Miami Pedestrian Bridge, Part XIII 81

[JAE]

A continuation of our discussion of this failure. Best to read the other threads first to avoid rehashing things already discussed.

Part I
thread815-436595

Part II
thread815-436699

Part III
thread815-436802

Part IV
thread815-436924

Part V
thread815-437029

Part VI
thread815-438451

Part VII
thread815-438966

Part VIII
thread815-440072

Part IX
thread815-451175

Part X
thread815-454618

Part XI
thread815-454998

Part XII
thread815-455746


Check out Eng-Tips Forum's Policies here:
faq731-376

 

[Tomfh]

The top chord had little restraint near the end, but the bottom chord was restrained by the diagonals

It’s a simple truss, so there’s no irresistible forces stopping members shrinking a bit. It can’t pull itself by its bootstraps.

 

[hokie66]

That's the problem, it is not a simple truss. It is a frame. It can't pull itself up by its bootstraps if the joints are not strong enough, and they weren't.

If it were a steel truss, you are correct, but then steel doesn't shrink, and its joints are ductile.

 

[JAE]

Please discontinue posting in this thread. Go to thread815-459940
for any further posts.

This topic is broken into multiple threads due to the long length and many images creating longer load times for some. If you are NEW to this discussion, please read the following threads prior to posting to avoid rehashing old discussions.

Part I
thread815-436595

Part II
thread815-436699

Part III
thread815-436802

Part IV
thread815-436924

Part V
thread815-437029

Part VI
thread815-438451

Part VII
thread815-438966

Part VIII
thread815-440072

Part IX
thread815-451175

Part X
thread815-454618

Part XI
thread815-454998

Part XII
thread815-455746

Part XIII
thread815-457935

 

[JAE]

Earth314159 - please stop posting here - go to Part IV. Thanks.

 

[hacksaw]

All design and Q/C focus aside, completing the work with traffic underway seems bit worrisome.

 

[Denial]

JAE's instruction should read:
[ ][ ][ ][ ]G O [ ][ ] T O [ ][ ] P A R T [ ][ ] X I V