Solar electromechanical fire-fighting earthquake-resistant bracket

Do post-earthquake steel structures withstand fire?

Substantial seismic energy can impose large deformation on steel structures, and the subsequent fire would further reduce the load-bearing capacity of structures, leading to an even more destructive threat than the earthquake itself. Therefore, it is essential to investigate the fire resistance of post-earthquake steel structures.

How does earthquake induced damage of CFRM affect steel?

The earthquake-induced damage of CFRMsignificantly increased the thermal degradation in strength and stiffness of steel material under fire, leading to a pronounced reduction in load capacity of beams and columns , beam-column joints and moment-resisting frame .

Does self-centering force provide sufficient deformation capacity during earthquake?

The test results showed that self-centering force provided by the springs was adequate to eliminate the residual deformations before the tube members yielding occured and validated that this bracing system was able to provide sufficient deformation capacity to consume energy during earthquake.

Is Fr-ECC fireproof?

Moreover, the long-term durability of FR-ECC at different environmental conditions needs special attention. At the structural level, extensive researches on the fire resistance of other post-earthquake structural elements, such as steel column and beam-column joint, using FR-ECC as fireproof are warranted in future research.

Why did a beam flange fail after a quake?

Typically, this damage began at the full penetration weld between the beam bottom flange and the column flange. From the results of postearthquake survey, it has been demonstrated that the main reason for these failures was the inferior ductile rotation capability in these welded connections.