Curved Expandable Space Grids

Escrig, F.; Pérez-Valcárcel, Juan

doi:10.4203/ccp.7.18.1

Cited by 19 publications

(13 citation statements)

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“…These have the ability to expand in both a horizontal and a vertical direction [19][20][21]. While such structural elements need additional stabilizing members like cables or other locking devices, self-stable structures can be achieved with the application of special geometrical configurations through additional inner scissor-like elements.…”

Section: Introductionmentioning

confidence: 99%

Design, motion planning and control of a reconfigurable hybrid structure

Phocas

Christoforou

Matheou

2015

Engineering Structures

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Section: Introductionmentioning

confidence: 99%

Design, motion planning and control of a reconfigurable hybrid structure

Phocas

Christoforou

Matheou

2015

Engineering Structures

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“…Other common types of deployable structures include planar and spatial scissor-hinge elements. These have the ability to expand in both horizontal and vertical direction [13][14][15]. While such structural elements need additional stabilizing members like cables or other locking devices, self-stable structures can be achieved with the application of special geometrical configurations through additional inner scissor-like elements.…”

Section: Introductionmentioning

confidence: 99%

On the morphology of reconfigurable hybrid structures based on the effective 4-bar mechanism

Matheou¹,

Phocas²,

Christoforou³

2017

Int. J. CMEM

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Reconfigurable systems of hinge-connected beams strengthened through struts and continuous cables, utilize their morphology and cable active members through a synergetic process to enhance structural flexibility, stability and energy efficient transformability. The 'effective 4-bar' concept may be applied for the transformation of planar n-bar systems, using a sequence of 1-DOF motion steps through selectively locking (n-4) joints of the primary members and actuating the cables, in order to adjust the system's joints to the desired values during the motion steps involved. The control system includes only two motion actuators located at the structural supports, as well as brakes installed on each individual joint. It performs the reconfiguration sequences through tensioning of one single cable at a time. A numerical investigation presented in the current paper involves four arch systems of 8, 9, 10 and 11-bar linkages with 60/90, 75/75 and 90/60 cm strut lengths on each side of the systems' circumference. In their initial position, all arch systems have 5.0 m span and 5.35 m height following a quasi-vertical ellipsoid shape. The target configuration of the systems with 4.20 m height corresponds to a quasihorizontal ellipsoid shape. Different reconfiguration sequences are investigated, in order to achieve the target configuration for each system. The comparative numerical analysis refers to the maximum stresses developed in the members and the required brake torques for each transformation. The analysis provides an insight into the hybrid structural morphology and mechanical characteristics of the members for optimal implementation of the reconfiguration approach.

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“…Relevant studies on the analysis of the deployment mechanisms, folding concepts and shape control based on stress analysis are included in [29][30][31][32]. Planar and spatial scissor-hinge elements comprise further common types of deployable structures with the ability to expand in a horizontal or in both horizontal and vertical direction [33][34][35]. While such structural elements need additional stabilizing members like cables or other locking devices, self-stable structures can be achieved with the application of special geometrical confi gurations through additional inner scissor-like-elements.…”

Section: Introductionmentioning

confidence: 99%

Design concept of a kinetic form-active hybrid envelope structure

Phocas¹,

Kontovourkis²,

Nicolaou³

2014

Int. J. DNE

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In architecture and specifi cally in the design of structures, natural systems are of particular interest as far as their principle integral characteristic is concerned, that of a multi-layered, fi nely tuned and differentiated combination of their components, leading to an optimization and autonomous adaptability with regard to varying external conditions. At the same time, the development of contemporary adaptable lightweight structures takes place on the basis of tensegrity, scissor mechanisms or primary members with predominant bending deformability. Driven by the principle integral characteristic of natural systems, the design concept of a kinetic hybrid structure for a building membranes' envelope is presented in the current paper. The primary structure is composed of scissor compression and bending-active members interconnected in series through continuous tension-only members with closed circuit. The transformability of the system case example is presented in an initial confi guration and fi ve transformation states that correspond to respective transformation states of the membranes' envelope. The integral composition of the kinetic hybrid structure is described with its confi guration and parametric associative design. A preliminary investigation of the system's horizontal load-bearing behaviour throughout its transformation pathway follows a discussion on the motion planning of the structure. The latter builds on issues of the integrative development of the static and kinematic system, as well as minimization of external energy consumption for obtaining different operational confi guration states.

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Curved Expandable Space Grids

Cited by 19 publications

References 0 publications

Design, motion planning and control of a reconfigurable hybrid structure

Design, motion planning and control of a reconfigurable hybrid structure

On the morphology of reconfigurable hybrid structures based on the effective 4-bar mechanism

Design concept of a kinetic form-active hybrid envelope structure

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