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| Street View, Sep 2021 |
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| Street View, Sep 2017 |
Tanweer Malik posted four photos with the comment:
Mimico Creek pedestrian bridge in Toronto. It’s a single rib inclined arch bridge – an unusual type of design created by eminent Spanish engineer and architect Santiago Calatrava.It’s very confusing if you try to figure out the load path in this structure. Perhaps here, arts and aesthetics took priority over simplicity and efficiency of structural engineering of bridges.
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| Luis Sánchez commented on the above post Alameda Bridge (Valencia, Spain). My city. [More comments indicate that it is also designed y Calatrava.] |
Back to the Mimico Creek Bridge.
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| acotoronto, courtesy of Bob Krawczyk Year Completed: 1998 |
To keep the bridge within the budget of $650k, wetlands were added to reduce the creek from 90m (295') to 44m (144'). [CanadianConsultingEngineer]
The deck support being asymmetrical is expected since the bridge support is asymmetrical. And it is thin because the arch helps support it. But the deck being a truss caught my eye. I presume it is a truss to resist the lateral forces introduced by the slant of the arch.
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| 4th of 8 photos via calatrava "The main elements of the steel superstructure are a 600 millimeter diameter torsion tube, a 200 millimeter diameter edge tube and a 200 millimeter diameter arch tube. These structural steel elements are connected by means of floor beams, bracing members and struts, using a combination of welded and bolted connections." |
Humber Bay Arch Bridge
Several articles about the Mimico Creek Bridge mentioned how the city wanted the bridge to have some pizazz like the awards winning Humber Bay Arch Bridge, but without the expense. So I checked out that bridge as well.
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| Street View, May 2019 |
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| Drone View, Nov 2021 |
The trail for which it was designed has separate bike and pedestrian lanes.
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| Trail View, Jul 2017 |
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| Trail View, Jul 2017 |
"Completed in the mid-1990s, the bridge is part of the Martin Goodman Trail and is 139 metres (456 ft) in length, with a clear span of 100 metres (330 ft) over the mouth of the Humber River to protect the environmental integrity of the waterway." [LocalesDesign]
"Completed in 1994 the Humber Bay Arch Bridge is 139 meters long, with a width of 6.50 meters and cost a total of $4,050,000 to build. This bridge is also known as the Gateway Bridge/ Humber Bay Pedestrian Bridge as this is the best way to cross the city if not in a car." [FirstStoryBlog]
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| MontgomerySisam [This sources specifies a completion date of 1996.] As with many tied-arch bridges, the arch was built off site and then floated into place. "Many of the design features were inspired by the site’s indigenous history. The arch and concrete abutments on either side of the bridge mark the gateway to a historic aboriginal trading route. The steel superstructure connecting the two ribs of the tied arch is patterned as an abstract version of the Thunderbird, an aboriginal icon of the Ojibway who occupied the site for almost two hundred years. References to the natural and local history of the area are also integrated into the design, including snake and turtle motifs." The arches are parabolically curved. |
This source also specifies a completion date of 1994. So that is 2 votes to 1, so I used 1994 in the title. There are 44 stainless steel hangers.
"Love Locks" used to be a problem for this bridge.
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| Trip |
So they built a structure in the Distillery District for Love Locks. Judging by the above street views of the Humber Bay Bridge, they now keep them off of the bridge.
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| TheStar, Colin McConnell / Toronto Star Erected in July 2014. |
It didn't take long for it to fill up.
And this batch must be from 2016 because all of the locks evidently got cut off in 2016. [reddit]
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| Street View, May 2017 |
A comment claimed that these bridges are in Toronto, ON. I spent some time looking for it on a satellite map. I think I've been punked. I did learn that Toronto does have some interesting topology. I did find this "triple bridge," but that is not these arch bridges.
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| Highway Engineering Discoveries posted Three Different Period Bridges Seen Together, Witness History Changed. |
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