(天津大学建筑工程学院，天津 300072)
［摘要］弦支筒壳的自振频率分布密集，且基频较低，可能会与脉动风的周期相近，故受脉动风影响会较大，其主要贡献模态往往分布在前数十阶，以动力学计算为基础的时域分析法能较好地计算此类结构的风振响应。以一实际工程为例，采用线性自回归滤波法(AR)模拟随机脉动风速时程，进行时域分析，研究表明，脉动风对结构竖向位移影响较大，风振系数可取1.6；对结构横向位移影响较小，风振系数可取1.3；对纵向位移影响最小，风振系数可取1.15。
［关键词］柱面网壳；弦支筒壳；风振响应；AR法；风振系数
Analysis on wind-induced vibration response of cable supported barrel vault structures
Qiao Wentao, Chen Zhihua(School of Civil Engineering, Tianjin University, Tianjin 300072, China)
Abstract: The self-vibration frequencies of cable supported barrel vault structures are very close to one another and the first –self-vibration- frequency is low. The periods of structure may be very close to the periods of the fluctuating wind, so the influence of the fluctuating wind on the structure is often great. The main contribution mode is the first tens of modes and the wind-induced vibration response of the cable supported barrel vault will be well calculated by time domain analysis method based on dynamic calculation. Taking a practical project for example, the linear auto-regressive filtration (AR) method was used to simulate the fluctuating wind, and the time domain analysis was carried out. The result indicates that the influence of the fluctuating wind on vertical displacement of the cable supported barrel vault is great, and the wind-induced vibration coefficient is 1.6. The influence on transverse displacement is small, and the wind-induced vibration coefficient is 1.3. The influence on longitudinal displacement is smaller, and the wind-induced vibration coefficient is 1.15.
Keywords: cylindrical latticed shell; cable supported barrel vault; wind-induced vibration response; AR method; wind-induced vibration coefficient
国家自然科学基金(50778122)，新世纪优秀人才支持计划(NCET)。
作者简介：乔文涛，博士，Email:tottyer@126.com。
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