A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geometrical characterisation for structural robustness
Assessing a structure’s intrinsic level of robustness is a widespread problem in the field of structural engineering and has taken on even greater importance since the attacks of September 11, 2001. Although numerous robustness approaches can be found in the literature, there is still today no consensus on which threshold makes a given structure robust or not, nor on the way to calculate this threshold. Moreover, all the existing methods are based on a numerical assessment of the structure’s aptitude for robustness once its design has been fixed. This thesis is about the development of a new type of approach to structural robustness, working on geometrical considerations only. It allows the integration of some constitutive dimensions of structural robustness – such as the aptitude for force redistributions – at the earliest steps of the design process. Based on graphic statics and strut-and-tie modelling, the method develops a visual robustness indicator showing structural aptitude for force redistributions. When implemented into parametrical software such as Rhino and its graphic algorithm editor Grasshopper, the approach also turns into an interactive tool. This interactivity may help project authors to understand the impact of design decisions on the robustness performance sought for (in terms of aptitude for force redistributions). Combined with Maxwell’s theorem of load paths, the method also allows the comparison of the efficiency of various design options in terms of the volume of material required for their implementation. The principles of the proposed geometrical method are developed in this thesis for two-dimensional structures. These principles are then illustrated by the analysis of four case studies. Two concern arched structures, the first in pure compression, the second in compression and bending. Two sets of walls are then studied, the first made of an ideal material with identical compressive and tensile strengths, the second intended to prepare the analysis of reinforced concrete structures. ; (FSA - Sciences de l'ingénieur) -- UCL, 2019
Geometrical characterisation for structural robustness
Assessing a structure’s intrinsic level of robustness is a widespread problem in the field of structural engineering and has taken on even greater importance since the attacks of September 11, 2001. Although numerous robustness approaches can be found in the literature, there is still today no consensus on which threshold makes a given structure robust or not, nor on the way to calculate this threshold. Moreover, all the existing methods are based on a numerical assessment of the structure’s aptitude for robustness once its design has been fixed. This thesis is about the development of a new type of approach to structural robustness, working on geometrical considerations only. It allows the integration of some constitutive dimensions of structural robustness – such as the aptitude for force redistributions – at the earliest steps of the design process. Based on graphic statics and strut-and-tie modelling, the method develops a visual robustness indicator showing structural aptitude for force redistributions. When implemented into parametrical software such as Rhino and its graphic algorithm editor Grasshopper, the approach also turns into an interactive tool. This interactivity may help project authors to understand the impact of design decisions on the robustness performance sought for (in terms of aptitude for force redistributions). Combined with Maxwell’s theorem of load paths, the method also allows the comparison of the efficiency of various design options in terms of the volume of material required for their implementation. The principles of the proposed geometrical method are developed in this thesis for two-dimensional structures. These principles are then illustrated by the analysis of four case studies. Two concern arched structures, the first in pure compression, the second in compression and bending. Two sets of walls are then studied, the first made of an ideal material with identical compressive and tensile strengths, the second intended to prepare the analysis of reinforced concrete structures. ; (FSA - Sciences de l'ingénieur) -- UCL, 2019
Geometrical characterisation for structural robustness
Deschuyteneer, Aurélie (author) / UCL - SST/ILOC - Faculté d'Architecture, d'Ingénierie architecturale, d'Urbanisme / UCL - Faculté d'architecture, d'ingénierie architecturale, d'urbanisme (LOCI) / Zastavni, Denis / Cap, Jean-François / Fivet, Corentin / Muttoni, Aurelio / Remacle, Jean-François / Schwartz, Joseph / Vanderburgh, David
2019-01-01
Theses
Electronic Resource
English
DDC:
690
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