Lateral stabilising cables
Suspension bridges often lack any horizontal stays - a fact
that makes them prone to twisting oscillations.
In order to resist these, the roadway is often attached to
a large truss structure - to make it stiff and rigid - and
not prone to oscillating.
A horizontal stabilising network would be an alternative to
following that sort of strategy.
This principle has in fact been applied fairly extensively
by those constructing suspension bridges carrying pipes.
Those carrying water over aqueducts face a constraint not
present when constructing road bridges - many types of
aqueducts must remain close to the horizontal -
and a classical suspension bridge necessarily bulges upwards
in the middle.
Pipeline suspension bridge 1 [1]
|
Pipeline suspension bridge 2 [1]
|
Pipeline suspension bridge 3 [1]
|
Grand Tower Pipeline Bridge [1]
|
The design is suitable for use in constructing aqueducts.
Aqueduct builders face a constraint not present when
constructing road bridges - many types of aqueducts
must remain close to the horizontal.
Although classical suspension bridges arch upwards in the
middle, this bulge can be compensated for by a cable network
that pulls downwards - resulting in a horizontal passage which
is suitable for carrying water in an open channel.
For some reason these forms of horizontal stabilization
appear to have been neglected by those constructing road
bridges.
These either lack horizontal linear stability entirely - or
rely on getting it from the stiffness of their roads.
The hanging bridge of Tanise provides about the only working
bridge built using the idea which is suitable for carrying
people:
Hanging bridge of Tanise [1 2]
|
Horizontal stabilization and domes
Tensile suspension domes are likely to have a number of
near-horizontal cables - in order to support their skins.
These cables are also likely to protect the suspended
structures against lateral movement.
Links
Grand Tower Pipeline Bridge
Pipe bridge
Natural Gas Pipeline Bridge
Grand Tower Pipeline Suspension Bridge
Pipe bridge, Tanana River, Big Delta, Alaska
Pipe bridge, Tanana River, Big Delta, Alaska
Pipe bridge, Big Horn River, Eccles
Pipe bridge, Green River, Flaming Gorge National Recreation Area, Wyoming, USA
Pipe bridge, Atchafalaya River, Krotz Springs, Louisiana, USA
Pipe bridge, Atchafalaya River, Melville, Louisiana, USA
Pipe bridge, Peace River, Taylor, British Columbia, Canada
Pipe bridge, Pueblo Canyon, Los Alamos, New Mexico, USA
Pipe bridge, Soledad Canyon, Canyon Country, California, USA
Pipe bridge, Black River, Watertown, New York, USA
Pipe bridge, Wax Lake Outlet, Calumet vicinity, Louisiana, USA
Pipe bridge, Wax Lake Outlet, Calumet vicinity, Louisiana, USA
Pipe bridge, Whisky Bay Pilot Channel, Whisky Bay, Henderson vicinity, Louisiana, USA
|
