Det har blivit allt vanligare med direkthandel i stora enplansvaruhus, där kunder plockar sina varor direkt från pallställ. Dessa pallställ går ofta från golv till tak och är lastade med varor ända upp till taket. I taket förekommer ofta fackverksbalkar i stål som bär upp stomsystemet. Vid en eventuell brand i ett pallställ kan det bli stor lokal flampåverkan med snabb upphettning i delar av fackve

Below every building there is a different type of foundation work, it can comprise point carried piles or floating piles that pursues down the loads in the ground. A foundation work without piles could also be used, but big subsidence can arise in particular at bigger building constructions, it is however most important that the differentiate subsidence becomes too big. These subsidences can influ

Problem: How does collaboration between architects and engineers work? Which are the advantages and disadvantages in the collaboration? How can you make the cooperation better? Object: The purpose of this thesis is to make a connection between architect students and engineers, to find the differences between us and to try to collaborate. We wanted to know how difficult the cooperation could be, i

Glulam is almost exclusively the chosen material of timber frame structures. Of those, three-hinged (three-pin) portal frames are incomparably the most common type. Being both statically determinate and stable against horizontal forces in its own plane offer both practical (basic constructive details) and economical benefits. The design of the haunch allows for various solutions: it can be curved

A silo discharge with a bulk material consisting of iron ore pellets is studied. The silo is about 65 meters high and 38 meters wide. The quality of pellets decreases when they are exposed to high stresses while moving. The stresses are therefore not allowed to exceed a certain threshold. It must also be possible to trace the origin of a sample from the discharge. To fulfill these two demands the o

In this report the shear-capacity of adhesive glass-joints was investigated. A number of various adhesives were tested; glues and silicones. Tests were conducted with small specimens to evaluate the characteristics of the adhesives. With the results of the tests material models were evaluated in the finite element program Abaqus. Linear-elastic and hyper-elastic models were used. Large-scale tests

The polymer PTFE has become an important and widely used sealing material in the valve industry in recent years. It provides good strength and low friction, but it is sensitive to stress relaxation, i.e. loss of stiffness with time. This in turns may cause problems with leaking seals. The objective of this master’s dissertation is to perform a stress analysis of the PTFE sleeve used in an indust

Glulam arches can be used when designing structures with large spans such as halls or arenas. Wood has low density compared to steel and concrete which keeps down the dead weight of the structure. The cross section of glulam arches is often built up as a box-section for efficiency reasons. However, wood shows strongly orthotropic behavior where maximum allowed stress perpendicular to grain is only

Parallel computing is becoming more and more important in modern Finite Element Software. As problems grow larger, computation on a single processor may not be fast enough. To overcome this problem, one can utilize parallel programming using e.g SMP-machines or clusters. Furthermore, when local compute resources are scarce, it can be quite convenient to take advantage of non-local resources for pe

I dag finns ett flertal metoder för jordförstärkning i samband med grundläggning av vägar och hus. För förstärkning av kohesiva jordar är bland annat stenpelarmetoden användbar. Stenpelarförstärkning är en etablerad förstärkningsmetod i stora delar av världen. Metoden härstammar från Tyskland där vibrationsbaserad förstärkning utvecklades under 1930-talet. En stenpelare byggs upp genom att sten

In 1994 the Swedish Construction Code, BKR, was changed from being based on material to being based on function. This permitted constructing multi-storey buildings with a bearing framework made of wood, which had been prohibited since the end of the 19th century. There is now a growing in- terest of using wood as a construction material. In Växjö four seven-storey buildings, Limnologen, are under

Ökad industrialisering har inneburit stora effektivitetsvinster vid nybyggnation av flerbostadshus. Det finns dock ännu ingen metod för standardisering och industrialisering av grundläggningen, vilket gör den till en relativt kostsam och resurskrävande del av byggprocessen. Skanska har startat ett konceptbygge som kallas Moderna Hus. Syftet är att genom standardisering och industrialisering kapa

Following changes on a European level, there are plans to also in Sweden reduce the characteristic value of shear strength of glued-laminated timber. In Sweden, a decrease of approximately 30% from a characteristic value of 4.0 MPa (for glulam L40) to 2.5 or 3.0 MPa is planned. This would mean that wood would lose competitiveness against other construction materials such as steel and concrete. T

Today a dynamic analysis is often performed with the use of advanced finite element software. An advanced model normally produces precise results. Analyzing these large models of bridges is however time consuming and a detailed description of the geometry, supports and material properties must be known. In an early stage of a project a reduced model could significantly reduce the time needed to perf

This report is dealing with time dependent settlements calculated with numerical methods and subsequent comparisons with field measurements. The numerical computations in this report have been performed using Plaxis, a two-dimensional numerical program based on the finite element method. Plaxis is very practical for solving complex geotechnical problems involving settlements or slope stability.

The work presented in this thesis deals with investigation of methods to evaluate simultaneous moment and normal force capacity for symmetrical and unsymmetrical thin walled aluminium beams. The beams are supplied by Sapa Building System AB and is used in their glass facade system SFB 4150. The system is constructed in a way that makes it possible to make large glass facades. It is then of interes

Until recently, the general level of detail in full car crash models has not allowed a physical modeling of rubber bushings with solid elements. This is partly because of the difficulty in modeling the complex characteristic of rubber, but also due to limited understanding of the mechanical properties of rubber materials. The main focus of this Master’s thesis project is to develop a new and im

Foundations of buildings and structures are laid with various methods, both deep and shallow foundations. Piling is the most common method of deep foundations while spread footings are often used in shallow foundations, especially in buildings with column frame. An alternative is to use a composite pile foundation where piles and spread footings or piles and a base slab are used to carry the loads

Examensarbetet behandlar fenomenet momentreduktion. Reduktionen uppstår då en spontvägg deformeras och krafterna i jorden omfördelas. I arbetet har fyra olika spontdimensioneringsmetoder behandlats som på olika sätt leder till ett dimensionerande moment. Tre av dessa är handberäkningar och den fjärde är en jämförande beräkning som görs i finita elementprogrammet PLAXIS. Två av handberäkningsmetThe thesis deals with the phenomenon of moment reduction. The reduction occurs when a sheet pile wall deforms and forces of the soil are redistributed. Four different methods of designing sheet pile walls are treated that in different ways lead to a design moment. Three out of these design methods are made by hand calculations and the fourth is a comparative assessment carried out in the finite

The objective of this dissertation is to implement a large part of CALFEM functions to Python and to explore libraries and software in addition to NumPy needed to achieve a comparable environment for CALFEM. No actions will be taken to improve or change existing programming. Comparison of code and description of the main differences when writing in Python is done to simplify the transition for exis