Striatus Bridge: A 3D Printed Concrete Structure in Venice

A pedestrian bridge that was created in Italy by Zaha Hadi Architects, Block Research Group and Block Research Group is freestanding. It’s unreinforced. Let’s take a look at the bridge of striatus.

This bridge was made from 53 3D printed concrete blocks. It is the first 3D concrete printed bridge. It is amazing how unique this structure looks! Keep reading for more amazing information about the bridge.

Striatus Bridge

Striatus Bridge

Architects: Block Research Group + Zaha Hadid Architects

Location: Venezia, Italy

Area: 50 m2

Year: 2021

Status: Built

Typology: Bridge

The Block Research Group at ETCH and Zurich Zaha Hadid Architects Computation and Design Groups, (ZHA CODE) have collaborated on a project with incremental 3D (in3D) and Holcim. Recenty, they revealed a concrete-masonry footbridge in arched form. It is one of a kind and can be found in Venice, Italy’s Giardini Dalla Marinaressa.

The project is called “Striatus,”It was designed exclusively to be used by the ” Time Space Existence exhibition. It was organized by ECC (European Cultural Centre), as part of the Venice Architecture Biennale 2020. From May 22nd to November 2021, the public is invited to view the exhibit.

It is approximately 6×12 meters or 40×52-foot. It is however “the first” of its kind. Learn more about this remarkable construction.

What exactly is Striatus, you ask?

Striatus Bridge

Striatus, an unreinforced arched masonry footbridge is called.

The footbridge’s entire structure is composed of 53 3D-printed concrete blocks structures. The uniqueness of this construction lies in the fact that it was assembled without mortar and reinforcement. It’s quite shocking, right?

What does “Striatus”, the name, mean? The architects claim that Striatus is a reflection of its structural logic, and fabrication process.

Striatus Bridge

This combination of traditional master builders’ methods is a new construction method. It includes engineering, advanced computation, and robotic manufacturing technology.

Striatus Bridge

Philippe Block from ETH Zurich, is the codirector for the Block Research Group. Geometry is able to create strength from a fraction the conventional concrete beams. You can now build stronger and greener products.

Design: A New Language For Concrete

Striatus Bridge

This bridge design suggests that concrete has a new language. It refers to how blocks are placed in order to be more environmentally friendly and exact.

Striatus Bridge

Each day millions of concrete structures are made with reinforced concrete. These large CO2 emissions result in high levels of carbon dioxide. Concrete reinforcement can be done with cement and steel. These items can greatly impact our environment, and they are very harmful to the planet.

Striatus Bridge

Researchers at ETH present a method for reducing both by using Striatus. This arch is made of concrete blocks and looks similar to traditional masonry bridges. This compression-only technique allowed the forces to travel all over the world. All of them are finally linked on the ground.

3D Concrete Printing (DCP) and contemporary design are powerful, innovative alternatives to traditional concrete construction.

Striatus Bridge

Concrete is printed in layers that are orthogonal with its main structure. This creates an environment of trust. “striated compression-only funicular structural that can be constructed without reinforcement. 3D printing allows you to make load-bearing concrete structures. This is a great example of how it works. These buildings will require less material than traditional concrete structures and won’t require mortar or steel reinforcement.

Striatus Bridge

Zaha Hadid Architects said, “Striatus maximizes masonry structures and 3D Concrete Printing (3DCP) and contemporary design. It offers an alternative to traditional concrete buildings.”

Concept: The Striatus Bridge

Striatus Bridge

The Striatus bridge represents the three R’s of circular economics: Reuse, Reduce and Recycle. This bridge also shows how the same technique can easily be applied to concrete structures all over the globe.

RELEASE To achieve maximum strength and minimize waste, the bridge has been designed so that only a small number of materials are used.

REUSE Each block and component can be disassembled and reassembled.

RECYCLE The bridge’s components can all be recycled easily with a very limited amount of energy or cost.

Striatus Bridge

It is free of glues and reinforcements so you don’t have to separate materials. Recycling is easy and affordable because of this.

Striatus Bridge

Jan Jenisch, Holcim CEO: “Striatus was designed by some of the most talented and creative architects in their respective fields. This is an example of 3D Concrete Printing’s endless potential, which allows you to create more durable, faster and more functional building structures without having to compromise on functionality or aesthetics. This digitally designed circular design enhances concrete’s beauty. The design is minimally invasive, can be assembled multiple times and recycled infinitely.

Concrete Construction: Robotic 3D Printing

Striatus Bridge

Many 3D-printed buildings were previously seen, such as TECLA (a Clay 3D Printed Building). Incremental3D created the Striatus Bridge’s latest feature: 3D-printed concrete.

Striatus Bridge

Concrete here is applied vertically differently than normal. Concrete should be used at angles that coincide with the flow and compression force. All layers can be combined without reinforcement or posttension. Amazing, right?

Striatus Bridge

Holcim created the two-component concrete ink (2K), which can be used to print the blocks for the bridge. This structure is dry-assembled, however it remains very stable due to its geometry.

Zaha Hadid Architects Block Research Group

One mortar is sufficient to construct the block blocks. The bridge can then be disassembled easily and reassembled in different places.

Shajay Bhooshan is the Head of CODE at Zaha Hadid Architects’ Computation and Design research organization. According to him, “Striatus is built upon the shoulders and great men.” It revives ancient techniques by incorporating the structural logic of the 1600s to today’s digital engineering and robotic manufacturing technology. Its strength and tactile qualities, as well as aesthetic appeal, reflect our vision, Patrik Schumacher (principal partner), that beauty is a promise to perform.

3D Concrete Printing, Assembly and Installation

Zaha Hadid Architects Block Research Group

To produce 53 3DCP voussoirs as well as concrete blocks, non-parallel layers of printing were employed. Each layer is orthogonal to the other. To prevent delamination between the layers of print, these layers are held together with compression.

A solid block is not used because architects wanted to lower material requirements.

Zaha Hadid Architects Block Research Group

It is constructed on two levels with masonry structural logic. It can either be constructed as one large structure, or as a set of individual blocks.

It acts as a set of unreinforced vosoir arches. This bridge also has the same structural principles as arched Roman stone bridges. 3DCP layers that are on the same level with the blocks or vossoirs behave as traditional brick masonry. It is apparent in the nubian vaulting inclined rows and bricks.

Zaha Hadid Architects Block Research Group

Striatus’ freestanding bridge makes a fantastic alternative to the inefficient standard floor slabs.

Zaha Hadid Architects Block Research Group

Surprised to discover that the floor system requires 30% less concrete and 10% less steel than conventional reinforced concrete slabs.

It is ready-made and preassembled. The structure can then be quickly disassembled and reassembled. You can easily recycle the floor system at any time.

Zaha Hadid Architects Block Research Group

In the next 30 year, approximately 300 billion square metres will be added to global floorspace. These floors are capable of supporting more than 40% of the weight of tall-rise buildings (100+ stories).

Zaha Hadid Architects Block Research Group

Striatus Bridge

Let’s get to the bottom

This is Striatus Bridge. It was designed by Block Research Group Architects, and Zaha Hadid Architects. The bridge structure is an example of how 3D printing can make load bearing concrete structures. The method doesn’t require special materials and does not need steel reinforcement.

The new flooring system is both recyclable and can help save material. This floor system is very good for the environment. Striatus is changing the face of construction. This positively impacts our thinking. This will allow us to be more conscious of designing and building sustainable structures. This will make our generation’s future sustainable.

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