impromptu arquitectos + selahattin tuysuz architects : proposal for cycling bridge lisbon
portugese firm impromptu arquitectos together with international firm selahattin tuysuz architects have sent us in images of their proposal for a cycling bridge in lisbon.
the design intends to be an iconic landmark flying delicately over the busy road of ‘2ยช circular’. based in the shape of number ‘eight’, with an unsymmetrical arrangement, it combines in a single and continuous object the three main components of the bridge: the deck, the two access ramps and a suspension arch. the bridge geometry generates a dynamic visual experience, since it offers a rich diversity of forms varying according from where it is approach, both for the pedestrians and cyclists as well as the drivers passing under.
the bridge is structurally based on a deck supported by an arch. besides the forces from the structural behavior in the vertical plan, the geometry of the bridge induces torsions and biaxial bending in the section. due to the type of efforts (biaxial bending with torsion) it is foreseen in the arch a steel box section and in the deck a similar box section with the top flange constituted by a composite floor-slab providing the basis for the pavement.
the selection of bridge materials is based on durability and low maintenance. the structure is made out of steel and over the bridge deck it is used a layer of slurry pavement, that should be identical to the cycle paths, in order to emphasize the continuity of the paths through the bridge. the parapets are made of thin stainless steel extruded profiles, spaced with 170mm and capped by a stainless steel top rail.
the design comprises a sustainable lighting system. it is used light sources of low energy consumption, such as LED’s, o produce a diffuse and uniform light on the underside of the bridge deck and arch, in order to emphasize its geometry, without causing light pollution or dazzling the road users. for the pedestrian route, the lighting will be punctual and in accordance with the parapets creating a guideline for its users. the lighting scheme is powered by a photovoltaic system integrated in the upper surface of the arch, with a south orientation.
This entry was posted on Tuesday, October 13th, 2009 at 9:58 am and is filed under Engineering, Landscape Architecture, Transport, Urban Design. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.
