This standard specifies the air permeability test method for building curtain walls. This standard applies to building glass curtain walls. The test object is limited to the curtain wall itself and does not involve the joints between the curtain wall and other structures. GB/T 15226-1994 Air permeability test method for building curtain walls GB/T15226-1994 Standard download decompression password: www.bzxz.net

Where A-
weight of the board before painting (g);
-weight of the board after painting (g);
C——painting area (cm2).
The amount of paint used before dilution g/m2 (X2) is calculated according to formula (3): X2=Xi-Y
Where X,--the amount of paint used after dilution (g/m2); Y
-the percentage of solvent added during dilution.
(2) Measure the amount of paint used according to the solid content a. Determination steps
V. Building decoration materials
First weigh the tinplate on a balance with a sensitivity of 0.01g. Prepare the sample with the diluted sample by the spraying method in the "General Preparation Method for Paint Film" (GB1727-79), dry it for 24 hours under the conditions specified in the product standard, and then weigh it. b. Calculation method
The amount of paint used g/m2 (X) is calculated according to formula (4): BA×100×104
Wherein A——weight of the board before painting (g);
B—weight of the board after painting (g);
S——painting area (cm2);
D—solid content of the sample (%).
Note: The amount of paint used is measured by stretching the cover cloth on the frame and painting it, and the measurement is carried out in the same way. 29. "Test Method for Air Permeability of Building Curtain Walls" GB/T15226--94 Subject content and scope of application
This standard specifies the test method for air permeability of building curtain walls. (4)
This standard applies to building glass curtain walls. The test object is limited to the curtain wall itself, and does not involve the joints between the curtain wall and other structures.
2 Glossary
2.1 Curtain walls
Refers to the enclosure components made of metal, glass and sealing materials suspended on the load-bearing structure. 2.2 Air permeability refers to the performance of air passing through the curtain wall whose open part is in a closed state under the action of wind pressure. 2.3 Pressure difference refers to the difference in absolute air pressure between the inner and outer surfaces of the curtain wall specimen. When the pressure on the outer surface is greater than the pressure on the inner surface, the pressure difference is positive; otherwise it is negative. The unit of pressure difference is Pa (Pascal), 1Pa=1N/m2. 2.4 Standard condition Part I Test methods for main building materials Standard 426
The standard condition of air flow is as follows:
Temperature 293K (20℃);
Pressure 101.3kPa (760mmHg);
Air density 1.202kg/m2.
2.5Total air permeability volume of air flowUnder standard conditions, the air flow rate passing through the entire curtain wall specimen per hour. The unit is m/h, and the symbol is q. 2.6Joint length of the fixed partThe sum of the joint lengths of the non-opening parts on the curtain wall, based on the value measured on the inner surface. The unit is m, and the symbol is l1.2.7Length of opening jointThe sum of the circumferences of the opening panels on the curtain wall, based on the value measured on the inner surface. The unit is m, and the symbol is l2.2.8Volume of air flow through the unit joint length of thefixed part
Under standard conditions, the air permeability through each meter of the joint length of the fixed part per hour. The unit is m/mh, and the symbol is qolo
2.9Volume of air flow through the unit joint length of the opening part
Under standard conditions, the air permeability through each meter of the opening joint length per hour. The unit is m2/m·h, and the symbol is 902.3 Testing device
3.1 The testing device should have an opening large enough for the installation of the test piece and be able to detect the air permeability of the curtain wall. It consists of the parts shown in Figure 1.
3.2 The pressure box must be airtight except for the opening. 4 Test piece
4.1 The components of the test piece should be products that have passed the manufacturer's inspection, and the installation and inlay of the test piece should meet the design requirements. No special accessories shall be added or other special measures shall be taken. The glass and glue used in the test piece should be the same as those used in the project.
4.2 The width of the test piece should include at least one vertical load-bearing member that bears the design load. The height of the test piece should include at least one floor height, and there should be two or more places connected to the load-bearing structure in the vertical direction. The installation and stress conditions of the test piece should be as consistent as possible with the actual situation.
4.3 The test piece must include typical vertical joints and horizontal joints. 4.4 There shall be no air leakage at the joints between the test piece installation port and the test pieces of the test device. 5 Testing method
After the test piece is installed, it must be checked and the test can be started only after it meets the design requirements. During the inspection, the openable part of the test piece is opened and closed several times and then closed. 5.1 Preliminary pressurization: The test piece is preliminarily pressurized with a pressure of 250Pa for 5 minutes. Then the pressure is reduced to 0, and the test is started after the deflection of the test piece is eliminated. 5.2 Pressurize in sequence according to the pressure levels specified in Figure 2 and the table. The pressure action time of each level shall not be less than 10s. Record the measured values ​​of air permeability through the test piece under the pressure difference of each level, and take the measured value under the action of 100Pa as g (m/h) Figure 1 Schematic diagram of the longitudinal section of the detection device
a—static pressure box; b—air inlet baffle; c—anemometer; d—collecting pipe; e-pressure supply system; f-pressure gauge; g—test piece; h—support point of the test piece (ea) bzxz.net
Pressure sequence
Test pressure
100100| |tt||J0,20.30,5070m
170503020.10
Preparatory pressurization
Test pressurization
Figure 2 Schematic diagram of pressurization sequence
Time ($）
5.3 After sealing the opening gap of the openable part of the curtain wall specimen, pressurize in sequence according to the pressure levels specified in Figure 2 and Table 1. The pressure action time of each level shall not be less than 10s, and record the measured values ​​of air permeability through the fixed part of the specimen under the pressure difference of each level. And the measured value under the action of 100Pa is taken as i(m3/h). 6 Method for arranging measured values
6.1 Air permeability g2 (m2/h) of the open part of the curtain wall specimen: q2=q'q1
6.2 Convert gi and 92 into the air permeability 91 (m3/h) of the fixed part and the air permeability 92 (m2/h) of the open part under the action of 10Pa in the standard state:
293 ×9i·P,
Where P-. Test room air pressure value (kPa);
T——Test room air temperature value (K).
6.3 Calculate the air permeability 901 (m/hm) of the fixed part per unit seam length and the air permeability 902 (m3/hm) of the open part per unit seam length under the standard state: 91
q02=12
Use 901 and 902 as the grading index values ​​of the air permeability performance of the fixed part and the open part of the curtain wall respectively. 7 Test report
7.1 Type, specification and size of the test piece and related illustrations (including exterior and interior facades, longitudinal and transverse sections, and sections of profiles and accessories). The support system of the test piece and the opening method of the openable part must be indicated;7.2 The length of the inlay seam and the opening seam;
7.3 Type, thickness, maximum size and inlay method of glass;7.4 Material and brand of sealing material;
7.5 Name, material and brand of accessories;
7.6 Main instruments and equipment used for testing;
7.7 Temperature and air pressure of the test room;
7.8 Test results: air permeability per unit seam length of the fixed part and air permeability per unit seam length of the open part under standard conditions;
7.9 Test date and test personnel.
Additional notes:
This standard is proposed by the Ministry of Construction of the People's Republic of China. This standard is managed by the China Building Standards Institute, the technical management unit of building products and equipment standards of the Ministry of Construction. This standard was drafted by the Institute of Building Physics of the China Academy of Building Research. The main drafters of this standard are Tan Hengyu, Gong Wenzhong and Gao Jiu. V. Building decoration materials
This standard is entrusted to the Institute of Building Physics of the China Academy of Building Research for interpretation. 30. "Test method for wind pressure deformation performance of building curtain walls" GB/T15227-941 Subject content and scope of application
This standard specifies the test method for wind pressure deformation performance of building curtain walls. 429
This standard applies to building glass curtain walls. The test object is limited to the curtain wall itself, and does not involve the joints between the curtain wall and other structures.
2 Terminology
2.1 Curtain walls
Refers to the enclosure components made of metal, glass and sealing materials suspended on the load-bearing structure. 2.2 Deformation under wind pressure capacity.
Refers to the ability of the building curtain wall to maintain normal use function without any damage under the vertical wind pressure. 2.3 Pressure difference pressure difference refers to the difference in absolute air pressure between the inner and outer surfaces of the curtain wall specimen. When the pressure on the outer surface is greater than the pressure on the inner surface, the pressure difference is positive; otherwise it is negative. The unit of pressure difference is Pa (Pa). 1Pa=1N/m2. 2.4 Residual deformation residual deformation When the external force disappears, the deformation of the component still exists. 2.5 Frontal displacement frontal displacement refers to the linear displacement in the direction of the surface normal measured on the surface of the force-bearing rod or mosaic of the specimen (symbol is f). 2.6 Frontal deflection refers to the maximum difference in linear displacement measured on the surface of the specimen's load-bearing member or inlay (symbol: fmax). 2.7 Relative frontal deflection refers to the ratio of the surface normal deflection value of the specimen's main load-bearing member to the distance between the measuring points at both ends of the member (symbol: fmax/l, 1 is the distance between the measuring points at both ends of the member). 3 Inspection
3.1 Deformation inspection
Inspect the variation law of the surface normal deflection of the main load-bearing member of the specimen under the action of wind load, and evaluate it by the corresponding pressure value when the relative surface normal of the main load-bearing member reaches 60
.
3.2 Repeated load inspection
Inspect the ability of the specimen to avoid damage under the action of fluctuating wind load, and evaluate it by whether functional impairment and damage occur.
3.3 Safety inspection
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