Jämförelse av livscykelkostnad för värmeproduktionssystem i flerbostadshusområde
Today more effective computer programs are in use, regarding design of geotechnicalconstructions. There is a risk that the theoretical background of the computerprograms, its limitations and the signification of the choice of soil parameter isforgotten when the computer programs become more user-friendly.This Master thesis deals with simulation and analysis regarding three computerprograms, FEM-design, with the addition Raft, Plaxis and BE-slab. Comparisons aremade for settlement and maximum moment in a concrete-plate. FEM-design is a threedimensional FEM-program, foremost created for design engineers. Plaxis is a twodimensional FEM-program, intended for geotechnical engineers while BE-Slab is aBoundary elements program in two dimensions that is mainly used by designengineers. Apart from the theoretical computer programs? models of calculation, somematerial models and their soil parameter are discussed in this Master thesis.The area treated in this Masters thesis is located in Älvsborgs harbor in Gothenburg.The bed sequence of the soil contains of fill with underlying clay, moraine andbedrock. Four cases of calculations regarding the bed sequence of the soil are beingused when simulating. These cases prove the significance of the soil thickness and thethoroughness of soil parameter determination. This Master thesis discusses how thesoil parameters for fill and clay are being obtained and which characteristics give thegreatest effects on the settlement and maximum moment.Since the soil parameters of the fill often are inhomogeneous with a large variationover a small area, they are the hardest to estimate. For clay, on the other hand, theinvestigation methods and possibilities to determine the material characteristics aregood. Variations in the clay parameters give a big effect on the resulting settlementand maximum moment. The fill, on the other hand, has a much lesser effect on thesettlement and the maximum moment. Beside the soil parameters, it is foremost thetheoretical computer programs? models of calculation that effect the resultingsettlement and maximum moment. There is a relatively big difference between thethree computer programs, which can be due to the models of calculation. Because ofthat it is very important to be aware of the theoretical computer programs? models ofcalculation, and if the computer program see the concrete plate as a part of a biggerplate or not.