日本大型建筑改造：巨大的玻璃屋顶覆盖一个没有柱子的空间—

新宿住友大厦建于1974年，位于东京西新宿区。该基地广阔的“Sankaku Hiroba”(三角形广场)中庭屋顶，以及相关的翻新，为解决日本城市的一个新兴问题提供了一个可持续的模式:如何使用良好的维护实践对大型建筑进行改造。该项目也代表了社会更大的努力，以活跃城市商业区，并提高其作为一个可访问的聚会场所的价值。 The Shinjuku Sumitomo Building was built in 1974 in Tokyo’s Nishi Shinjuku district. The site’s expansive “Sankaku Hiroba” (triangular plaza) atrium roof, along with associated renovations, offers a sustainable model for addressing an emerging problem for Japan’s cities: how to carry out renovation projects on large-scale buildings using good maintenance practices. The project also represents a greater societal effort to enliven the urban business district and enhance its value as an accessible gathering place.

The Shinjuku Sumitomo Building was built in 1974 in Tokyo’s Nishi Shinjuku district. The site’s expansive “Sankaku Hiroba” (triangular plaza) atrium roof, along with associated renovations, offers a sustainable model for addressing an emerging problem for Japan’s cities: how to carry out renovation projects on large-scale buildings using good maintenance practices. The project also represents a greater societal effort to enliven the urban business district and enhance its value as an accessible gathering place.

在商业区创建一个充满活力的公共空间——该建筑的建造是对未知的一次冒险，可以说，通过创新和新技术来应对众多挑战。到21世纪初，也就是建成近30年后，西新宿地区已经成为一个成熟的商业区，并面临着如何振兴一个日益多样化的城市的挑战。

Creating a Lively Public Space in the Business District - The building’s construction was a venture into the unknown, so to speak, made possible through innovation and new technologies for tackling numerous challenges. By the early 2000s, nearly 30 years since its completion, the Nishi Shinjuku area had matured as a business district and faced the challenge of how to invigorate an increasingly diverse city.

为此，新宿的公共和私营部门携手重组，最终取得了成果。其中一个公共空间建在建筑室外广场的私人区域，上面覆盖着巨大的玻璃屋顶。人们希望这个室内空间能够推动大都市新宿转变为一个更有活力和吸引力的城市。这个项目不仅仅是改头换面;它显示了这种高层改造的巨大潜力，旨在提高城市的功能和价值，以满足新时代的要求。

To that end, Shinjuku’s public and private sectors joined hands in a reorganizing effort that is finally bearing fruit. Among them is the public space built in the privately-owned area of the building’s outdoor plaza, covered with a massive glass roof. Hopes are high that this indoor space will spark a transformation of metropolitan Shinjuku into a more lively and appealing city. The project is more than a mere makeover; it shows the great potential of such high-rise renovations that aim for urban functionality and value enhancement to meet the demands of a new era.

翻修仍在使用的高层建筑——该项目是在建筑仍在使用的情况下进行的。玻璃屋顶的建造与主要的维修工作同时进行。巨大的钢结构屋顶(长140米，宽90米，高25米)覆盖了一个没有柱子的中心空间。在地面上使用了伸缩缝，因此屋顶在结构上是独立的。屋顶支撑柱沿着场地的周边和现有的周边策略性地集中，以最小化对设施更新和其他活动的影响。

Renovating a High-Rise Still in Use - This project was undertaken while the building remained in use. Construction of the glass roof was performed concurrently with major repair work. The huge steel-structured roof (L:140m, W:90m, H:25m) covers a central space devoid of columns. Expansion joints were used above ground so the roof could be structurally independent. Roof-supporting columns were strategically concentrated along the site’s perimeter and the existing periphery in order to minimize the effects on facility renewal and other activities.

在屋顶施工的同时，对整个建筑进行抗震改造，以更好地抵御地震相关影响和振动。利用建筑现有的设备阳台，二层安装了惯性旋转阻尼管，连接到49层，以吸收建筑的动能。所有的任务都在不干扰建筑外部或办公空间的情况下完成。

Concurrent with the construction of the roof, seismic retrofitting was performed on the entire building to better counter earthquake-related effects and vibration. Using the building’s existing equipment balconies, second-floor inertial rotary damping tubes were installed to connect up to the 49th floor in order to absorb the building’s kinetic energy. All of the tasks were performed without disturbing the building’s exterior or office workspaces.

继承景观，重新设计遗产——新宿住友大厦长期以来一直被亲切地称为“Sankaku(三角形)建筑”，因为它独特的外观和引人注目的室内外细节。在这个项目中，尊重传统景观的新空间被重新设计。例如，红色花岗岩以前用于外部(现在不再开采)被重新使用在车辆入口的墙壁上。来自前外墙设计的砖块(灵感来自Yodobashi净化工厂的砖块主题)使用层压砖“重新创造”，集成了空调、隔音和墙壁绿化功能。

Inheriting the Landscape & Redesigning the Legacy - The Shinjuku Sumitomo Building has long been affectionately called the “Sankaku (triangle) Building,” both for its distinctive outward appearance and for its striking interior and exterior detail. For this project, new spaces that respect the legacy landscape were redesigned. For example, red granite formerly used in the exterior (now no longer mined) was reused in the walls of the vehicle entrance. Bricks from the former outer wall design (inspired by the Yodobashi Purification Plant’s brick motif) were “recreated” using laminated bricks that integrate air conditioning, sound deadening, and wall greenery functions.

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建筑师：Nikken Sekkei

地点：日本

面积：180195 m2

年份：2020