Adaptive Systems to Reduce the Material Cost of Structures
(2022) In TVSM-5000 VSMM01 20221Structural Mechanics
Department of Construction Sciences
- Abstract
- Adaptive structures adapt to the changing circumstances in their environment using sensors and actuators, they may for example change their shape to be optimised for a specific load case when that load case is present. The building industry need to reduce its climate impact, low-carbon solutions are in demand. Structures must be designed so that the design load does not cause failure, due to stresses exceeding the ultimate limit. They must also be designed so that the deflections in the serviceability limit state do not cause problems. To fulfil the requirements, a sufficient cross-section is normally chosen. Many structures are rarely exposed to the loads they are designed for, meaning the capacity is much larger than required for the... (More)
- Adaptive structures adapt to the changing circumstances in their environment using sensors and actuators, they may for example change their shape to be optimised for a specific load case when that load case is present. The building industry need to reduce its climate impact, low-carbon solutions are in demand. Structures must be designed so that the design load does not cause failure, due to stresses exceeding the ultimate limit. They must also be designed so that the deflections in the serviceability limit state do not cause problems. To fulfil the requirements, a sufficient cross-section is normally chosen. Many structures are rarely exposed to the loads they are designed for, meaning the capacity is much larger than required for the vast majority of their life cycle. The material used causes emissions, the more material that is used, the larger the emissions. This thesis explores the opportunity to reduce the material cost of two-dimensional trusses by equipping them with an adaptive function. If the emissions caused by producing the energy required to activate the adaptive function, at the times large loads occur, is lower than the emissions of the material needed to fulfil the requirements without the function, emissions have been reduced. A program is created, capable of parametrically designing trusses to fulfil the serviceability limit state requirements of deflection by adaptively increasing the lengths of the struts. An analysis is performed with the program to compare alternative designs of adaptive trusses in different circumstances. The models generated in the analysis suggest that there is potential to reduce the amount of material with adaptivity. Adaptive trusses are compared to their non-adaptive counterparts, the material savings achieved range from 28 % to 89 %. (Less)
- Popular Abstract
- Adaptively adjusting the shape of structures may reduce the amount of material required to build them by up to 89 %. Nature teaches us that adaptors survive. Buildings are built with a constant capacity to withstand forces from all directions that vary in volume throughout a long life in service. When you lift something heavy, you flex your muscles, consuming energy to do so. You wouldn’t flex your muscles when you’re not lifting, right? That is what we ask of our buildings. Would it be possible to design buildings with the ability to flex their muscles when it’s needed, and rest when it’s not?
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9095016
- author
- Lundin, Erik LU
- supervisor
- organization
- alternative title
- Adaptiva system för att minska materialkostnaden av konstruktioner
- course
- VSMM01 20221
- year
- 2022
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Adaptive, structure, material economy.
- publication/series
- TVSM-5000
- report number
- TVSM-5261
- ISSN
- 0281-6679
- language
- English
- id
- 9095016
- alternative location
- https://www.byggmek.lth.se/english/publications/tvsm-5000-present-2014/
- date added to LUP
- 2022-07-26 09:36:11
- date last changed
- 2022-07-26 09:36:11
@misc{9095016,
abstract = {{Adaptive structures adapt to the changing circumstances in their environment using sensors and actuators, they may for example change their shape to be optimised for a specific load case when that load case is present. The building industry need to reduce its climate impact, low-carbon solutions are in demand. Structures must be designed so that the design load does not cause failure, due to stresses exceeding the ultimate limit. They must also be designed so that the deflections in the serviceability limit state do not cause problems. To fulfil the requirements, a sufficient cross-section is normally chosen. Many structures are rarely exposed to the loads they are designed for, meaning the capacity is much larger than required for the vast majority of their life cycle. The material used causes emissions, the more material that is used, the larger the emissions. This thesis explores the opportunity to reduce the material cost of two-dimensional trusses by equipping them with an adaptive function. If the emissions caused by producing the energy required to activate the adaptive function, at the times large loads occur, is lower than the emissions of the material needed to fulfil the requirements without the function, emissions have been reduced. A program is created, capable of parametrically designing trusses to fulfil the serviceability limit state requirements of deflection by adaptively increasing the lengths of the struts. An analysis is performed with the program to compare alternative designs of adaptive trusses in different circumstances. The models generated in the analysis suggest that there is potential to reduce the amount of material with adaptivity. Adaptive trusses are compared to their non-adaptive counterparts, the material savings achieved range from 28 % to 89 %.}},
author = {{Lundin, Erik}},
issn = {{0281-6679}},
language = {{eng}},
note = {{Student Paper}},
series = {{TVSM-5000}},
title = {{Adaptive Systems to Reduce the Material Cost of Structures}},
year = {{2022}},
}