Morandi Bridge Collapse
?Download as PPTX, PDF?
1 like?824 views
The document discusses possible failure sequences for the collapse of the Morrandi Bridge. It notes that the bridge collapsed in line rather than falling sideways based on online images. The author uses the bridge in their cable stay bridge lectures to illustrate simple load paths and lack of robustness. They have drawn a possible collapse sequence based on mental models of initial stay corrosion leading to an 'unzipping' collapse mechanism without alternative load paths, culminating in unsupported linkspans collapsing. However, this sequence is not validated by computer modeling.
Morandi Bridge Collapse
- 1. 25 August 2018 1
- 2. Morrandi Bridge Possible collapse sequences Thoughts on sequences Following a discussion regarding the causes of the collapse of the Morrandi Bridge, I thought about likely failure sequences. While sitting at Schipol airport on my way home, I looked at the online images of the collapse. The bridge collapsed in line and did not fall sideways. 25 August 2018 2
- 3. Morrandi Bridge Possible collapse sequences Thoughts on sequences Following a discussion regarding the causes of the collapse of the Morrandi Bridge, I thought about likely failure sequences. While sitting at Schipol airport on my way home, I looked at the online images of the collapse. The bridge collapsed in line and did not fall sideways. 25 August 2018 3
- 4. Morrandi Bridge Possible collapse sequences Mental models sequences I use Morrandi¡¯s Lake Maracaibo Bridge as an introduction to my cable stay bridge lectures. It offers a simple and clear load path. With single stays and linkspans it also has little robustness and its partial collapse offers an introduction to risks. With this knowledge I have drawn a possible collapse sequence. Note this is from mental models, they are not validated by any computer modelling. 25 August 2018 4
- 5. Morrandi Bridge Possible collapse sequences Mental models sequences I use Morrandi¡¯s Lake Maracaibo Bridge as an introduction to my cable stay bridge lectures. It offers a simple and clear load path. With single stays and linkspans it also has little robustness and its partial collapse offers an introduction to risks. With this knowledge I have drawn a possible collapse sequence. Note this is from mental models, they are not validated by any computer modelling. 25 August 2018 5
- 7. Stay corrosion a worldwide problem
- 8. Possible Sequence No 1
- 9. Single stays no alternative load path
- 10. .
- 11. .
- 12. ¡®Unzipping¡¯ of other stay
- 14. .
- 15. Linkspans have no support
- 16. After collapse
- 17. .
- 18. End 25 August 2018 18