An extreme typhoon wind speed probability distribution model based on meteorological station observation data and a typhoon wind speed design evaluation method

Abstract

The invention belongs to the field of engineering structure wind resistance design, and particularly relates to an extreme value typhoon wind speed probability distribution model based on meteorological station observation data and a typhoon wind speed design evaluation method. The invention provides an extreme value typhoon wind speed probability distribution model based on meteorological stationobservation data and a typhoon wind speed design evaluation method, solves the problem that a wind speed value obtained through actual measurement deviates from a real value under a standard landformdue to landform change, and provides reliable basic data for typhoon wind speed design evaluation. A cross-domain threshold method and generalized Pareto distribution are adopted to establish an extreme value typhoon wind speed probability distribution model based on observation data of a meteorological station, so that limited actually-measured typhoon wind speed data are fully utilized; The influence of wind speed and wind direction correlation and wind speed sequence unsteady-state characteristics is comprehensively considered, and more reasonable and accurate typhoon wind speed design canbe provided for building wind resistance design.

Description

technical field [0001] The invention belongs to the field of wind resistance design of engineering structures, and in particular relates to an extreme typhoon wind speed probability distribution model based on meteorological station observation data and an evaluation method for design typhoon wind speed. Background technique [0002] For coastal typhoon-prone areas, the design of building structures, especially high-rise or high-rise structures, is often controlled by wind loads. Therefore, it is of great significance to accurately evaluate the design wind loads borne by buildings in typhoon areas to improve the level of wind resistance design and ensure the safety of structures. The design wind load is directly related to the design wind speed in the area where the building is located. my country's load code stipulates that the 10-minute average maximum wind speed once in 50 years at a height of 10m under open Class B landforms is the basic design wind speed. For importan...

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Problems solved by technology

However, according to the existing research experience, this method still has the following deficiencies: 1) The wind speed data measured by the weather station usually does not consider the influence of landform changes. There are often earth-shaking changes at the beginning of the establishment of the station, and it is no longer the standard landform required by the code, so the obtained wind speed data should be corrected to obtain the value under the standard landform, otherwise the obtained wind speed data may be too small

2) In the probability analysis of the extreme wind speed of normal wind, the traditional generalized extreme value method uses the maximum value data year by year to carry out the probability distribution statistics of the extreme wind speed, so a large amount of data is required to obtain reliable results

However, for typhoons, which are non-continuous (may not occur in some years) and have very limited measured data, it is difficult to obtain reasonable results by using the traditional generalized extreme value method

3) In the past, when calculating the design wind speed, it is usually considered that the wind speed is a steady-state random process without considering the unsteady characteristics of the wind speed that may be caused by changes in the climate environment

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