Flexible formwork technologies – a state of the art review

Hawkins, Will; Herrmann, Michael; Ibell, Tim; Kromoser, Benjamin; Michaelski, Alexander; Orr, John; Pedreschi, Remo; Pronk, Arno; Schipper, H.R.; Shepherd, Paul; Veenendaal, Diederik; Wansdronk, René; West, Mark J.

doi:10.1002/suco.201600117

Cited by 93 publications

(42 citation statements)

References 52 publications

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“…With today's availability of high strength and low cost fabrics, fabric formwork has become a well studied area in architecture and structural engineering communities. For comprehensive surveys see [Hawkins et al 2016;Hurd 1995;Veenendaal and Block 2012;West 2016]. The focus within engineering and design has been on manufacturing methods for canonical structural elements such as slabs, beams, trusses, and columns.…”

Section: Related Workmentioning

confidence: 99%

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Computational design of fabric formwork

et al. 2019

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We present an inverse design tool for fabric formwork - a process where flat panels are sewn together to form a fabric container for casting a plaster sculpture. Compared to 3D printing techniques, the benefit of fabric formwork is its properties of low-cost and easy transport. The process of fabric formwork is akin to molding and casting but having a soft boundary. Deformation of the fabric container is governed by force equilibrium between the pressure forces from liquid fill and tension in the stretched fabric. The final result of fabrication depends on the shapes of the flat panels, the fabrication orientation and the placement of external supports. Our computational framework generates optimized flat panels and fabrication orientation with reference to a target shape, and determines effective locations for external supports. We demonstrate the function of this design tool on a variety of models with different shapes and topology. Physical fabrication is also demonstrated to validate our approach.

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Section: Related Workmentioning

confidence: 99%

“…4, Article 109. Publication date: July 2019. with limited degrees of freedom [Hawkins et al 2016]. Complex structures are typically achieved by experimental trial-and-error.…”

Section: Introductionmentioning

confidence: 99%

Computational design of fabric formwork

et al. 2019

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“…Renuka Hangarge et al presented a comparison of the conventional formwork, tunnel formwork and aluminum formwork systems . Hawkins et al presented the current state of the art in flexible formwork technology, highlighting practical uses, research challenges, and new opportunities . Yamanobe et al described the structural characteristics of a pier with a base cast using mortar‐jointed UFC formwork.…”

Section: Literature Reviewmentioning

confidence: 99%

Relation between slab thickness and dimensions of formwork

Hussien

2018

Structural Concrete

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In 2015, there was one of the awful incidents in civil engineering. That was the collapse of the formwork strength of the building inside the Qassim University, resulting in the death and injury a number of engineers and workers. This is just an example of the long-recorded history which tells us about a large number of different collapses of formwork, which resulted in the loss of many lives and equipment. Therefore, it is necessary to provide a new vision for the design of formwork using many different sectors to ensure access to the lowest possible cost, taking into account the safety aspect. This goal can be achieved by certifying the stability of the sectors when taking into account the effects of bending stresses, shear stresses, and deflection. Calibration was achieved using the beforehand published method in 2000. This method is used to ensure the results obtained for the slab thickness less than 15 cm then the results were extrapolated to include slabs with a larger thickness. The results of the present search come out into a set of indicating curves point to the required quantity of lumber for each sector. This strategy is much easier and straightforward to help in the design process rather than using conventional equations. K E Y W O R D Sconcrete, formwork, normal stress, optimum dimensions, slab thickness

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“…Rigid formworks require large amounts of material and manual labour, making them expensive and time consuming to build. Recently, flexible fabric formworks have been the subject of extensive research, since they have the potential to create complex geometries while significantly reducing material use [5,6].…”

Section: Introductionmentioning

confidence: 99%

A Cable-Net and Fabric Formwork System for the Construction of Concrete Shells: Design, Fabrication and Construction of a Full Scale Prototype

et al. 2019

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This paper describes the construction of a thin shell concrete roof with a novel cable-net and fabric formwork system [1, 2]. The construction of the shell was a proof-of-concept demonstration of the formwork system, showing that through appropriate cable-net component design and an on-site shape control system [3], concrete shells with complex doubly-curved geometry can be built efficiently and with minimal material waste. The formwork system works by installing a fabric shuttering on a cablenet structure, that is tensioned from stiff boundary beams supported by standard scaffolding props. Starting from the lower supports, the concrete was sprayed on the flexible formwork from two aerial platforms in a carefully planned sequence. The cable-net was designed to deflect into the designed shape of the shell structure under the self-weight of the wet concrete. The cable-net nodes were specifically designed to accommodate the required geometric degrees of freedom; to restrain the fabric shuttering and to fix the carbon-fibre reinforcement at the correct level in the concrete section. They

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Flexible formwork technologies – a state of the art review

Cited by 93 publications

References 52 publications

Computational design of fabric formwork

Computational design of fabric formwork

Relation between slab thickness and dimensions of formwork

A Cable-Net and Fabric Formwork System for the Construction of Concrete Shells: Design, Fabrication and Construction of a Full Scale Prototype

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