Building surface wind resistance grade design method based on climate analysis and numerical simulation

Abstract

The invention discloses a building surface wind resistance grade design method based on climate analysis and numerical simulation, and the method mainly comprises two parts: one part is strong wind simulation in different recurrence periods of a building area, and the other part is CFD numerical simulation. When extreme strong wind in a building area is simulated by utilizing an extreme value distribution model, simulation results of different extreme value distribution models and parameter estimation schemes are inspected, and finally the extreme value model closer to an actual value is determined, so that the simulation result is more credible than that of a single extreme value model. In CFD numerical simulation, extreme strong wind of an initial field is divided into 16 wind directions, and different wind directions correspond to different wind speed values, so that the obtained simulation result is more comprehensive than that of maximum wind simulation with only one wind direction, and more cost is saved in building design compared with that of the same wind speed value with 16 wind directions.

Description

technical field [0001] The invention relates to the technical field of architectural design, in particular to a method for designing building surface wind resistance grades based on climate analysis and numerical simulation. Background technique [0002] Wind is a meteorological factor that needs to be carefully considered in building design, and with global warming, extreme wind events are becoming more frequent, and wind disaster accidents occur from time to time. For example, in a hotel in Ningxia at the end of the last century, under the occasional gust of wind, a piece of curtain wall glass flew down, killing pedestrians at the entrance of the hotel on the spot; and the Shaw Building of Zhejiang University was blown down by a strong night, and almost all the curtain wall glass was blown down; as for the typhoon season , Buildings, structural belts, curtain wall glass and other leeward blown examples are not uncommon in coastal cities. Therefore, how to use climate anal...

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Problems solved by technology

First, with global warming, extreme wind disasters will become more frequent, and the return period can be 100 years or even longer, so it should be specific to each building; second, the distribution of national stations with long-term observation data is still It is relatively sparse, and some are far away from the target building, so it is necessary to use the data of the automatic weather station closest to the building for correction; third, the wind tunnel tests used by many construction units ignore the influence of the surrounding terrain and buildings on the target building; fourth, In the previous research, only the absolute wind speed value was considered for the strong wind in the return period, and the wind direction was not considered. If the simulation of the strong wind in 16 directions can be carried out, it will have great significance for the economy and safety of the specific building

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