Digital Timber Portfolio

enrico valentino tagliaboschi

D I G I T A L T I M B E R P ORTFOLIO

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Technical Skills 3d modeling and visual scripting Rhino + Grasshopper

C# scripting RhinoCommon

G-code programming G and M functions, ISO 6983

5-axis CNC milling and sawing M.Sc in Architecture and Building Engineering e-mail: evtagliaboschi@gmail.com phone: +39 340 963 5486

TPS and OpenNest plug-in for GH

Robot programming KUKA|prc, Robotmaster

Working drawings and project schedule

Gantt Chart, Health and Safety Management

Prototyping

Basic handcrafted carpentry

CONTENTS

HEXBOX CANOPY →p.4

FUNICULAR FUNNEL SHELTER →p.12

HEXBOX CANOPY

A Rapid Assembly Segmented Timber Shell with Wedge Joints

what?

Experimental pavilion/wood-only structure

where?

Wilkinson Building, the University of Sydney School of Architecture

when?

2019

who with?

Design Team: Christopher Robeller, Eduardo De Oliveira Barata, Felix Schmidt-Kleespies Fabrication: Rodney Watt, Lynn Masuda Photographs: Katherine Lu (pp. 4-5)

why?

Master Thesis project/international collaboration between researchers from the University of Kaiserslautern and the University of Sydney

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The theme The HexBox Canopy demonstrates a new “plug & play� system for the rapid on-site assembly and disassembly without formwork of a segmented timber shell, consisting of relatively inexpensive, prefabricated hexagon-shaped boxes made from plywood plates.

With 1531 timber segments mak-

ing up 201 boxes, the HexBox shell is made exclusively of plywood components without the addition of any kind of metal fasteners for the main load-bearing structure.

The major novelty is the implementation of wood-only connections between the boxes, which are produced from cut-off waste material from the cutting of the main plates of the structure.

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Wood-only wedge joints Connectors between the hollow segments are inspired by traditional wedge joints, which were a smart and common method in handcrafted carpentry and cabinetmaking. Rather than attempting ultra precisely fabricated elements, the diagonal shape of wedges allows assembling boxes even when there are small imprecisions. Additionally, these joints allow for gradually pulling and forcing the boxes together, closing gaps between segments that may occur during assembly.

Algorithmic design The generation of an overall number of 1531 of different geometries has been made possible through an in-house plugin for Rhino 6 developed at the DTC group. The plugin takes a planar mesh as an input and a bunch of parameters defining the plate thickness, the height of boxes and the offset for bottom plate aperture. Then, it generates the actual B-rep geometries as well as the deconstructed ones ready to be nested and processed for the fabrication.

Self-clamping gluing aids Plates comprising a structural module are glued together using a novel technique exploiting Lamello Tenso connectors that allow for the simple and safe 1K PUR adhesive joining of thousands of miter joints with individual dihedral angles.

TOP PLATE GLUING AIDS SIDE PLATES

WEDGE CONNECTORS

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BOTTOM PLATE

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Step1_ Drilling and installation of threaded bars with chemical anchors.

Step2_ Installation of anchoring plates to the concrete parapet and to the top ring beam.

Step3_ Installation of the footing ribs.

Step4_ Installation of the first group of plywood boxes, which form the first load-bearing arch of the structure.

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Step5_ Grow lengthwise the first load-bearing arch adding gradually the second group of plywood boxes.

Step6_ Grow lengthwise the first load-bearing arch, adding gradually the third group of plywood boxes.

Step7_ Installation of the fourth group of plywood boxes.

Step8_ Installation of the fifth group of plywood boxes.

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FUNICULAR FUNNEL SHELTER

what?

Canopy for public transportation

where?

-

when?

2017

who with?

Paola Pulella, Alessandro Riello, Sara Tenchini

why?

Academic project Module: Design of Special Structures Mentor: Prof. Maurizio Froli

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The theme The overall design entailed a four-meter-high canopy for public transportation, which covers an area of 800 square meters (8x100). The challenge was to develop an architectural geometry that met the practical needs of shelter, structural coherence, and efficiency.

The starting points were: 1. Reducing supports as much as possible to create an open space 2. Allowing ease of access for the buses 3. Covering all usable spaces

Shaping forces We used a form-finding digital method based on the particle-spring system. This solution is associated with the funicular structures exploited by Antoni GuadĂŹ, Heinz Isler, Frei Otto, and many others. The primary goal of such a structure is to avoid bending as much as possible. Therefore, this encompasses better utilization of the cross-section of the shell; allowing the implementation of thin structural elements.

Resulting in, economical materials and a lightweight structure.

Digital fabrication The key benefits of computer numerical control machines are the automatization of the entire fabrication process and a faster assembly on site. We imagined obtaining the elements of the canopy in cross-laminated timber panels, that are cut by CNC router.

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Pedestrian flows The distance between each support is 11 meters. This lets people move easily under the covered space.

Accessibility to buses Central supports let people walk up to buses smoothly. Nobody runs the risk of getting wet.

8x100 meters-covered surface The whole assigned space is exploited.

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1_base mesh A planar quad-mesh is shaped within the project boundaries. Base constraints are identified.

3_remeshing Panels are smaller near constraints where stresses are grater to reduce second-order effects.

2_particle spring simulation Through the Grasshopper plug-in Kangaroo Physics, we assign elastic properties to the membrane.

_4 digital fabrication We generate plates geometries through the Grasshopper plug-in Timber Plate Structure.

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Utilization Calculated as the ratio between the yield stress of the material and maximum Von Mises stress along the shells cross-section

Principal stress one First principal stress on shells calculated respectively at the upper, middle, and lower layers.

Principal stress two Second principal stress on shells calculated respectively at the upper, middle, and lower layers.

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last revision January 2020