993002012 羅來罕 作業三

In my preliminary testing, I found that the shock resistance of the "SUSPENSION" and the "CABLE-STAY" is obviously better than the other three.

The figure is the breakage of a pure "CANTILEVER-TRUSS" structure caused by a magnitude 7.5 earthquake from San Andreas Fault.



The figure is the breakage of a pure "CABLE-STAY" structure caused by a magnitude 7.5 earthquake from San Andreas Fault.



Then, I tried adding safety features into the structure. I found every feature is helpful to the shock resistance. Most of all, the "DUCTILE MATERIALS" the most effective.

For exemple, the pure "BEAM GIRDER" added by "BEARINGS" and "SHOCK ABSORBERS" can endure magnitude 7.5 earthquake.

After adds the "DUCTILE MATERIALS", the tolerance limits can be up to magnitude "8.5".



Master these conditions, I tried many various combinations of possible to combine the best results out.

Many combinations can endure the magnitude 8.5 earthquake,but would be broken at 9.0.

Exemple:
1.


2.


...

However, this combination can just endure the magnitude 8.2 earthquake,but would not completely rupture at 9.0 . So, considering to the security, I think this bridge is the best!




End.