Toward holistic tension- or compression-biased structural designs using topology optimization

Smarslik, Mario; Ahrens, Alexander; Mark, Peter

doi:10.1016/j.engstruct.2019.109632

Cited by 26 publications

(17 citation statements)

References 49 publications

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“…Soll ein Tragwerk aus Beton entworfen werden, sind druckdominante Strukturen zu bevorzugen, für Stahl entsprechend zugdominante. Dies erfolgt durch die Steuerung der Sensitivitäten mithilfe eines neu eingeführten Wichtungsfaktors ψ . Dazu werden in jedem Iterationsschritt die Hauptnormalspannungen eines jeden Elements bestimmt.…”

Section: Topologieoptimierungunclassified

“… Spannungsgesteuerte Topologieoptimierung an einem Dreifeldträger unter Gleichlast: a) statisches System, b) neutral, c) zug‐ und d) druckdominant gesteuert Stress‐biased topology optimization of a three‐span beam under constant load: a) static system b) unbiased, c) tension‐ and d) compression‐biased material layouts …”

Section: Topologieoptimierungunclassified

“…Es würden sich lediglich dominante Druckstreben ausbilden. Hier bieten sich numerisch aufwendigere, multimateriell‐hybride Ansätze an, in denen Stab‐ und Kontinuumselemente miteinander überlagert werden .…”

Section: Innere Strukturfindungunclassified

“…Kraftflussaffin entworfen, lassen sich sowohl Bauteilmassen [9][10][11][12][13][14][15][16] als auch Bewehrungsmengen [17][18][19][20][21] signifikant reduzieren, was sich positiv auf den Ressourcenverbrauch sowie die material-und transportinduzierten Treibhausgasemissionen auswirkt. Im Wesentlichen kann dabei zwischen der Optimierung der äußeren Form [22][23][24][25][26][27], also der globalen Strukturfindung, und der inneren Strukturfindung, also der Verteilung von Material oder Bewehrungsführung im Inneren eines Bauteils [28][29][30], unterschieden werden.…”

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Optimierungsgestützt entwerfen und bemessen

2020

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Optimization-based design Concrete is freely formable. And reinforcements can be placed anywhere in the concrete. Nevertheless, this potential is rarely used. Reinforced concrete structures are commonly rectangular shaped with reinforcement meshes parallel to the surfaces and thus possess large mass. This article shows how topological optimization can be used to create concrete structures affine to the flux of forces. Material consumption decreases rapidly. External shaping, effective cross-section designs, and trajectory-oriented reinforcement layouts are presented. First the very basic equations of the associated structural optimization problem are derived. Then a novel material-specific control mechanism towards tensile or compressive dominant designs is introduced. It is discussed how this enables to account for structural robustness. Numerous examples illustrate application on bridges, pylons, shells, beams, girder grids or support details and quantify the potential material reduction in concrete construction arising thereof.

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Section: Topologieoptimierungunclassified

Section: Innere Strukturfindungunclassified

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Optimierungsgestützt entwerfen und bemessen

2020

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“…Topology optimization is a powerful computational tool to improve material distributions within a given design domain, usually following a maximization of structural stiffness under the restriction of a limited material volume . For the examples presented herein, an approach combining truss and continuum optimization with an embedded truss formulation is chosen .…”

Section: Topology Optimization Based Designmentioning

confidence: 99%

Hybrid reinforcement design of longitudinal joints for segmental concrete linings

Smarslik

Mark

2019

Structural Concrete

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In mechanized tunneling, the performance of segmental tunnel lining segments is closely bound to the longitudinal joint design. The guiding local effect is partial area strip loading with predominantly plane load distribution. Current normative standards only inadequately cover this case, which leads to an underestimation of the actual bearing capacities and thus offers considerable optimization potential. A hybrid material concept is proposed to improve the joints' performance, which is based on the results of robust combined trusscontinuum topology optimization. It combines high‐performance steel fiber reinforced concrete in the area of load application with conventional materials used for the remaining regions. A relocation of the gasket to the segments' center proves to provide better protection, and a double hinge neck leads to a more efficient load transfer. The effects of these measures on the structural performance are analyzed experimentally and compared against conventional designs. The results show pronounced increases in bearing capacities by using hybrid reinforcements and provide a quantification of optimization based design modifications.

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Identification of Structures

2022

Optimization Aided Design

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Toward holistic tension- or compression-biased structural designs using topology optimization

Cited by 26 publications

References 49 publications

Optimierungsgestützt entwerfen und bemessen

Optimierungsgestützt entwerfen und bemessen

Hybrid reinforcement design of longitudinal joints for segmental concrete linings

Identification of Structures

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