General provisions

1, the combination of the fire resistance of floor boards should be consistent with current national standard "architectural design code for fire protection} GB50016 requirements and other standards on the floor;

2, floor boards use a template as a permanent non-composite slabs, its fire-resistant design of reinforced concrete slab should be fire-resistant design method.

3, the combination of floor boards rely on positive reinforcement or rebar bending region of the lower chord truss composite slabs from resisting the effects, its reinforced protective layer thickness [excluding the bottom die thickness) should be based on the component functionality to meet the appropriate fire resistance requirements.

4, no combination of fire protection fire resistance of floor boards fire test methods or calculations can be determined.

A fire using the fire test method to determine the limits of the test specimen parameters and boundary conditions of the slab should be the same as the actual project and shall comply with the current national standard "building components resistance test methods" GB/T9978 requirements;

Two calculation methods used to determine when this specification shall meet the requirements of Section 7.2.

Floor Deck Coating fire protective coatings, should comply with the current Association standards "fireproof coatings application of technical specifications} CECS24 requirements.

No fire protection pressure plate combination floor limit state

1 calculated in this section must be continuous composite floor board or consolidation of single span plate at one end and allowed large deformation under fire composite slabs. Pressure plate simply supported composite slabs of fire resistance can be no greater than 0.5H consider; than 0.5H, you can configure through the positive moment area of ​​the reinforced fire retardant paint or coating to meet their corresponding fire resistance requirements.

2 fire resistance of composite slabs calculation, we can use the following assumptions:

One does not consider the floor bearing on the floor when the temperature constraint of the plane (axial force) effects.

2 when the temperature does not consider the pressure plate on the floor bearing capacity;

3 Assuming the temperature inside the floor and away from considering only backfire on the depth of the surface;

4 does not consider the shear bond capacity limit state;

5 In addition to the floor by the force reinforcement, the floor of the structural steel, the temperature may be used as reinforcement force cracking barium tendons;

6 supporting composite floor beams meet fire resistance requirements.