## 1 Introduction
Therefore, it can be concluded that, under the requirement of blockage ratio compliance, incoming wind field characteristics are the primary factors influencing wind tunnel test results, rather than changes in model geometric dimensions. The atmospheric boundary layer wind field is mainly simulated and generated within a wind tunnel laboratory using passive devices such as spires and roughness elements. The characteristics of the wind field are not only related to the selection and arrangement of these passive simulation devices but also influenced by the wind tunnel laboratory itself. Significant differences in boundary layer thickness have been observed under different laboratory flow field conditions [16]. The structural design of the wind tunnel laboratory, such as closed-circuit and open-circuit wind tunnels, also exhibits different turbulence levels in the boundary layer flow field of the test section [17; 18]. In pressure measurement model tests, one of the key parameters is the reference static pressure, which is commonly defined as the mean static pressure of undisturbed wind at the top of the test structure [19; 20]. The reference static pressure is essential for obtaining accurate wind tunnel test results. During the tests, the measured pressure at each tapping point is actually the difference between the test pressure and the reference static pressure. As such, any errors in determining the reference static pressure can lead to a global discrepancy in all the pressure measurements across the test points. He [21] found that in an open-circuit wind tunnel test section, there was a linear correlation between the average wind speeds at two distinct locations along the wind, whereas the static pressure difference exhibited a linear correlation with the square of the average wind speed. The research also suggested that there could be notable discrepancies in the linear correlation coefficients among different wind tunnel laboratories. As wind tunnel tests yield substantial information crucial for project management and planning [22], obtaining accurate and reliable test data is essential, which indicates that ensuring consistency in experimental results among various wind tunnel laboratories is imperative. The current wind tunnel testing standards do not provide detailed guidance on the aforementioned issues, and the presence of these issues can evidently affect the accuracy of wind tunnel tests. As addressed herein, the primary objective of this study is to investigate whether the results of the same test are consistent across different wind tunnel laboratories and to analyze the specific reasons for any discrepancies, with the goal of improving repeatability between different wind tunnel facilities. This will be achieved by conducting detailed comparisons through pressure measurement wind tunnel tests on the same CAARC standard model, guided by the same standard, in both a closed-circuit wind tunnel and a return-flow wind tunnel. The statistical characteristics of the surface pressure, including the mean, RMS, probability density function (PDF), peak factor, extreme wind load, and aerodynamic base forces, are discussed. The rest of this paper is organized as follows. Section 2, \"Experimental Setup\", details the experimental arrangement, including the parameter settings for the wind tunnel tests, specifics of the measurement equipment, and calibration procedures. This section also includes a description of the CAARC standard tall building model and the testing environment to ensure reproducibility. Section 3, \"Results and Discussion\", presents the experimental results and provides an in-depth analysis of the findings. This section compares the differences in results across various wind tunnel laboratories, analyzes the causes of these discrepancies, and provides corrections for the relevant findings. Finally, Section 4, \"Conclusion\", summarizes the major conclusions of this study.