*사장교 구조형식의 서클 브릿지 [ ipv Delft ] Hovenring, Circular Cycle Brigde

아인트호벤과 벨트호벤, 두 도시를 연결하는 원형브릿지는 증가하는 보행자와 자전거 이용자의

안전한 이동을 위하여 설치되었습니다. 아인트호벤시의 요청과 같이 도시의 관문으로써 브릿지는

상징성과 심볼성을 장소에 담아 내야 합니다. 이러한 건축주의 요구는 디자인 스튜디오 '아이피디 델프트'

의 손을 거쳐 구조와 기능이 하나로 엮여 조형적인 아름다움을 물씬 풍기는 랜드마크 브릿지로 완성됩니다.

중앙에 위치한 72미터 높이의 스틸 파일론과 얇은 서클데크 밴드를 연결하는 24개의 스틸케이블은

사장교와 같이 브릿지의 자중을 주탑으로 전달하는 구조적 특징을 보이며 하부에 위치한

차량 도로에 간섭이 없는 드라마틱한 디자인을 보여주게 됩니다. 이렇게 꼭 맞추어진

디자인 설계는 기능과 구조가 합쳐진 토탈 디자인으로 발현됩니다.

아이트호벤의 명물로 자리 잡을 것입니다. 이 써클 브릿지는

 reviewed by SJ

he spectacular circular cycle bridge in the Dutch city of Eindhoven has recently (June 2012) been opened to the public. The cable-stayed bridge, designed by ipv Delft, offers cyclists and pedestrians an exciting crossover. With its impressive pylon, 72 metre diameter, thin deck and conspicuous lighting, the cyclist roundabout is a new landmark for the city.

Like a flying saucer, the steel bridge hoovers above the Heerbaan/Meerenakkerweg intersection, its impressive pylon marking the entrance way to the cities of Eindhoven and Veldhoven. There used to be a level crossing here, but the development of a nearby housing estate meant the intersection needed changing in order to cope with growing traffic. As Eindhoven City Council refrains from cyclist underpasses and didn’t want a level crossing roundabout either, they asked Dutch bridge specialist ipv Delft to look at possible solutions. A circular cable-stayed bridge soon appeared to be the best option.

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Design: ipv Delft
Client: Municipality of Eindhoven
Completion date: 2012
Location: Einhoven, The Netherlands
Dimensions: Height 70m, Diameter 72m

Structure
The bridge comprises a 70-metre high pylon, 24 steel cables and a circular bridge deck and is made out of steel. The cables are attached to the inner side of the bridge deck, right where the bridge deck connects to the circular counter weight. This way, torsion within the bridge deck is prevented. The M-shaped supports near the approach spans also ensure stability.

One of the challenges of the design process was the spacial integration. The existing infrastructure and buildings set the boundaries for the grades of the slopes leading up to the roundabout. As space was limited, it was decided to lower the ground level of the intersection underneath by a metre and a half, allowing for a comfortable slope for pedestrians and cyclists.

Tailor-made
The design and building process offered many technical challenges as well. Ipv Delft had a very clear view of what the bridge should look like: little more than a thin circular bridge deck and a powerfully shaped pylon. Amongst other things, this meant the standard way of attaching cables to the pylon wouldn’t suffice, as it would result in a bulk of steal near the pylon top. Therefore, a tailor-made solution was designed. The same applies to the M-shaped supports near the span bridges.

Lighting design
Befitting Eindhoven’s identity as the ‘City of Light’ (Eindhoven is home to the Philips company), ipv Delft also made a lighting design for the Hovenring. One of its main elements is integrated into the circular deck. The space in between counter weight and deck has been fitted with aluminum lamellas, translucent sheeting and tube lighting, which results in a clearly visible ring of light at night. Together with the illuminated pylon, the ring of light ensures the bridge’s spectacular appearance at night.
The functional lighting is integrated into the railing, where LED-lighting illuminates the bridge deck and ensures facial recognition of the bridge users at the same time. Lights attached to a cable framework in between pylon and bridge deck and to the inner surface of the circular counterweight illuminate the intersection underneath.

Both day and night, the pylon bridge is a true eye-catcher, spectacular in its simplicity.

from  landezine