What is fire ?
Solid
Liquid
Hot Gas (low temperature)
Plasma (high temperature)
We name the uncontrolled burning "Conflagration"
Which one causes the most serious loss in our civil society ?
Storage fire
Forest fire
Compartment fire or building fire
Grassland fire
One of the main differences between two objectives of the fire tests we are learning herein is that the subject is under or after fire.
Why conducting test instead of design ? Fire resistive test is to
Establish principles for design
Calibrate the design to be condcuted in actual engineering
Determine fire resistance rating for a specific building
Directly determin the fire resistance of a whole building
How to Determine Fire resistance for general buildings? By fire duration statistics. Then the normal fire resistance is in the range of
1~3 seconds
1~3 minutes
1~3 hours
1~3 days
The designed fire resistance should be higher than the actual one, and the security possibility should be more than
30%
50%
70%
95%
Which one is not the ultimate limited states for fire resistance capacity of structures
strength
stability
integrity
thermal insulation
Temperature-time curve used in test is generally steeper than the acutal fire curve in reality
Matching Options
1
Reaction frames
2
Hydraulic jack
3
Reaction girder
4
Furnace
5
Specimen
Is the Mechanism of Thermocouples originated from Thermoelectric effect
Advantages of infrared thermal image do not include
Non-contact
Two-dimension
More accurate than thermocouples
Real-time
Distribution temperature sensing
Inject a short laser pulse into the fiber
Light propagates and interacts with the fiber material
Collect and separate backscattered light
Detect the time‑resolved signals, Compute the intensity ratio
Calibrate against a known temperature, Produce the temperature profile