Konstruktionsteknik vid Lunds Tekniska Högskola. Utgångspunkten är att studera möjligheterna att genomföra en beräkning av de utmattande påkänningarna i en slakarmerad betongkonstruktion med hjälp av finita element-metoden.

This report concems the use of interactive distance leaming to spread the knowled ge among employees. Research ofknowledge management, communication using the Internet and pedagogic has been done to get a good understanding of interactive distance leaming. After this awareness an investigation of the Swedish market was done to identify representative systems for interactive distance learning today

A method of calculation is developed for a new type of lightweight crossbar. To prove the validity of the method it is verified with practical experiments. Data for the material used for input in the method is experimentally determined in most cases. A discussion concerning important problems when developing a new building system is included in the report. (The report is written in Swedish.)

The purpose of this report is to analyse principles for calculations of deflections the serviceability state. Methods made in the following three codes have been considered: the Swedish BKR 99, the European Eurocode 2 and the American ACI Building Code and Requirements of Reinforced Concrete. Deflections for short term as weil as for long term loading have been investigated. The analyse has been p

The purpose of this thesis is to evaluate the influence of the length effect of Structural timber. With that aim two samples with different length have been tested. Each sample has one hundred beams with the properties of both samples as close as possible. Engineering design methods for timber assume homogeneous material all along the beam, but in reality the strength is highly variable along a ti

In certain types of glulam roof structures with large spans, reliable methods for design with respect to instability are lacking. One example is a three-hinged roof truss with steel tension rods as shown in Figure 1. The types of structures shown in Figure 1 are investigated in the diploma project with the purpose to evaluate and improve the currently used design methods and detailing. Calculation

The purpose of this master thesis is to investigate effects of warping and distortion in thin-walled box-girder bridges, see figure below. The master thesis deals with a number of different analytic methods, which are compared to finite element models. Transverse distortional bending moments and direct stresses, caused by torsional and distortional warping, is determined by analytic methods. Simpl

Detta arbete bygger på en studie av träs beteende vid belastning vinkelrätt fiberriktningen med och utan förstärkning i form av skruvar SFS WT-T-8,2xL. Uppdragsgivaren var Arne Emilsson på Limträteknik i Falun som önskade förstärka träet vinkelrätt fiberriktningen i kritiska punkter där laster tas ned. Träets uppförande vid belastning med och utan förstärkning har studerats genom en försöksserie o

The structural behaviour of a shear wall mainly depends on the configuration of the sheathing to framing joints, and the connections to the surrounding structure, of which the anchoring to the substrate is of major importance. However, most of the today used sh ear wall design methods are linear elastic models limited to the design of walls fully anchored at wall ends and openings. For the design

The purpose of this master thesis has been to study prestressed concrete in different bridge codes. The studied codes are the Swedish BRO 94, the American AASHTO code and Eurocode. The codes are compared by dimensioning of a bridge slab in transverse direction and the factors that decide the amount of prestressing steel are evaluated.

This Masters thesis examines the possibilities of using structural masonry in modern building with respect to statical load bearing capacity, building physics, building costs and acoustics. The examination is done by designing three buildings using an existing building as a model. These buildings are then compared to each other and to the existing building with respect to the areas of interest men

This report will examine the reliability of calculation methods used for concrete structures in the serviceability limit state. A comparison between the different methods will be done, based on calculations of the reliability index for these methods. This comparison will be the base for a discussion about what norm that should be prefferd in different situations and what level of reliability the c

This thesis is supposed to form the basis for a future productian of a two-storey wooden house called "Villa Nöbbele". The house is designed for construction on si te. An estimation of cost of "Villa Nöbbele" has been made and to get an object for comparison regarding the construction procedure, bu t above all regarding the price, a house of the Modulent collection has been stu

The objective of this study is to describe the main problem areas in the current stability design of multi-storey timber frame buildings, to identify lacks in current design principles and to recommend in which areas the future development of design principles and guidelines should be focused in order to facilitate the design work and make stabilising systems more effective.

This report contains a study of early deflections and crackingloads in precast prestressed hollow core slabs and the parameters affecting these. The objective of the report is, by conducting measurements of the modulus of elasticity and split-tension on the concrete, to compute the deflection and crackingloads for two types of hollow core slabs manufactured by the company Starka. The analysis is

A model for calculating crack widths in mesh reinforced shell structures with arbitrary directions of the reinforcement. The model is compiled into a spreadsheet for practical use. Comarative examples are made between new and traditional methods.

This report contains a study of thermal effects in concrete bridges. The purpose is to investigate the relevance of the temperature actions prescribed in the Swedish bridge standard, BRO 2002, for concrete bridges. The analyses are performed for a bridge cross-section model, exposed to climatic effects described by climate data for several Swedish locations. The program HEAT 2 was used to calculat

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