Multi-objective optimization of prefabricated slabs - A case study in parametric design
Typ
Examensarbete för masterexamen
Program
Publicerad
2021
Författare
Zayton, Gabriella
Karlsson, William
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
Starting in 2022, the Swedish government will introduce a new law, demanding cli mate declarations from developers of new buildings. Structural engineers have an
important role when it comes to deciding on a suitable design that satisfies demands
on climate impact, cost and efficacy. One may call this a multi-objective optimiza tion problem.
The purpose is to contribute to the reduction of the climate impact in the design
process. The aim is to present a method that can be used by structural engineers
to choose the optimal prefabricated element with respect to climate impact and el ement costs. The objective is to create an algorithm able to vary parameters and
produce a database with all possible solutions as output.
The investigation of this master thesis was divided into three different parts. The
first part included a literature study on material, slab elements, climate analysis and
optimization. After the literature study, the second part continued with generation
of database including FE analysis, LCA calculation and cost estimation. The third
part of this study consists of post-processing and presenting extracted results from
the database through creation of scatter plots, linear regression and Decision Tree
Models. The study presents a workflow possible of measuring optimality according to
the established definition. The inclusion of more design and behavioural constraints
will further improve the detail level of the study. The use of Decision Tree Models
was found advantageous and further testing could lead to trained algorithm capable
of predicting optimality of elements not originally part of the database.
Beskrivning
Ämne/nyckelord
Climate impact, Life Cycle Analysis, Slab design, Finite Element, , Full Factorial Design, Decision Tree Model.