|Table of Contents|

Study on wind vibration response and wind vibration coefficient of large-span truss structure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年04期
Page:
10-21
Research Field:
建筑结构
Publishing date:

Info

Title:
Study on wind vibration response and wind vibration coefficient of large-span truss structure
Author(s):
WU Yanru1;  DUAN Mingxun1;  XU Hao1;  ZHANG Wen1;  XING Guohua1;  CHEN Chen2
(1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. China State Construction Engineering Third Bureau Northwest Co., Ltd., Xi'an 710065, Shaanxi, China)
Keywords:
large-span truss structure;  wind tunnel test;  time-domain method;  wind vibration response;  wind vibration coefficient
PACS:
TU973
DOI:
10.19815/j.jace.2023.11032
Abstract:
In order to clarify the wind vibration characteristics of structure and propose recommended values of wind-induced vibration coefficient, based on wind tunnel tests and numerical simulation results, the time-domain method was used to calculate the static displacement and dynamic response of structures with different aspect ratios under static and fluctuating wind loads. The modified Newmark-β method was used to integrate and calculate the time-history response of each node, and the frequency domain method was used to analyze the spectral characteristics of structural displacement response. The root mean square value of structural displacement response was statistically analyzed, and on this basis, the wind vibration coefficients of different regions of structure under different incoming flow conditions were calculated. The results show that when the incoming flow is perpendicular to the longitudinal and transverse directions of structure, the top and wake areas of structure are prone to significant overall vortex-induced resonance, while the top and leeward areas of structure are prone to vortex-induced vibration under oblique wind direction. The direction of incoming flow has a significant impact on the root mean square distribution characteristics and maximum value distribution of displacement responses at each node of structure, with the maximum displacement response having a root mean square of 8.5 mm. The wind vibration coefficient is higher in areas with significant turbulence effects. The recommended values for wind vibration coefficients in different regions of structure under different incoming flow effects can provide reference for wind resistant design of such structures.

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Last Update: 2025-07-10