Heinz Isler

Heinz Isler ( born July 26, 1926 in Zollikon, † June 20, 2009 in Bern ) was a Swiss civil engineer. With over 1400 planned and realized shell structures he is considered the world's most important shell builders. Together with Robert Maillart, Othmar Ammann and Christian Menn he is considered one of the most important Swiss civil engineers of the 20th century.

Life

After visiting the Canton High School in Zurich Isler began in 1945 to study civil engineering at the ETH Zurich, where he graduated in 1950 with a diploma. He then worked for three years as an assistant at the ETH Zurich under Professor Pierre Lardy build the model workshop of the static chair. There followed for nine months studying art painting at the School of Applied Arts Zurich, before he in Burgdorf began in 1954 as an independent engineer with the design of shells.

Due to natural observations and mathematical definitions Isler not developed the optimum shapes of thin-walled sides curved shells of reinforced concrete, are used as roofing. For example, resulted from hanging towels, stiffened and reverses the geometry of shell roofs with free form, as the average sizes have only compressive forces under its own weight. From the inflated membrane, the floor plans of 54 meters × emerged hump shells, 58 meters with 15 to 19 cm thick reinforced concrete shells span. With these methods, designed and constructed over 1400 Isler shell structures. On models he usually showed the sufficient stability. He also referred to the construction schedule fixed, supervised the construction and watched for years the structural behavior of shells. The shell forms predominantly exhibit compressive stresses and thus have a virtually without cracks, why was usually omitted coatings.

Isler was part of the team of Behnisch & Partner, with a tent roof design won the competition for the Olympic Stadium in Munich in 1967. Also at the realization he was involved. He worked with mainly due to the massive stadium round.

Structures

Inter alia

  • The free-form shell of the exhibition building of the Wyss seeds and plants in Zuchwil, Canton Solothurn, from 1962, was the first major shell Islers. The construction is four -point mountings and spans with horizontal dimensions of 25 × 25 meters an area of ​​650 square meters. The 7 -inch-thick shell has on each side stiffening cantilever beams that are 6 inches thick. In 2007, the concrete shell was placed under cantonal conservation.
  • In 1965, the roof shell for the company Kilcher came to perform in Recherswil. The vierpunktgestütze shell with free edges has dimensions of 25 × 25 meters.
  • The two triangular shell wings over the roadhouse Deitingen -south on the A1 motorway emerged in 1968. They were developed from the suspension principle and have 31.60 meters with a maximum height of 11.5 meters, each measuring 26 × on.
  • The roofing of the nature theater Grötzingen consists of a shell, which is supported on five points. The dish was built in 1977. It points at a thickness of 9 to 12 inches dimensions of 28 × 42 meters and covered an area of ​​600 square meters.
  • The Tennis Hall of Grenchen in 1978 with four adjacent shells, each measuring 47 meters long and 17.3 meters wide. In 1993 the hall was extended by two shells.
  • The free-form shell of the swimming pool in Brugg, created in 1981 from the suspension principle. It is supported at four corners and has dimensions of 35 × 35 meters on.
  • The roof of the Fliegermuseum Dübendorf consists of four adjacent shells, each measuring 51.7 meters long and 18.7 meters wide.
  • (Acquired in 1987 by Truffaut ) A series of pentagonal free-form shells for the garden center chain Les Florélites Clause around Paris.
  • The concrete shell sculpture with light slots in the stone church was built Cazis 1996/1997 with the participation Islers to a design by architect Werner Schmidt.

Honors

In 1983, Heinz Isler had received at the request of the Department of Civil Engineering honorary doctorate from ETH Zurich and in the same year, an honorary professor at the Faculty of Architecture of the University of Karlsruhe. Isler was an honorary member of the International Association for Shell Structures ( IASS ) at its founding congress in 1959, he gave a lecture on his first international shell structures.

Burgdorf, Switzerland Membrane structure Structurae Integrated Authority File
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