TAICHUNG METROPOLITAN OPERA HOUSE

source: designboomcom

according to taichung city officials, the project was put up for bid five times over the past several years but failed to attract suitable tenders due to associated engineering challenges. while other major cities in taiwan are all known for something, taichung, a city of roughly 1 million residents whose name means ‘central taiwan’ in chinese, has trouble finding anything to distinguish itself from taiwan’s other metropolises. today it is seen as one of the most cultural cities in taiwan.

the main structure will be formed with several connecting curved walls, inlaid floors, inlaid interior and exterior walls, and a core service wall. the curved wall structure will be formed with 58 curved wall units, creating many complications in building steel bar reinforcements and steel trusses. the construction technique is the first of its kind in the world of architecture and has never been seen before in the taiwanese engineering industry,which meant that many local construction companies failed to show interest in participating in the project.

in order to acquire the cooperation of the ideal company, the city government visited many potential collaborators and finally signed a contract with lee ming construction. wu chun-shan, president of lee ming construction, said building such a structure containing three-dimensional curved walls was generally thought impossible. ‘but we are making the impossible possible’.

issues of the environment, resources, and energy

1. recycling of rainwater and sewage the rain falling on the large roof surface will be collected and filtered for use in irrigation and sprinkling for landscaping plants, etc. sewage from the facility will be processed in a purification tank to approximately 5ppm BOD and 5ppm SS, and then reused as an intermediate water supply for purposes such as toilet flushing.

2. use of eco-materials the majority of materials used will be recyclable eco-materials. this helps to limit the environmental load and conserve resources, thereby contributing to the reduction of carbon dioxide emissions and prevention of global warming.

3. adjusting the surrounding environment for energy savings when adjusting the environment of an architectural space, it is not enough to devote one’s energies solely to the load inside the building. it is also essential to arrange the environment outside the building in a way that reduces the load inside the building. in this plan, we have given consideration to increasing greenery, creating shade, and using the evaporative latent heat of water.
construction process

the structural system is developed together with the construction method to realize the freeform geometry in rational and efficient manner. the freeform concrete surfaces are shotcrete (spray concrete). it is commonly utilized for tunnel construction and suitable for curved surface. it can be shot horizontally or vertically. rather than constructing doubly curved formwork that is expensive and time consuming on site, the temporary structure in the void creates faceted surfaces that best-fit the finished surface. between the temporary steel work,expanded metal mesh is expanded metal mesh spans between the temporary steel work to act as faceted formwork. 150 mm thick concrete can be shot at one time. the surface layer of 25 mm is shot separately without large aggregate to achieve smooth surface finish. concrete thickness varies between 200 mm at the top floor and 350 mm at the bottom.

sprayed concrete construction method

typically, an expanded metal mesh is used as a permanent back shutter to which the reinforcing mesh is affixed. the concrete is sprayed onto the expanded metal and the reinforcement is fully enclosed. the concrete is typically sprayed using one of two methods. with the dry process, the dry constituents of the concrete are mixed in a portable batching plant and the water is added to the mix at the nozzle. with the wet process, the water is added to the batching plant and premixed with the dry constituents and the wet concrete is sprayed from the nozzle. the benefits of the wet process are that there is greater control over the concrete mix as the concrete is often mixed off site by ready-mix contractors and delivered in lorries. it is common practice to apply the concrete in two layers. the first thick layer is usually applied using the wet process. once sufficiently cured, a second, thin finishing layer is then applied using the dry process.

it is essential that the finished product is cured appropriately to mitigate shrinkage and to ensure that design strength is achieved. spraying concrete is a messy process. some concrete will rebound and some will pass through the expanded metal back shutter. it may be necessary to install temporary protection to avoid polluting the surrounding area.
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source: setdearquitecturablogspotcom

Se ha celebrado en Taichung -tras varios intentos fallidos por falta de ofertas para su construcción- el inicio de las obras del edificio del Metropolitan Opera House’ diseñado por el arquitecto japonés Toyo Ito. La nueva instalación cultural, pensada como símbolo de distinción de dicha ciudad taiwanesa puntera en la actividad cultural, albergará un gran teatro para 2013 personas, un auditorio intermedio de 800 butacas y una sala pequeña para 200 espectadores. Y todo ello envuelto por muros curvados en sus tres dimensiones de forma que crea espacios y formas orgánicas en secciones, plantas y alzados.

Las formas libres que caracterizan las estructuras del edificio se materializarán meidante hormigón proyectado, ya que su puesta en obra es mucho más barata que la que supone el hormigón convencional, montando encofrados hasta conseguir las caprichosas curvas del proyecto. En este caso el encofrado lo forman unas mallas de metal expandido que, por sus características intrínsecas, se adaptan a cualquier forma y retienen el hormigón una vez vertido. Aunque ésta parezca una explicación lógica y sencilla, el proceso es altamente complejo y requiere un control técnico exhaustivo tanto de la dosificación previa del hormigón como de su puesta en obra y de su posterior curado, que evitará indeseables fisuras producto de la retracción del material.

Además de la complejidad técnica, el edificio pretende colocarse como abanderado de la sostenibilidad, para lo cual se marcan tres objetivos: el reciclaje de agua de lluvia y residual, el uso de materiales ecológicos y el ajuste del entorno del edificio para favorecer el ahorro de energía en el mismo.

Se prevé que la obra, que costará alrededor de 135 millones de dólares, esté preparada para su inauguración a finales del año 2013.
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source: archdailycombr

Projetada em 2006 e em construção desde 2009, a aguardada Taichung Metropolitan Opera House do escritório Toyo Ito & Associates foi, enfim, inaugurada. O projeto é notável por suas formas internas curvas e cavernosas, que produzem um corte dramático e complexo, nitidamente resolvido em uma forma externa retilínea. O fotógrafo taiwanês Lucas K Doolan visitou a Opera House para estudar seus impressionantes espaços internos e sua presença no contexto urbano. Veja o resultado em suas fotografias, a seguir.
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source: npacnttorg

歌劇院以推動表演藝術發展為核心使命，
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