*포럼 앳 에켄버그 짐나지움, 중공슬래브 그 구조적 아름다움 [ Ecker Architekten ] The Forum at Eckenberg Gymnasium

광활한 대지위에 60~70년, 지어진 11개동 Eckenberg 아카데미 캠퍼스의 중앙에

새로운 허브가 생성된다.-Adelsheim 지역에 위치한 아카데미는 1960~70년 사이에 걸쳐

완공된 11개의 동으로 구성된다.-

기존 6층 건축물 두개동 사이에 위치한 포럼 짐나지움은 다음과 같은

프로그램으로 구성된다.

오디토리움, 도서관, 다목적실, 학생휴게실, 카페로 구성되며 기존 건축물과의 관계속에서

다양한 레벨 공간 속에 배치된다.

-메인 오픈스페이스는 거리에 위치한 테라스와 기존 건축물의 저층부에

위치한 교실과 램프 및 계단으로 연결. 도서관과 스터디룸은

기존 교실에 인접하며 외부 리딩 정원과 연결.

오디토리움과 그 하부에 위치한 카페, 라운지, 인터넷 스테이션은

서측 출입구와 집적 연결.-

여기 포럼 엣 짐나지움의 건축공간을 두드러지게 하는 오픈플랜은 3개의 원형기둥으로

지지되는 3차원 라쿤나(lacunar) 콘크리트 슬래브로-roof concrete slab-

연속된 무주공간을 확보하며 연속된 동심원 패턴이 특징인

디자인으로 구현된다.

그리고 무주공간 연출을 위한 중공슬래브는 구조를 위한 기능적 확보는 물론

공간의 고유한 캐릭터를 구체화하는 중요한 요소로 작용한다.

-콘크리트 슬래브의 연속적인 언듈레이션을 통해 전체 슬래브의 강성을 확보하며

슬래브 자체를 경량화 시킨다.-

이러한 특징을 갖는 포럼 앳 짐나지움은 캠퍼스 내에 발생하는 다양한 커뮤니티를 통합, 소통시키는

허브로 제안되며 캠퍼스를 대표하는 구심점이 된다.

reviewed by SJ

The Forum at Eckenberg Gymnasium, Adelsheim

Ecker Architekten are pleased to announce the completion of the Forum at the Eckenberg Gymnasium in Adelsheim, a project of the Baden-Württemberg Department of Property and Construction - Heilbronn Office. Construction began in late 2011.

---

Architect and project leader: Ecker Architekten
Structural engineering: Rehle Engineers
Structural analysis and inspection: Kist Engineering
Mechanical and electrical engineering: CARPUS+Partner
Light design engineering: Belzner Holmes
Acoustic engineering and building physics: Krämer-Evers

Integration into the spatial and educational environment

The extensive campus of the Eckenberg Academy is located on a scenic hillside overlooking the town of Adelsheim. The entire campus consists of 11 individual buildings from the 1960s and 70s. The solitary two and three-story buildings line the slope in a regular fashion; but this regularity lacks a visible hierarchy, and no perceivable campus centre is evident. A deficiency of flexible, unallocated indoor space meant that the student body had insufficient opportunities for social gathering, and extra-curricular activities offered by the academy were extremely limited.

The new Forum addressed these concerns through the establishment of a central campus hub. The new building joins two existing structures on six different levels. It contains an auditorium, a library, various multi-function rooms, a student lounge, and a café. The building stands as a single volume, articulated through the integration of various points of entry at multiple levels; with spaces at the ground level defined by transparent partitions.

The 1,000-square-metre facility consists of three superimposed levels that extend differently into the auditorium. The ground floor is in direct relationship to the street and the public realm. A generous, albeit dark and compressed foyer leads to the surprisingly light-filled auditorium.

The main space opens directly to a terrace at the street level and connects the existing classroom building to the lower level with a ramp and a broad staircase. The library and study rooms abut the existing classroom building, the mechanical room below the Mensa, and an outdoor reading garden. The west entrance provides a split-level connection to the auditorium below; and to the café, lounge, and internet stations above.


Design idea and formal qualities

The framing structure of the building is a three-axis lacunar concrete slab supported by three rotationally-cast concrete columns. The slab is articulated through a variety of cycloidal coffers, some of which accommodate transparent skylights. The coffering reduces the actual weight of the supporting structure while demonstrating the physical depth of the construction. The skylights ventilate the space, provide acoustic absorption, and contain integrated lighting to illuminate the space by day and night.

A battery of slender, tapered steel columns integral to the curtain wall facade transfer the remainder of the roof loads. A metre-wide glazed roof along the perimeter between the new and existing buildings lends a lightness to the room that contrasts the massive character of the materials used in construction. The resulting play of light and shadow – of the monolithic and the immaterial, strikes a balance between the construction of a modern solitaire and the formation of a distinctive local building ensemble.



Socio-cultural qualities

The Forum is a flexible building that permits a variety of uses. The main space is designed to accommodate occasional formal gatherings. For the opening ceremonies, the "Catwalk"- a wide bridge with illuminated glass flooring that is normally used as the main entrance to the building, became an impromptu stage for the school's 'Big Band'. A terrazzo ramp running along the edge of the auditorium ensures accessibility for the disabled, and is large enough to facilitate the transport of a piano to the upper level of the main space.

The Forum provides places to see and to be seen. The reading tables in the library overlook the multi-function rooms, and permit an unobstructed view of the space above and beyond. The corridor in the library provides a visual connection to the study room, the conference rooms, and to the catwalk above.

The ceiling below the so-called "Autobahn Bridge" connecting the Forum with the existing classroom building echoes the character of an American movie marquis. This element marks the entrance to the library. The cylindrical column adjacent to the library entrance is deliberately over-dimensioned, creating a conspicuous information column where advertisements and notices may be posted.

Material transformation, sustainability and technical accommodation

The entire enclosure is rendered in CEM-III concrete. The fly-ash content of this material presents a lighter appearance than that of standard concrete mixtures. To exhibit the beauty, economy, and character of this raw material, a large portion of the building remains as an exposed concrete construction.

The exterior cladding at ground level is a mill-finished aluminium rain-screen facade. The horizontal cassette establishes a plinth that contrasts markedly with the transparency and verticality of the upper-storey fixed glazing. Standard aluminium curtain wall profiles were polished to lend the entire building an elegant character. Exterior sun screening is hidden behind spandrel glass panels, which are articulated in order to correspond with the depth of the roof slab beyond.

White terrazzo flooring is used throughout the building. The three rotationally-cast columns support the roof and enclose the rainwater drainage of the building are bush-hammered to expose the various textures of the aggregate and matrix of the concrete. Standard walk-off mats are used at the main entrances, laid to give the impression of generous carpets. Modular acoustic panels absorb sound, add colour, and bring a subtle material contrast to the spaces.

The entire ground floor slab is insulated from below. In-floor heating pipes are installed between the layers of reinforcing bars, allowing the mass of the concrete to be used for thermal mass activation. The building takes advantage of natural cross-ventilation, enabled through large fields of operable glass louvres. Additional ventilation is provided by operable skylights in the main roof slab. Stainless steel micro-louvres integrated into the curtain wall are used for exterior sun-control.

Twenty double-focus Metal-Halide lamps illuminate the entire floor area of the auditorium. Task-specific lighting is provided by a combination high-output fluorescent and LED sources.

from  dezeen