科研之友
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摘要
The T1 tower, which was a landmark high-rise building with the height of 452 m in Changsha city, was taken as a case study for two field measurement study on strong stack effect in winter, and a serial of measurement data of the strong stack effect pressure difference of the shuttle elevator in natural meteorological conditions was obtained. A numerical simulation program HiSTACK was developed subsequently and the stack effect pressure differences of the elevators were analyzed and compared with the measured results. Three optimization measures to alleviate the strong stack effect were explored by numerical simulation. It can be concluded that the maximum stack effect pressure difference of the shuttle elevator reaches as high as 135. 71 Pa, which exceeds the threshold value of the elevator system resisting the stack pressure and which was exactly the direct cause of elevator system failure. Inadequate design considerations of anti-stack effect of this building, such as direct space connections between the lobby floor of the tower with the podium building, unreasonable indoor space partitions and poor air tightness of the envelopes etc, are all attributed to the strong stack effect of the building. The numerical simulation results show that the pressure difference distribution of the shuttle elevator is consistent with the field measurement results well, which the applicability and accuracy of HiSTACK can be verified. Measures such as improving the air tightness class of the curtain wall of the lobby floor, adding elevator lobby doors at the top floor of the building and cooling the elevator shaft can effectively alleviate the stack effect pressure difference of the elevator, and consequently the maximum stack effect pressure difference is reduced by the range from 18. 3% to 41. 5% . ? 2023 Science Press.
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