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Abstract

By comparing the applicability of various wind speed probability distribution models in the calculation of the basic wind speed of bridges, the differences between different distribution models were analyzed, and the important influence of different distribution models on the value of extreme wind speed of highway bridges was studied. This paper also discussed how to select suitable wind speed probability models according to regional characteristics. Based on the measured wind speed data of five regions, the differences between the models were verified based on the statistical results of the maximum annual average wind speed, and the rationality and applicability of the probability distribution model for each region were discussed according to the regional distribution heat map of the current Wind-resistant Design Specification for Highway Bridges (JTG/T 3360-01-2018). The results show that the current code increases the value of the basic wind speed in the strong wind area, and the changing trend of each wind speed model decreases in different recurrence periods, which can effectively ensure the safety of the basic wind speed value of the bridge and the continuity of wind field distribution. Extreme wind speed predicted based on generalized extreme value distribution is the largest, and that based on generalized Pareto distribution is the smallest. The five probability distribution models can be roughly divided into three categories: wind speed increase type, wind speed growth type, and wind speed stabilization type, and different types of models are suitable for different wind speed variation areas.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.014

First Page

78

Last Page

83

Submission Date

March 2025

Reference

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