Ina Cheibas

Last Name

Cheibas

First Name

Ina

ORCID

0000-0002-1109-9101

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Publications 1 - 6 of 6

Additive Manufactured Facade
Cheibas, Ina (2023)
Additive manufacturing is a rising trend in the construction field. It enables tailored facade designs that can incorporate environmental features like daylight, shading, ventilation, structural strength, and thermal conductivity. This potential enhances facade sustainability and energy efficiency attributes, achievable through recyclable mono-material components and integrated performances. However, the definitive demonstration of integrating environmental and fabrication parameters into computational facade design remains unrealized. This gap persists due to complex challenges in fabricating intricate building envelopes, necessitating consideration of numerous fabrication and environmental parameters, from accurate geometries, and good material properties to shading, daylight, air permeability, water tightness, and structural integrity. This research focuses on additive manufactured facade design strategies informed by both fabrication techniques and environmental considerations. The thesis provides fundamental design guidelines to support the fabrication of downcycled and multi-performative facade elements for light distribution and transmission, air permeability, water tightness, resistance to wind loads, and impact strength. The study employs both analytical and empirical methods to address three key criteria: (1) Design, (2) Material and fabrication, and (3) Environmental performance evaluation. The design process and guidelines (1) are thoroughly explored, encompassing the integration of fabrication and multiple environmental performances into a single mono-material element. Subsequently, material and fabrication methods (2) are analyzed through experimental testing at an architectural scale, utilizing a robotic arm and thermoplastic polymer material extrusion. Finally, performance evaluation (3) serves as the results validation of several large-scale prototypes. This approach opens up new possibilities for creating environmentally responsible architectural facades that push the boundaries of sustainable design.
Light Distribution in 3D-Printed Thermoplastics
Cheibas, Ina; Piccioni, Valeria; Lloret-Fritschi, Ena; et al. (2023)
3D Printing and Additive Manufacturing
Daylight distribution is an essential performance parameter for building facades that aim to maximize user comfort while maintaining energy efficiency. This study investigates the feasibility of using 3D-printed thermoplastic to improve daylight distribution and transmission. To identify how geometry influences light distribution and transmission, 12 samples with various patterns were robotically fabricated. In a physical simulation of spring, summer, and winter, a robotic arm was used to direct light onto the samples in both the vertical and horizontal print pattern directions. In addition, three samples of conventional facade materials, including a polycarbonate panel, a polycarbonate sheet, and a single sheet of glass, were compared with the 3D-printed samples. All samples were examined and compared using high dynamic range imaging to qualitatively characterize luminance. The data analysis demonstrated that 3D-printed geometry can successfully generate customizable diffusive light distribution based on the needs of the user. Furthermore, the results showed that the vertical pattern direction had higher light transmission values than the horizontal pattern direction.
Emerging building technologies and their impact on facade design
Cheibas, Ina; Lloret-Fritschi, Ena; Rachele, Cara; et al. (2024)
Construction Matters
This study examines historical construction methods in which emerging innovative materials and building techniques have influenced the facade design. It investigated three case studies of iconic facades, through their contextual background, key design theories, and influential models that have contributed to advancements in building design. Across a century, the Prudential Building, envisioned by Louis Sullivan in 1896, the 860–880 Lake Shore Drive Apartments, designed by Mies van der Rohe in 1949, and the Lloyd’s Building, crafted by Mike Davies in 1986, emerged as pivotal players in propelling the advancement of facade construction methods. Analytical-description techniques derived from historiographic and theory based research served as the methodology for analyzing these case studies. The results pinpointed influential guidelines that pave the way for future trends, including concepts like anatomical transparency, structural clarity, and performative design. These trends have become feasible due to the introduction of novel materials and innovative building techniques. The analysis conducted in this study facilitates a better grasp of the key elements that shape facade construction, particularly in the context of emerging technologies.
Printing thermal performance: an experimental exploration of 3DP polymers for facade applications
Piccioni, Valeria; Leschok, Matthias; Lydon, Gearóid; et al. (2023)
IOP Conference Series: Earth and Environmental Science ~ SBE23-Thessaloniki "Sustainable built environments: Paving the way for achieving the targets of 2030 and beyond"
The decarbonisation of the building sector requires the development of building components that provide energy efficiency while producing minimal environmental impact. We investigate the potential of polymer 3D printing (3DP) for the fabrication of mono-material translucent facade components, whose properties can be tailored according to climatic conditions and functional requirements. These components bear the potential to reduce energy consumption in buildings and, at the same time, can be fabricated with minimal environmental impact thanks to the recyclability of the feedstock material. In this study, we explore the effect of component geometry on the thermal insulation properties of 3DP objects with bespoke internal structures. Different prototypes are fabricated using a robotic polymer extruder, and their thermal properties are measured following a hot-box test method. The experimental results are then used to calibrate a heat transfer simulation model describing the joint effects of conduction, natural convection and infrared radiation through the components. We show that it is possible to fabricate insulating polymer components providing thermal transmittance ranging from 1.7 to 1 W/m2 K only by changing the internal cavity distribution and size. This proves the possibility of designing 3DP thermally-insulating components for different climatic conditions and requirements. This study provides the first insights into the thermal behaviour of polymer 3DP facades on a large scale. The results suggest that this innovative manufacturing technique is promising for application in facades and encourages further research toward performant and low-embodied energy 3DP building components.
PneuPrint: 3D printing on inflatables
Lin, Che Wei; Mattei, Gabriele; Cheibas, Ina; et al. (2023)
Architecture, Structures and Construction
This research investigated the feasibility of thermoplastic 3D printing on inflatable membranes. Five experiments were performed in an iterative process through design and manufacture (1), computational simulation and 3D scanning (2), and robotic fabrication on the pneumatic formwork (3). These experiments ranged from small to large-scale 3D printing. Experiment 1 demonstrated the small-scale feasibility of the process and the need to integrate an air-pressure control loop. Experiment 2 investigated the technique transfer from small to large-scale. Experiment 3 analyzed the deviation and shape accuracy of the inflatable membrane. Experiment 4 identified the required fabrication settings and compatibility between the membrane and the 3D printing material. Finally, Experiment 5 demonstrated the design and fabrication potential of large-scale 3D printed elements on pneumatic formworks. The results proved high potential for building freeform design elements for architectural applications on pneumatic formworks.
3D printing of a multi-performative building envelope: Assessment of air permeability, water tightness, wind loads, and impact resistance
Cheibas, Ina; Perez Gamote, Ringo; Lloret-Fritschi, Ena; et al. (2024)
Journal of Building Engineering
This study investigated the 3D printing feasibility of mono-material facade panels with recycled thermoplastic. The design had integrated performance parameters, namely air permeability, water tightness, resistance to wind loads, and impact resistance, and fabrication parameters in a computational iterative process to inform the geometry topology. The fabrication parameters were integrated and evaluated for geometry accuracy, print path accuracy of 5 mm length, overhang higher than 45°, inner layer adhesion, and adhesion to the print bed. Two panels, measuring 1.6-m length and 2-m height, and six connections were fabricated and evaluated in a standardized facade testing rig. The air permeability displayed a larger than 1.5 m3/m2·h permissible Class 1 value due to air gaps in the manufactured panels. The same gaps that occurred during the fabrication process permitted water flow in both panels after 7 min of testing. The panels passed standardized serviceability and safety standards for wind load resistance and achieved a maximum E5 class for impact resistance. The structural strength values were 1500 Pa for serviceability, 2250 Pa for safety load, and 3262 Pa for breaking load. These findings demonstrated that 3D-printed geometries have a high potential to facilitate sustainable design strategies by integrating multiple performances within a mono-material building envelope.

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Ina Cheibas

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