The Five Points of a New Architecture in Earthquake Zones - - PowerPoint PPT Presentation

the five points of a new architecture in earthquake zones
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The Five Points of a New Architecture in Earthquake Zones - - PowerPoint PPT Presentation

The Five Points of a New Architecture in Earthquake Zones Global Earthquake Model Caribbean Regional Panelist Robert V. Woodstock Programme Workshop Trinidad and Tobago, 2011 May 02-04 Configuration


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SLIDE 1

The Five Points


  • f a New Architecture


…in Earthquake Zones

  • Global Earthquake Model

Caribbean Regional Programme Workshop

Trinidad and Tobago, 2011 May 02-04

Panelist – Robert V. Woodstock

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SLIDE 2

Configuration

The most important architectural d e c i s i o n s t h a t a ff e c t s e i s m i c performance are the critical decisions that create the buildingʼs configuration i.e. its size and shape.

  • Simple symmetrical plans and forms are

r e c o m m e n d e d o v e r c o m p l e x asymmetrical ones.

  • “A square plan provides for a near

perfectly balanced system”

  • Christopher Arnold, “Seismic Issues in Architectural

Design, Designing for Earthquakes, A Manual for Architects”

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SLIDE 3

Influences on Seismic 
 Performance

Redrawn ¡from ¡Building ¡Configura3on ¡& ¡Seismic ¡Design, ¡Christopher ¡Arnold ¡and ¡Robert ¡Reitherman ¡

  • Scale
  • Horizontal size
  • Proportion
  • Symmetry
  • Distribution and Concentration
  • Structural Plan Density
  • Corners
  • Perimeter Resistance
  • Redundancy
  • ­‑ ¡Christopher ¡Arnold ¡and ¡Robert ¡Reitherman

“Building ¡Configura3on ¡& ¡Seismic ¡Design”

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SLIDE 4

Seismically desirable building attributes:

  • Continuous load path
  • Low height to base ratio
  • Equal floor heights
  • Symmetrical plan shape
  • Identical resistance on both axes
  • Identical vertical resistance
  • Uniform section and elevation
  • Seismic resistance elements at

perimeter

  • Short spans
  • No cantilevers
  • No openings in diaphragms (floors

and roof)

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SLIDE 5

Historical Precedents:

The Parthenon

Golden ¡Sec3on/Eleva3on ¡redrawn ¡from ¡“Architecture:Form.Space ¡& ¡Order” ¡– ¡Francis ¡Ching ¡ Photo ¡credit: ¡Google ¡

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SLIDE 6

Historical Precedents:

  • The Pantheon
  • Plan ¡redrawn ¡from ¡“Architecture:Form.Space ¡& ¡Order” ¡– ¡Francis ¡Ching ¡

Photo ¡credit: ¡David ¡Mixer.com ¡

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SLIDE 7
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SLIDE 8

The Domino System 1914-15

Redrawn ¡from ¡Le ¡Corbusier: ¡Oeuvre ¡Complete, ¡Willy ¡Boesiger ¡ ¡

The Domino skeleton consisted of six thin concrete columns that simply carried two horizontal slabs as the floors and another as the roof. The columns a n d s l a b s w e r e c o n n e c t e d b y a

  • staircase. Apart from

this nothing else was fixed, thus permitting a great flexibility.

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SLIDE 9

LeCorbusierʼs Five Points of a New Architecture

  • 1 - Raising the building on Pilotis
  • 2 - The Free Plan
  • 3 - The Roof Garden
  • 4 - The Free Elevation
  • 5 - The Horizontal Window
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SLIDE 10
  • 1. Raising the building on Pilotis ¡

Redrawn ¡from ¡Le ¡Corbusier: ¡Oeuvre ¡Complete, ¡Willy ¡Boesiger ¡ Photo ¡credit: ¡Valueyou, ¡Wikiepedia ¡

“The rooms are thereby removed from the dampness of the soil; they have light and air; the building plot is left to the garden, which consequently passes under the house.” ¡

  • ­‑ Le ¡Corbusier ¡Originally ¡published ¡in ¡Almabach ¡de ¡l’Achitecture ¡moderne, ¡Paris ¡1926 ¡
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SLIDE 11
  • 2. The Open or “Free” Plan

Redrawn ¡from ¡Le ¡Corbusier: ¡Oeuvre ¡Complete, ¡Willy ¡Boesiger ¡ Photo ¡credit: ¡Great ¡Buildings ¡

“The support system carries the intermediate ceilings and rises up to the roof. The interior walls may be placed wherever required, each floor being entirely independent of the rest. ”

  • Le Corbusier Originally published in Almabach de lʼAchitecture

moderne, Paris 1926

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SLIDE 12
  • 3. The Roof Garden

Redrawn ¡from ¡Le ¡Corbusier: ¡Oeuvre ¡Complete, ¡Willy ¡Boesiger ¡ Photo ¡credit: ¡Great ¡Buildings ¡

The roof gardens will display highly luxuriant vegetation. Shrubs and even small trees up to 3 or 4 metres tall can be planted.

  • In this way the roof garden will become the most favoured

place in the building. In general, roof gardens mean to a city the recovery of all the built- up area.” ¡

  • ­‑ ¡Le ¡Corbusier ¡Originally ¡published ¡in ¡Almabach ¡de ¡l’Achitecture ¡moderne, ¡Paris ¡1926 ¡
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SLIDE 13
  • 4. The Free Elevation

Redrawn ¡from ¡Le ¡Corbusier: ¡Oeuvre ¡Complete, ¡Willy ¡Boesiger ¡ Photo ¡credit: ¡Great ¡Buildings ¡

“By projecting the floor beyond the supporting pillars, like a balcony all round the building, the whole facade is extended beyond the supporting construction. It thereby loses its supportive quality and the windows may be extended to any length at will, without any direct relationship to the interior division. ¡

  • ­‑ ¡Le ¡Corbusier ¡Originally ¡published ¡in ¡Almabach ¡de ¡l’Achitecture ¡moderne, ¡Paris ¡1926 ¡
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SLIDE 14
  • 5. The Horizontal Window

Redrawn ¡from ¡Le ¡Corbusier: ¡Oeuvre ¡Complete, ¡Willy ¡Boesiger ¡ ¡ Photo ¡credit: ¡Great ¡Buildings ¡

moderne, Paris 1926

The whole history of architecture revolves exclusively around the wall apertures. Through the use of the horizontal window, reinforced concrete suddenly provides the possibility of maximum illumination.”

  • Le Corbusier Originally published in Almabach de lʼAchitecture
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SLIDE 15

Villa Savoye


Poissy, France

Photo ¡credit: ¡Valueyou, ¡Wikiepedia ¡

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SLIDE 16

Villa Savoye


Poissy, France

“It was Le Corbusierʼs Villa Savoye (1929–1931) that most succinctly summed up his five points of architecture that he had elucidated in the journal L'Esprit Nouveau and his book Vers un Architecture which he had been developing throughout the 1920s. First, Le Corbusier lifted the bulk of the structure off the ground, supporting it by pilotis – reinforced concrete stilts. These pilotis, in providing the structural support for the house, allowed him to elucidate his next two points: a free façade, meaning non-supporting walls that could be designed as the architect wished, and an open floor plan, meaning that the floor space was free to be configured into rooms without concern for supporting walls. The second floor of the Villa Savoye includes long strips of ribbon windows that allow unencumbered views of the large surrounding yard, and which constitute the fourth point of his system. The fifth point was the roof garden to compensate for the green area consumed by the building and replacing it on the roof. A ramp rising from ground level to the third floor roof terrace allows for an architectural promenade through the structure. The white tubular railing recalls the industrial "ocean-liner" aesthetic that Le Corbusier much admired. As if to put an exclamation mark after Le Corbusier's homage to modern industry, the driveway around the ground floor, with its semicircular path, measures the exact turning radius of a 1927 Citroen automobile.”

  • ­‑ ¡Villa ¡Savoye ¡and ¡the ¡Five ¡Points ¡of ¡Architecture ¡– ¡Wikipedia ¡
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SLIDE 17

Villa Savoye


Poissy, France

Ground Floor First Floor Second Floor

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SLIDE 18

The Swiss Pavilion


Paris, France ¡

  • Ministry of Education

Kingston, Jamaica ¡

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SLIDE 19

ARCHITECTURE

  • “Architecture is a thing of art, a phenomenon of the emotions,

lying outside questions of construction and beyond them. The purpose of construction is to make things hold together; of architecture TO MOVE US.”

  • “Architecture is the masterly, correct and magnificent play of

masses brought together in light; Our eyes are made to see forms in light; Light and shade reveal these forms.”

  • Le Corbusier
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SLIDE 20

Recommendations for Reducing the Problems

Use a design with the ideal configuration when:

  • The best seismic performance for the lowest cost is needed
  • The maximum predictability of seismic performance is desired
  • The most economical structural design and construction is needed, including

design and analysis for code conformance, simplicity of seismic detailing, and repetition of structural component sizes and placement conditions

  • Christopher Arnold, “Seismic Issues in Architectural Design, Designing for Earthquakes, A Manual for Architects”
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SLIDE 21

Recommendations for Reducing the Problems

With an irregular design configuration:

  • A skilled seismic engineer, who is sympathetic to the architectʼs design

intentions, should be used from the outset

  • The architect should be prepared to accept structural forms or assemblies

that may modify the design character, and should be prepared to exploit these as part of the aesthetic language of the design rather than resisting them

  • The architect and engineer should both employ ingenuity and imagination of

their respective disciplines to reduce the effect of irregularities, or to achieve desired aesthetic qualities without compromising structural integrity

  • Extreme irregularities may require extreme engineering solutions; these

may be costly, but it is likely that a building with these conditions will be unusual and important enough to justify additional costs in materials, finishes, and systems.

  • A soft or weak story should never be used; this does not mean that high

stories or varied story heights cannot be used, but rather that appropriate structural measures be taken to ensure balanced resistance.

  • Christopher Arnold, “Seismic Issues in Architectural Design, Designing for Earthquakes, A Manual for Architects”
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SLIDE 22

The Engineer and the Architect

  • “The Engineer, inspired by the law of economy and

governed by mathematical calculation, puts us in accord with universal law.

  • The Architect, by his arrangement of forms, realizes an
  • rder which is a pure creation of his spirit; by forms and

shapes he affects our senses to an acute degree and provokes plastic emotions; by the relationships which he creates he wakes profound echoes in us, he gives us the measure of an order which we feel to be in accordance with that of our world, he determines the various movements of our heart and of our understanding; it is then that we experience the sense of beauty.”a

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