Frei Otto Munich Stadium

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MUNICH OLYMPIC STADIUM//FREI OTTO//1972
gizem akgun/ nuria juanbaro sarret/kanaka raghavan _ADDA 2012-2013

GERMAN PAVILION// MONTREAL//1967//cable nets

TUWAIQ PALACE//SAUDI ARABIA//1970// cable nets

OLYMPIC STADIUM//MUNICH//1972// cable nets

ORKS

MULTIHALLE MANNHIEM //GERMANY//1975// grid shells

JAPAN PAVILION EXPO 2000//HANOVER GERMANY//2000//grid shell

German architect and research engineer 1957 // Development Center for Lightweight Construc on in Berlin. 1964// Ins tute for Lightweight Structures in Stu gart. Exhibited a special gi for crea ng lightweight tent structures Computer-based procedure for determining their shape and behaviour Alterna ve system of grid shell structures

HE ARCHITECT /FREI OTTO

HE LIGHTWEIGHT PRINCIPLE/tensile

Tensile roofs/ every part of the structure is loaded in tension with no requirement to resist compression Cable nets/ grid of structural cables in tension forming the framework supports a weather shield. An clas c Surfaces/ tension forces are in equilibrium, the centres of curvature are in opposite side of the membrane Synclas c Surfaces/ the centres of curvature are on the same side of the membrane

an clas c curve

hyper paraboloid

hyper paraboloid/ minimum 4 pts with alteast 1 pt out of plane

Less material and effort Remarkably large spans Combined tensile structure and biological research Only a few members,are under compression while all others, for instance, cables and membranes, are under tension For tension and rigidity, an clas c or saddle-like curvatures

HE LIGHTWEIGHT PRINCIPLE

UNICH OLYMPIC STADIUM /details

SITE// Originally the se ng of a 1930’s airfield,former training ground for the Bavarian Royal Army and the site of Munich’s first civil airport. Ground had been used as a dump yard for ruined buildings’ rubble. 300m tall broadcast tower, s ll present today, a major landmark of the site. PROGRAM// 80,000 seats Smaller enclosed sports hall Swimming hall Warm-up arena Enclosed workout facility Housing for 3000 people

UNICH OLYMPIC STADIUM /1972

Gunter Behnisch proposed light and open structures con nuous fluid tent roofing resembling natural hills Frei O o’s Montreal Pavilion was the guiding piece The original system came from model studies where ladies stockings were used to simulate the tent’s surfaces

al proposal

CRITICAL STUDIES// Mast heights gave ghter curvature near the masts and leave the unsa sfactory flat perimeter areas unimproved Increasing the pre-stress to flat areas would provide the necessary stability, but only at impossibly high levels of tensioning

UNICH OLYMPIC STADIUM/ini

Winner of the compe on for 1972 olympic park by GÜNTER BEHNISCH

ERMAN PAVILLION,MONTREAL/1967

Real masterpiece of lightweight architecture,Frei O l/Behnisch Ini al mode o

UNICH OLYMPIC STADIUM /comparisons

UNICH OLYMPIC STADIUM /inspira

Dragonfly wings are one three-thousandth of a millimeter thick Up to 1,000 sec ons Compartmental structure, wings do not tear, withstand the pressure that forms during flight. Driving principle for design of roof

on

7 saddle-shape cable nets

Square meshes that form rhomboids to assume an clas c curvature

UNICH OLYMPIC STADIUM /revised roof

Subdivide roof into a patchwork of separate but coupled smaller canopies Support at many points and mostly curved to suitably ght radii. Nets do not extend to the tops of medium height masts, instead hung from very tall masts Masts placed outside the roof or suspended above ground on cables keeping the areas below column-free

Roofing for the main sports facili es

UNICH OLYMPIC STADIUM /experiments

1:125 scale models exactly proportional both in geometry and in elasticity to the envisaged full sized structures

UNICH OLYMPIC STADIUM /structure

Interior cables Peripheral cables Cable joints Steel masts Concrete underground founda on Acrylic panel cover

UNICH OLYMPIC STADIUM /cables

Interior cables//11.7...
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