This standard specifies the wind pressure deformation performance 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 15227-1994 Wind pressure deformation performance test method for building curtain walls GB/T15227-1994 standard download decompression password: www.bzxz.net

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 China Academy of Building Research for interpretation. 30. "Test method for wind pressure deformation performance of building curtain wall" GB/T15227-941 Subject content and scope of application
This standard specifies the test method for wind pressure deformation performance of building curtain wall. 429
This standard applies to building glass curtain wall. 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 composed of metal, glass and sealing materials suspended on the load-bearing structure. 2.2 Deformation under wind pressure capacity
refers to the ability of a building curtain wall to maintain normal use functions without any damage under the action of wind pressure perpendicular to it. 2.3 Pressure difference pressure difference refers to the difference in absolute air pressure on 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 Residual deformation residual deformation When the external force disappears, the deformation of the component still exists. 2.5 Frontal displacement refers to the linear displacement in the direction of the surface normal measured on the surface of the load-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 load-bearing rod or mosaic of the specimen (symbol is fmax). 2.7 Relative frontal deflection refers to the ratio of the surface normal deflection value of the main load-bearing member of the test piece to the distance between the measuring points at both ends of the member (the symbol is fmax/l, 1 is the distance between the measuring points at both ends of the member). 3 Testing
3.1 Deformation test
Test the variation law of the surface normal deflection of the main load-bearing member of the test piece 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 test
Test the ability of the test piece to avoid damage under the action of fluctuating wind load, and evaluate it by whether functional impairment and damage occur.
3.3 Safety test
Part 1 Standard test method for main building materials Test the ability of the test piece to avoid damage under the action of maximum instantaneous wind load, and evaluate it by whether functional impairment, residual deformation or damage occurs. 4 Testing device
4.1 The testing device should have an opening large enough for the installation of the test piece and be capable of detecting the wind pressure deformation performance of the curtain wall. It consists of the parts shown in Figure 1.
Figure 1 Schematic diagram of the longitudinal section of the testing device
a—static pressure box; b—air inlet baffle; c—anemometer; d—manifold; e—pressure supply system; f—pressure gauge; g—test piece; h—support point of the test piece; i—displacement meter 4.2 The testing device should be equipped with a safety net to prevent the test piece from being damaged suddenly and causing injury. 5 Test piece
5.1 Each component of the test piece should be a qualified product tested by the manufacturer. The installation and inlay of the test piece should meet the design requirements. No special accessories should be added or other special measures should be adopted. The glass and glue used for the test piece should be the same as those used in the project.
5.2 The width of the specimen shall include at least three vertical load-bearing members, at least one of which can bear the design load; the height of the specimen shall include at least one floor height, and there shall be two or more connections to the load-bearing structure in the vertical direction. The installation and stress conditions of the specimen shall be as consistent as possible with the actual situation. 5.3 The specimen must include typical vertical joints and horizontal joints. 6 Testing methods
V. Building decoration materials
6.1 After the installation of the specimen is completed, it must be checked and the test can only be started after it meets the design requirements. During the inspection, the openable part of the specimen is opened and closed several times and finally closed. 6.2 Install the displacement measuring instrument at the position where the measuring point is required to be arranged on the specimen. The measuring points are stipulated as follows: the middle measuring point of the load-bearing member is arranged at the midpoint of the member; the measuring points at both ends are arranged at 10mm from the two ends of the member to the midpoint. The center measuring point of the inlaid part is arranged at the intersection of the two diagonals, and the two end measuring points are arranged in the direction of the midpoint of the two ends of the inlaid part in the length direction, 10mm away from the inlaid edge. The pressurization sequence is shown in Figure 2.
Pa=250Pa
"Time
Preparatory pressurization deformation testPreparatory pressurization deformation testRepeated pressurizationRepeated pressurization|Safety test (positive pressure)
(Negative pressure)\(Positive pressure) (Negative pressure)
Figure 2 Schematic diagram of pressurization sequence
6.3 Preparatory pressurization
Use 250Pa pressure to load Smin as preparatory pressurization. After the pressure relief is stable, record the initial displacement of each measuring point. The preparatory pressure is Po.
6.4 Deformation testwwW.bzxz.Net
Perform positive pressure test first, then negative pressure test. The test pressure is graded. The pressure rise and fall of each level shall not exceed 250Pa, and the pressure action time of each level shall not be less than 10s. The pressure rises and falls until the deflection value of any load-bearing member reaches L/360, and the surface normal displacement under the action of each pressure difference and the displacement reaching L/3 The pressure value at 60 is P1.6.5 Repeated load test
Use each level of test pressure as the peak and the amplitude as half of the pressure value to carry out fluctuation test. The highest peak value is P,×1.5, and the duration of each level of fluctuation pressure is not less than 60s, and the number of fluctuations is not less than 10 times. Record the maximum test pressure value P2 when there is no functional disorder or damage.
6.6 Safety test
If there is no functional disorder or damage in the repeated load test, a safety test is carried out, and the test pressure is increased to P3, then reduced to 0, then reduced to -P3, and then increased to zero. The time of pressure increase and decrease is not less than 1s, and the pressure duration is not less than 3s. If necessary, 432
Part 1 Test method standard for main building materials can be continued for up to 10s. Then record the functional disorder, residual deformation or damage situation and location. P3=2Pi, that is, relative deflection
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