Architecture & Civil Engineering

Points Selection in High-Dimensional Random-Variate Space for Simulating Stationary Stochastic Wind Field

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  • College of Civil Engineering,Hunan University,Changsha 410082,Hunan,China
徐军 ( 1986-) ,男,博士,副教授,主要从事结构可靠度与大跨度结构抗灾性能研究。

Received date: 2021-01-12

  Revised date: 2021-03-08

  Online published: 2021-03-23

Supported by

Supported by the National Natural Science Foundation of China ( 51978253)

Abstract

To perform wind-resistant reliability analysis of structures,it is necessary to simulate the stationary stochastic fluctuating wind field. Simulating the stochastic fluctuating wind fields through spectral representation method ( SRM) often involves thousands of random variables,leading to the“curse of dimensionality”. On this basis, this paper proposes a new method for points selection in high-dimensional random-variate space to ensure the accuracy and efficiency of SRM. The new method mainly consists of three steps: the decomposition of high-dimensional random-variate space,the points selection in the orthogonal subspaces,and the random pairing to obtain the representative points and assigned probabilities in high-dimensional random-variate space. The proposed method is used to investigate the horizontal wind field acting along the height of a 30-story frame-shear wall structure. The results show that the proposed method is of high accuracy and efficiency for the simulation in the second-order statistical sense and a complete probability set can be constructed by only using a small number of representative sample processes. Besides,the proposed method can be further combined with the probability density evolution method to elaborately evaluate the probabilistic response of wind-induced vibration of structures.

Cite this article

XU Jun, LI Zhefan, Zhang Yang, et al . Points Selection in High-Dimensional Random-Variate Space for Simulating Stationary Stochastic Wind Field[J]. Journal of South China University of Technology(Natural Science), 2021 , 49(10) : 95 -103 . DOI: 10.12141/j.issn.1000-565X.210015

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