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Federal investigators, including NTSB’s Adrienne Lamm, an NTSB materials engineer in the Materials Laboratory Division of the Office of Research and Engineering, examine the debris from Thursday’s collapse of a bridge on FIU’s campus. The NTSB’s Go Team began arriving on scene at 10 p.m. Thursday and has been working around the clock to gather information and evidence in its investigation of the accident.
media credits (ID:293124)
Pedestrian Bridge Collapse Over SW 8th Street HWY18MH009 : This animation depicts the sequence of events leading to the collapse of the reinforced concrete pedestrian bridge over SW 8th Street just north of Florida International University in Miami, Florida at March 15, 2018. The animation begins with an overall area view showing the location of the pedestrian bridge relative to the center of the city of Miami, Florida. A satellite picture shows where the pedestrian bridge was to be located on the west side of the intersection of SW 8th Street and 109th Avenue. The bridge was intended to connect Florida International University with the City of Sweetwater by extending over SW 8th Street and the parallel running Tamiami Canal. The first section of the bridge that was built was the section over SW 8th Street, and that is the section that collapsed. Security video shows the construction site where the bridge section was built on the ground adjacent to the roadway. The bridge section was moved from the construction location onto its support piers using two self-propelled modular transporters. An artist’s rendition of the overall conceptual design, and a photo of the constructed bridge section as placed on the piers are used to display elements of the bridge structure, including the deck, the single row of non-redundant truss elements, and the canopy. Truss elements were numbered 1 through 12 beginning from the south. The 174-foot length and 950-ton weight of the bridge section over SW 8th Street are indicated. A three-dimensional computer model of the bridge section is used to describe the pouring of the concrete in three stages: first the deck, then the truss members, and finally the canopy. The model is also used to show the locations of cold joints between elements, and to show the steel reinforcing bars and larger diameter steel post-tensioning rods within the concrete. The model is also used to explain that truss members 2 and 11 were post-tensioned to counteract the tensile forces developed while the ends of the bridge hung over the transporters when the span was moved. Truss members 2 and 11 were de-tensioned after the bridge section was placed on the piers. A series of photographs show growing cracks in the structure at and adjacent to the cold joint between the deck and the bottom ends of truss members 11 and 12 (the north end of the bridge section). The photographs show increasing damage accumulating over the five days the bridge was in place, from March 10, 2018 through March 15, 2018.A photograph from March 15, 2018 shows workers on top of the bridge to re-tension member 11 in an effort to stop the cracking. The collapse of the bridge is shown in a video captured by a dashboard-mounted camera from a truck driving on SW 8th Street. The animation ends with a picture of the collapsed bridge, with inset photographs showing closer views of truss members 11 and 12, the canopy, and the north or pylon pier where the collapse initiated.
media credits (ID:433704)
FIU Bridge Being built : A pedestrian bridge near Florida International University collapsed on Thursday killing multiple people authorities said. You can see a timelapse of the bridge's construction here.
media credits (ID:368975)
Time lapse of FIU bridge installation : Views from road and from a camera the bridge during the move on March 10, 2018.
media credits (ID:368976)
FIU-Sweetwater Bridge Move - Full Time-Lapse : Un-edited version of the move of a 950-Ton 174-foot long pedestrian bridge the morning of Saturday, March 10, 2018. Designed by Figg Bridge Engineers, Constructed by MCM USA and Moved by Barnhart Crane & Rigging. Funded by USDOT/FHWA TIGER and FDOT TAP grants. The project has already generated very significant private sector development in Sweetwater. Shot on a GoPro Hero 4 Black at one 4K frame every 2 seconds (+60 X speed) with a TurnsPro rotating camera mount set to turn 75 degrees in 5 hours. Music is "Passing Time" by Kevin MacLeod from the TouTube Library.
media credits (ID:368977)
Time Lapse FIU-Sweetwater Bridge for February 2018 - Stripping Forms, Post-Tensioning : PG6 Camera Time Lapse FIU-Sweetwater Bridge for February 2018 - Stripping Forms - PG6 Feb 2018 1800X 1080P with Music *Post-tensioning activities can be seen occurring over several days on the canopy in the second half of the video* Bridge design is by Figg Bridge Engineers and it is being built by MCM. Music is "Grasshopper" by Quincas Moreira from the YouTube Audio Library
media credits (ID:368978)

General Information

Other name(s): FIU 8th Street Pedestrian Bridge; UniversityCity Bridge
Beginning of works: March 2016
Completion: December 2018
Status: collapsed (15 March 2018)

Project Type

Structure: Covered bridge
Axial (single) truss bridge
Support conditions:
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Function / usage: Pedestrian bridge (footbridge)
Material: Prestressed concrete bridge
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Location

Location: , , ,
Coordinates: 25° 45' 40.31" N    80° 22' 22.36" W
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Technical Information

Dimensions

main span 53 m
total length 98 m
number of spans 2
pier number 1
pylon height 33 m
number 1

Cost

cost of construction United States dollar 14 200 000

Materials

pylon reinforced concrete
deck prestressed concrete
piers reinforced concrete
truss prestressed concrete

Chronology

10 March 2018

The primary bridge structure is moved from the assembly site parallel to the road to its final position across SW 8th Street
15 March 2018

For yet unknown reasons, the still unfinished bridge collapses onto SW 8th Street on top of several vehicles. Several people are injured or killed.

Participants

Design
Structural engineering
Contractor

Relevant Web Sites

Relevant Publications

  • About this
    data sheet
  • Structure-ID
    20074877
  • Published on:
    15/03/2018
  • Last updated on:
    29/09/2023
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