GB/T 18575-2017 in English

1. Background and significance of the standard

GB/T 18575-2017 "Shaking table test method for seismic performance of building curtain walls" is one of the important national standards in the construction industry, mainly used to evaluate the seismic performance of building curtain walls under earthquakes. This standard replaces the old version of GB/T18575-2001, adds the selection method of simulated seismic waves and the test report format, and supplements details such as specimen requirements and sensor layout.

2. Interpretation of the core content of the standard

2.1 Basic principles of shaking table test

The shaking table test is to simulate the real earthquake environment and apply dynamic loads to the building curtain wall specimens to test their seismic performance. This method is widely used in the detection and evaluation of curtain wall projects to ensure the safety of buildings in earthquakes.

2.3 Curtain wall specimen requirements

The curtain wall specimen should be a full-scale product, and the height and width must meet the design requirements. The component-type curtain wall specimen should not be less than one storey height and three grids, and the unit-type curtain wall should include at least two upper and lower units and three left and right units.

2.4 Loading method and data processing

The test loading adopts the graded multiple loading method, covering different acceleration amplitudes of frequent earthquakes, design intensity earthquakes and rare earthquakes. The dynamic characteristics of the specimen are measured by the white noise excitation method, and the displacement, acceleration and strain parameters are recorded.

3. Implementation suggestions

3.1 Selection and calibration of vibration table

It is recommended to use a low-frequency large-displacement CNC vibration table with iterative correction function, and regularly calibrate the equipment performance to ensure the accuracy of the test data.

3.2 Sensor layout optimization

According to the dynamic characteristics of the curtain wall specimen, three-dimensional acceleration sensors and non-contact displacement meters are reasonably arranged at key locations to avoid interfering with the dynamic response of the specimen.

3.3 Data analysis and report writing

The test data should be strictly calibrated and filtered, and the test report should be written according to the standard requirements to ensure that the report content is comprehensive and the format is standardized.