Are you sure the bar was "moving?" Or were you jumping up and down too but became alarm at the movement??

6" vertical movement would not surprise me. I don't think it was a foot, but there should be some stadium video that could be analyzed.

Tarp for no fans is a shame, but a tarp for Vertical dynamic deflection is a real black eye.

Seriously, maybe we should stop ripping off two bit C-USA commuter schools and South Carolina and ban Sandstorm and Zombie Nation from ever being played at Kyle again.

Oh and fire the clown of a coach who peads the team in their silly jumping jack antics too.

We are A&M, not UH ot UCF.

I was in sec 245 row 9 and it was very noticeable. Needs to be looked at!

Sec 348 (third deck, south end) was also bouncing.

1. Steel is flexible.

2. LSU game probably used up several hundred of the several hundred thousand cycles of the available fatigue life of the structure.


hth

It was so bouncy in 347

Eff. My season tickets starting next year are in the sez. I'm gonna die, aren't it...?

I has video evidence of deflection.

How do you post videos to facebook?

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I was in sec 245 row 9 and it was very noticeable. Needs to be looked at!

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As was I, it was a substantial amount of movement. By the time I got my phone out to take video, people had stopped jumping, and it was not as noticeable I the video.

I'm supposed to get up and jump when sandstorm and zombie nation play?

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Seriously, maybe we should stop ripping off two bit C-USA commuter schools and South Carolina and ban Sandstorm and Zombie Nation from ever being played at Kyle again.

Oh and fire the clown of a coach who peads the team in their silly jumping jack antics too.

We are A&M, not UH ot UCF.

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We are A&M. What the **** does that mean? We are a perennial mid tier, underperforming program so we aren't allowed to play certain amplified music?

Fall on a dick brah.

Real black eye for somebody.

And tell me why we didn't build a new stadium?

Charlie strong and Steven Spielberg are behind this

We keep playing like we have this year, we won't need the south zone anyway. Put a tarp over it.

Very impressed with all the big boy words being whipped out in this thread. I'm sure they mean something important. T&P for New Kyle, I guess

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I am fightin' Texas Aggie Class of '92 B.S. Mechanical Engineering and I support this thread!

Do you guys remember watching the film in grade school showing the Tacoma Narrows Bridge up in Washington get torn to shreds by wind blowing at the natural frequency of the bridge even though a bunch of engineers "probably considered the wind"?

Do you remember the Hilton in Kansas City that collapsed in the middle of a concert in the foyer because of a fundamental misunderstanding of how the structure would be used (people all standing on the balconies of every floor at the same time to watch) causing a physical design failure?

How many years have we had Sandstorm playing at Kyle Field? Or the other songs that have never been played before at Kyle? It's probably fine, but engineers don't get paid to say it's probably fine. They get paid to consider account for the rare and unlikely when the consequence could be catastrophic.

Thanks Magnus for bringing some attention to this - - TexAgs will get it public enough to get it to the right folks!

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Tava Narrows was a fumction of not really understanding steel consteuction in bridges (it was still a relatively new material at the time in the bridge world) and the designer being notorious for using the smallest and lightest members he could. In the case of the Tacoma Narrows, it was catasteophic when the wind bit a certain velocity.

The Hilton balcony was a combination of crappy design, crappy construction and shoddy inspection. The balcony would have failed at some point as a result of this. The concert just sped up the process.

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I am fightin' Texas Aggie Class of '92 B.S. Mechanical Engineering and I support this thread!

Do you guys remember watching the film in grade school showing the Tacoma Narrows Bridge up in Washington get torn to shreds by wind blowing at the natural frequency of the bridge even though a bunch of engineers "probably considered the wind"?

Do you remember the Hilton in Kansas City that collapsed in the middle of a concert in the foyer because of a fundamental misunderstanding of how the structure would be used (people all standing on the balconies of every floor at the same time to watch) causing a physical design failure?

How many years have we had Sandstorm playing at Kyle Field? Or the other songs that have never been played before at Kyle? It's probably fine, but engineers don't get paid to say it's probably fine. They get paid to consider account for the rare and unlikely when the consequence could be catastrophic.

Thanks Magnus for bringing some attention to this - - TexAgs will get it public enough to get it to the right folks!

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Tava Narrows was a fumction of not really understanding steel consteuction in bridges (it was still a relatively new material at the time in the bridge world) and the designer being notorious for using the smallest and lightest members he could. In the case of the Tacoma Narrows, it was catasteophic when the wind bit a certain velocity.

The Hilton balcony was a combination of crappy design, crappy construction and shoddy inspection. The balcony would have failed at some point as a result of this. The concert just sped up the process.

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I thought they altered the original engineering design (which would have been fine) during actual construction without having it approved and reconsidered by the engineer. The audible changed the loading on the support rods between levels.

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The audible changed the loading on the support rods between levels.

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Crap, they audibled to a bubble screen, didn't they?

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The audible changed the loading on the support rods between levels.

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Crap, they audibled to a bubble screen, didn't they?

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That was the first audible, but ultimately they went with the short side option.

Fatigue is not the concern. Fatigue is cracking from many thousands of reversals (tension to compression and back) of relatively small stress levels. Failure level stress from large deflection is the concern, it may be fine but should be reviewed.

As said the Kansas City hotel accident was a contractor mistake not a engineering design failure.

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I has video evidence of deflection.

How do you post videos to facebook?

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Can someone help this man?

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As said the Kansas City hotel accident was a contractor mistake not a engineering design failure.

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Yep. It was on one of the Modern Marvels / Engineering Disasters episodes they did a few years back. And MM made it clear that the collapse was due to unauthorized design changes in the field.

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I expect that the frequency for people bouncing to music would be around 2 cycles per second, but say a range of 1 to 3 cps for starters. Two parameters here, amplitude and frequency of the vertical dynamic force.

What are the amplitudes of motion at that location that are actually occurring? Should be obtainable from video analysis. If less than the amplitudes in the above question, wala, we be scrong den.

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Sandstorm is 136 BPM

I'll give y'all a break since I took solid mechanics more recently than all you olds

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Fatigue is not the concern. Fatigue is cracking from many thousands of reversals (tension to compression and back) of relatively small stress levels. Failure level stress from large deflection is the concern, it may be fine but should be reviewed.

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You mean low cycle fatigue is the concern.

I'm so glad someone posted about this. My family and I sat on 2nd deck for the Mizzou game. During both the Power intro and Sandstorm, the deck was moving significantly. My dad was freaking out and was afraid the whole thing was going to collapse. Nobody believed me when I told them about how much I saw the deck move vertically. I hope someone checks this out.

My God is Sandstorm going to be the cause of a safety renovation to Kyle Field???

Waiting for civil engineering professor to check it out tonight and post here

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What's the frequency, Kenneth.

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You're a smart fellow, but you need to learn how to film with iPhone. Turn it sideways so you film in landscape, otherwise it looks pitiful on youtube.