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180 lines
5.6 KiB
Text
180 lines
5.6 KiB
Text
{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# General design guide",
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## The design process\n",
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"\n",
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"The design process is part of the life cycle of a structure: the ‘idea-phase’,
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the ‘design-phase’, the ‘construction phase’, the ‘use and maintenance phase’,
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and the ‘demolition phase’. The structural engineer acts in the ‘design phase’.
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The terms ‘initiative’, ‘project definition’, ‘concepts’, ‘preliminary design’,
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and ‘verification of structural safety’ will be explained shortly below.\\\n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Project definition\n",
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"\n",
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"To define the project, one first drafts
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a plan of action (strategy). This
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determines how to proceed in this
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phase, what the results should be and
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the criteria to which the result of this
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phase should be compared. Just like
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in the previous phase various aspectstudies
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need to be done. Eventually
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this leads to the formulation of a report
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containing all basic assumptions
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concerning the structural design. This
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forms a supplement to the PoR.\\\n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Concepts\n",
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"\n",
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"In this phase too several studies
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have to be performed. The designer
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makes several ‘structural’ concepts.
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To make a sensible design, he
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first analyses the force flow in both
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horizontal and vertical direction. Also
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the ability of the structure to retain
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its shape and place is investigated
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as well as the connections between
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different elements and parts of the
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building. After feedback from the
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structural assumptions at least two of
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the concepts are chosen for further
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analysis. With the aid of design tools
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(rules of thumb, diagrams and tables)
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the overall dimensions of the structure
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(including stability measures) are
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determined and critical connections
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are studied for feasibility. The
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sections on different materials contain
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information on structural elements
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(such as precast conrete beams,
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hollow core slabs etc.) and tables
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with available (steel) profiles to come
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to reasonable dimensions. Already
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in this stage it is wise to orientate on
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different foundation possibilities as the
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foundation can have influence on the
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rest of the structure. The section on
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foundations can provide the necessary
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information. Although the load bearing
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structure is designed, this phase is not
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yet finished. Finally the designer needs
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to look into possible façades and roof
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elements. Now a choice can be made
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between the different concepts based
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on a multi criteria analysis. The criteria
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are based on the PoR and structural
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assumptions.\\\n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Preliminairy structural design\n",
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"\n",
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"Now all the dimensions of the chosen
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structure can be determined. Again
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the sections on the different materials
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can be helpful. Make sure, also in
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this preliminairy design, that stability
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of your structure is ensured. It is a
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good idea to search for alternative
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possibilities for the foundation and
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connecting structure to prevent
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surprises in the final design stage. Also
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the building envelope deserves some
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attention. Use the different examples
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given in the later chapters.\\\n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Preliminary design\n",
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"\n",
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"In this phase a further analysis
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of the strength, behaviour of the
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structure is made. Also the stability
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is checked, and necessary stability
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measures are added. To do this, quick
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calculations are made with simplified
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load combinations. The section on
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mechanics offers the necessary
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formulas and ‘forget-me-nots’. More
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attention is given to the foundation
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of the structure. Calculate the total
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vertical load and design a transition
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structure (which transfers the loads
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from the main load bearing structure to
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the foundation). Also a further analysis
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is made of the possible façades, roof
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elements and other building finishes
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needs to be made. How are the
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building finishes connected to the load
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bearing structure?\\\n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Verification of the structural safety and servicability\n",
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"\n",
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"The final preliminairy design of
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which the final dimensions are now
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determined, has to be checked with a
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structural code. In Europe this is the
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Eurocode. The different sections on
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steel, timber, concrete and foundations
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contain the necessary information to
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perform the check.\\\n"
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]
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