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Started By
Message
1
Posted on 11/5/23 at 8:00 pm to OGhunter777
Just months ago it was hit in the same area
Posted on 11/5/23 at 8:20 pm to LSU Grad Alabama Fan
quote:
What's the computer game where you build bridges with the least amount of pieces and see if a heavy truck can drive over it?
"You have died of blunt force trauma."
Posted on 11/5/23 at 8:37 pm to Tarps99
It's fine. Ends are in tact. Will just be monitored for overloads. They are overbuilt.
Posted on 11/5/23 at 8:56 pm to Tarps99
quote:Y’all might be kinfolk, you don’t “drive” a boat dummy.
Also, genius driving the boat also struck a medical building’s awning on the Intracoastal when backing up.
Posted on 11/5/23 at 9:21 pm to Tarps99
Posted on 11/5/23 at 9:41 pm to lsubuddy
quote:
Just months ago it was hit in the same area
I don’t understand how this happens. You know the route, your load height and bridge clearances, pretty simple to figure out if it’s a go or no go.
Posted on 11/5/23 at 9:47 pm to urinetrouble
quote:
OP - Where did you get that photo from?
I took the photo Saturday morning.
I did cross the bridge tonight. DOTD did leave some road closed signs on the shoulder on the top to deter someone from stopping on the shoulder up there.
quote:
Just months ago it was hit in the same area
Well a quick Google street view, just showed me that the bend has been there since at least May of 2022. The previous street view jumps to 2019 when it was not bent. A google search then turned up that it was hit in March of 2022 and DOTD closed one lane for 2 days and the reopened the lane 2 days later. So the damage is nearly 2 years old. I wonder if DOTD will fix it or just collect a check.
This post was edited on 11/5/23 at 10:02 pm
Posted on 11/5/23 at 10:32 pm to tigerbutt
quote:
Still way safer than the Lake Charles bridge
That, and the old sunshine skyway when they were building the new one adjacent are/were scary. The old skyway was handling 2 way traffic on the surviving side. I don’t as a kid and we were down there for a week and had to cross it coming and going every day.
Posted on 11/5/23 at 10:34 pm to Tarps99
It’s probably the final result of whatever heat straightening fix they did in 2022.
Posted on 11/6/23 at 6:35 am to poochie
quote:
Additionally, the Houma tunnel is reported to be under water
At least that’s what my daddy told me 5000 times in the 89s
Posted on 11/6/23 at 6:58 am to Tarps99
quote:
genius driving the boat
should pay for the repairs
Posted on 11/6/23 at 7:04 am to Tarps99
There was another movie called A Gathering of Old Men that had a scene were they jumped that bridge with a dump truck.
Fun fact, until the parades moved to the Westside of Houma, the Houma Parades use to cross that bridge to get to the Westside.
Fun fact, until the parades moved to the Westside of Houma, the Houma Parades use to cross that bridge to get to the Westside.
Posted on 11/6/23 at 11:27 am to Tarps99
15-year bridge engineer with a master's in structural engineering here.
All structures are designed for redundancy. This bridge has 5 beams, so it won't come down if that bent beam were to fail. Redundancy is required by code, so that's not an overdesign.
All structures are designed with resistance and load factors. Resistance factors reduce calculated capacity; load factors reduce calculated loads. Main loads are dead load (weight of the structure) and live loads. Dead and live are factored up 25% and 75%, respectively.
That beam is seeing compression at the top; tension at the bottom. While it doesn't look great, the tension condition at the bottom is what you want. Steel beams buckle in compression; not tension.
If I were assessing the safe load carrying capacity, I would use a reduced resistance factor (by code) and account for any damage/loss of section. It wouldn't not surprise me for it to come back as safe for traffic.
Yes, concrete is a completely different animal. As soon as it is cracked/fractured, it's done.
All structures are designed for redundancy. This bridge has 5 beams, so it won't come down if that bent beam were to fail. Redundancy is required by code, so that's not an overdesign.
All structures are designed with resistance and load factors. Resistance factors reduce calculated capacity; load factors reduce calculated loads. Main loads are dead load (weight of the structure) and live loads. Dead and live are factored up 25% and 75%, respectively.
That beam is seeing compression at the top; tension at the bottom. While it doesn't look great, the tension condition at the bottom is what you want. Steel beams buckle in compression; not tension.
If I were assessing the safe load carrying capacity, I would use a reduced resistance factor (by code) and account for any damage/loss of section. It wouldn't not surprise me for it to come back as safe for traffic.
Yes, concrete is a completely different animal. As soon as it is cracked/fractured, it's done.
Posted on 11/6/23 at 11:29 am to Tarps99
quote:
After initially closing the bridge for inspection, LaDOTD came back and said it was safe to drive over.
If that picture is the bridge in question...damn. That's pretty bent.
This post was edited on 11/6/23 at 11:30 am
Posted on 11/6/23 at 12:09 pm to member12
quote:
If that picture is the bridge in question...damn. That's pretty bent.
And if you saw my updated post last night, come to find out it has been bent since 2022.
A engineer commented this morning about the bridge having redundancies since there are 5 beams.
I wonder if instead of using metal beams, they had used concrete beams, if it would it have still been safe. If memory serves me right, one of the I-10 bridges at the I-49 interchange was hit hard and caused some traffic nightmares. I don’t remember if it was a complete closure or if it was lane closures after the assessment. I know DOTD had to work over time fixing that one.
Posted on 11/6/23 at 12:15 pm to Tarps99
quote:
beams, they had used concrete beams, if it would it have still been safe
No. Tension strands would likely be severed. Traffic would be likely one side with other side closed.
This post was edited on 11/6/23 at 12:17 pm
Posted on 11/6/23 at 12:18 pm to DakIsNoLB
Are those girders 36ksi and does the before mentioned "heat it and bend back" reduce the strength?
I ask just in general terms, I know there are things that could be done to strengthen after bending but I'm curious if the heat treatment in of itself would weaken the beam from it's original design strength.
I ask just in general terms, I know there are things that could be done to strengthen after bending but I'm curious if the heat treatment in of itself would weaken the beam from it's original design strength.
Posted on 11/6/23 at 12:35 pm to Hu_Flung_Pu
quote:
No. Tension strands would likely be severed. Traffic would be likely one side with other side closed.
Depends on the extent of the damage to both the concrete and the reinforcement/strands. If only a few get cut, it can still hold up. Still, damaged concrete worries me more than damaged steel. You can see the extent of the damage to steel, and you have options for heat-straightening, welding, and bolting type fixes. Concrete, not so much.
Posted on 11/6/23 at 12:36 pm to Tarps99
quote:
I wonder if instead of using metal beams, they had used concrete beams, if it would it have still been safe. If memory serves me right, one of the I-10 bridges at the I-49 interchange was hit hard and caused some traffic nightmares. I don’t remember if it was a complete closure or if it was lane closures after the assessment. I know DOTD had to work over time fixing that one.
Concrete damage is much more difficult to fix.
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