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Estructura de madera resistente que se mueve a merced de terremotos en vez de luchar contra ellos

Resumen

Tipo:
Oferta Tecnológica
Referencia:
TOCH20171024001
Publicado:
03/11/2017
Caducidad:
03/11/2018
Resumen:
Una empresa suiza de ingeniería ha desarrollado estructuras de madera resistentes formadas por vigas y columnas conectadas por un tendón. Gracias a la prefabricación, este sistema permite una construcción rápida, además de un buen rendimiento sísmico debido a su flexibilidad. La estructura es capaz de soportar cargas verticales (gravedad y cargas estáticas y dinámicas) y horizontales (vientos y terremotos). El tendón produce un efecto retráctil, lo que significa que debido a su flexibilidad lateral la estructura puede moverse a merced del terremoto sin ser dañada. La empresa ofrece servicios de diseño de esta estructura a arquitectos, ingenieros, constructoras o desarrolladores. El objetivo es establecer acuerdos de joint venture, servicio o cooperación técnica.

Details

Tittle:
A resilient timber frame building structure moving with the earthquake rather than fighting it
Summary:
The resilient timber building frames are composed of beams and columns which are connected by a tendon. This system allows for fast construction due to prefabrication and for good seismic performance due to its flexibility. A Swiss engineering company offers design for such structures for architects, engineers, construction companies or developers. Partner agreement sought: Joint venture agreement, services agreement or technical cooperation agreement.
Description:
Background:
Using wood as a construction material instead of concrete or stone has become popular in the past decades. This is not only due to the "green" way of construction, or that it fits in a circular economy, but also due to innovation and technology that pushed the boundaries for wooden construction. The resilient timber frame building structure of the Swiss company founded in 2016 by researchers is one of these technologies.

Moving with the earthquake rather than fighting it:
The frame (see picture 1) is built with glulam beams made from Norway spruce (softwood). The columns and the beams´ bottom lamellae are made from European ash (hardwood). This hardwood reinforcement is needed in areas where high stresses perpendicular to the grain occur, i.e. in the beam-column interface. A tendon is placed in a cavity in the middle of the frame and anchored at the end with steel plates. The steel plates transfer the force from the tendon to the specimen leading to a compression of the connection itself, which leads to a semi-rigid moment resistant connection.
The resilient timber frame building structure is therefore able to carry vertical loads (gravity, dead and live loads) as well as horizontal loads (wind, earthquakes). Moreover, the tendon leads to a snap-back effect, this means that the frame can move with an earthquake due to its lateral flexibility without damage. (This in analogy with a "wakouwa push puppet").
As soon as the earthquake is over, the frame will move again to its initial state thanks to the tendon that is pulling the frame back.

Characterization:
The system is characterized by:
- A very high degree of prefabrication
- There is no need for a concrete or wooden core up to 3 or 4 stories
- The resilient timber frame building structure can also withstand larger earthquakes (for example the one that occurred in Amatrice on the 28th of August 2016)

Cooperation:
The engineering and the design of the frame are done by a young company founded in 2016 by researchers in timber engineering who developed the system at one of the Swiss Federal Institutes of Technologies. The company focuses on engineering and consulting in construction.
The resilient timber frame building structure is of interest for architects, engineers as well as developers or communities who are looking for a timber structure in seismic but also non-seismic areas.
The type of cooperation to get resilient timber frame building structures implemented in other countries and regions specific building and construction markets could be via joint venture agreement, services agreement or technical cooperation agreement.
Advantages and Innovations:
- The resilient timber frame building structure allows for fast construction process due to prefabrication using hard- and softwood elements with post-tensioning.
- The floor plan remains flexible due to the frame construction, i.e. all elements in the room can be removed as only the frame is load bearing.
- There is no need for a concrete or wooden core up to 3 or 4 stories
- Moreover, the frame can also be used in seismic areas as it is able to withstand even larger earthquakes without much damage.
Stage of Development:
Already on the market
IPs:
Secret Know-how

Partner sought

Type and Role of Partner Sought:
The specific area of activity of the partner:
- Manufacturer of structural timber elements, building developer, architects.


The tasks to be performed by the partner sought:
- Joint venture agreement:
Create jointly a new entity to create architecture, design of buildings for seismic regions.

- Services agreement:
The partner receives the engineering and consulting of the Swiss company for architecture, design of buildings for seismic regions.

- Technical cooperation agreement:
Joint development of the skills and technology for resilient timber frame building architecture, design of buildings for seismic regions.

Client

Type and Size of Client:
Industry SME <= 10
Already Engaged in Trans-National Cooperation:
No
Languages Spoken:
English
German

Keywords

Technology Keywords:
02007020 Biobased materials
06006001 Biomateriales
02006006 Construction engineering (design, simulation)
02006002 Construction methods and equipment