Schlaich’s Use of Cable-stays By Avery Choi & Shaun Lee

JORG SCHLAICH Born in 1934, Stuttgart, Germany Studied Architecture and Structural Engineering Worked for Leonhardt Setup own firm: Schlaich Bergermann and Partners

Definition of Cable-Stayed Structures A cable-stayed structure is one that employs cables to transfer its loads to the supports. Cable-stayed structures must have: Pylons Diagonal cable-stays

Cable-Stay Configurations Radial Configuration VS Parallel Configuration

Why use Cable-Stays? Why not? Versatile Low construction costs Light and elegant Why not? Susceptible to wind forces Complex computer analysis required 2.00

Schmehausen Cable-net Cooling Tower Social: Architects and Engineers loved it Symbol: Landmark structural engineering in Denmark Scientific: Combined the use of cable-stays with cable nets 4.00 Social: Was aesthetically pleasing to both architects and engineers and the general public Symbol: Revolutionalized a new design in dry cooling towers (introduced cable nets instead of reinforced concrete) Scientific: Schlaich used his knowledge of Cable-stays to support the cable-net design

Pedestrian Bridge in Horn Kiel, Germany

Pedestrian Bridge in Hörn, City of Kiel – ONLY foldable bridge Built – 1997 Pylons – steel Deck – steel Main span – 25.5 m Deck width – 5 m A completely new district - Kai-City Kiel - is going up in the heart of the city, opposite the main railway station. This project was also Kiel's contribution to EXPO 2000. Here, the state capital is opening itself again to the water. The bridge for bicycles and pedestrians link the new district with the east and west shores.

Kai-City - Major companies from the e-business sector have decided to locate here. They will also be joined by the Multimedia Campus, a concentration of experts from the university, commerce, state and city for this high-tech sector. Several hundred homes and well over 1,000 jobs literally mean living and working on the water's edge. Train station, shopping mall, floating chinese restaurant

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2nd Hooghly River bridge Location = Calcutta, India Deck width = 35m or 6 Vehicle lanes Spans total of 821m = 182 – 457 – 182m Towers = 135m high Material = steel with concrete cladding

With calculations = 830

“If I am proud of anything and happy above that, then it is this bridge!” By Jorg Schlaich

Santiago Calatrava

The design ultimately was built as a single bridge, along with the Cartuja Viaduct.  Though it no longer had the same impact as a lone structure, the inclined mast was kept as inititally designed.  The extraordinary weight of the concrete-filled steel mast, which angles away from the roadbed at 58º, is enough to support the deck without the need for counter-stay cables or support piers.  This was a first in bridge design, and creates a stunning display. Length: 820 ft (249.9 m) Max. Span: 656 ft (199.9 m) Mast Height: 466 ft (142.0 m)

The Trinity Footbridge was the first gesture of the development of the Chapel Wharf area of Salford, England.  The bridge links the two cities of Salford and Manchester, and is meant solely for pedestrian traffic. One of the most striking features of the bridge is the 60° angled mast, which holds the support cables.  This feature required great skill both to design and build, as the precisely angled cables had to be welded in place before the mast was fully assembled. Length: 257.5 ft (78.5 m) Max. Span: 177.2 ft (54.0 m) Vertical Height: 134.5 ft (41.0 m) The architect – Calatrava: small-scaled design, focuses on aethetics and visual effects The engineer – Schlaich: large-scaled projects, form follows function

The Caballeros Footbridge Project was an entry in a competition held by the city-fathers of Lerida, Spain.  Though never built, this bridge was meant to be an extension to the Calle des Caballeros, connecting an older urban area with a natural area on the far side of the river.   Length: 689 ft (210.0 m) Max. Span: 459 ft (139.9 m) Pylon Height: 92 ft (28.0 m)

The Caballeros Footbridge Project was an entry in a competition held by the city-fathers of Lerida, Spain.  Though never built, this bridge was meant to be an extension to the Calle des Caballeros, connecting an older urban area with a natural area on the far side of the river.   Length: 689 ft (210.0 m) Max. Span: 459 ft (139.9 m) Pylon Height: 92 ft (28.0 m)

Conclusion Cable-Stays can be used for a variety of purposes and design constraints Schlaich’s cable-stayed structures are: Efficient – Hooghly river bridge Economical – Cooling plant Elegant – Folding bridge 1000 Folding bridge = efficient Economical =