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浙江大学学报(工学版)
浙江大学学报(工学版)  2021, Vol. 55 Issue (7): 1351-1360    DOI: 10.3785/j.issn.1008-973X.2021.07.014
土木工程、水利工程     
大跨越钢管塔双平臂抱杆的风致响应
黄铭枫1(),魏歆蕊1,叶何凯1,叶建云2,楼文娟1
1. 浙江大学 结构工程研究所，浙江 杭州 310058
2. 浙江送变电工程有限公司，浙江 杭州 310016
Wind-induced response of crane structure with double flat arms for long-span transmission towers
Ming-feng HUANG1(),Xin-rui WEI1,He-kai YE1,Jian-yun YE2,Wen-juan LOU1
1. Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China
2. Zhejiang Electric Power Transmission & Transformation Corporation, Hangzhou 310016, China
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摘要：

基于风洞高频天平测力试验，获取抱杆结构在不同风向角和平臂姿态条件下的体型系数；建立施工全过程中典型工况下双平臂抱杆有限元模型，计算得到抱杆结构在多种施工工况和不同风向下的动力时程响应和风振系数，并与高耸结构设计规范的风振系数取值进行比较分析. 结果表明，对于抱杆杆身部分，基于时程分析的风振系数结果沿高度变化规律比规范风振系数更加复杂；对于第一道腰环拉索以上部分，即抱杆顶部悬臂部分，规范给出的风振系数较为保守，显著大于时程分析方法风振系数. 对于抗风最不利工况，抱杆顶部在0°和45°风向角下的时程风振系数分别达到3.05，2.24（45°x向）和2.28（45°y向）.
关键词： 抱杆结构;  风洞试验;  有限元分析;  风振响应;  风振系数    
Abstract:

Based on the high-frequency force-balance wind tunnel test, the aerodynamic force coefficients of the crane structure were obtained under different wind direction angles and positions of double flat arms. Several finite element models of crane structure with double flat arms were established corresponding to typical working conditions of crane structure during the whole construction process. Wind-induced dynamic response analysis was carried out in time domain and the gust response factors of the crane structure were calculated under various working conditions and different wind directions. The calculated gust response factors were compared with the values derived from the design code of high-rise structures. Results show that the calculated gust response factors based on time history analysis for the body of crane structure exhibit more complicated behavior along the height than ones from the design code. Compared to the time history analysis, the design code overestimates the gust response factors for the top cantilever part of the crane structure, which is above the first guylines. Considering the most critical wind conditions, the gust response factor is calculated as 3.05 under 0 degree wind while the gust response factors of 2.24 (x-direction) and 2.28 (y-direction) are obtained for two orthogonal directions under 45 degree wind.
Key words: crane structure    wind tunnel test    finite element analysis    wind-induced dynamic response    gust response factor
收稿日期: 2020-05-16 出版日期: 2021-07-05
CLC:  TU 311  
基金资助: 国家自然科学基金资助项目（51838012）；浙江省基础公益研究计划资助项目（LGG18E080001）
作者简介: 黄铭枫（1976—），男，教授，从事结构风工程研究. orcid.org/0000-0002-3741-7550. E-mail： mfhuang@zju.edu.cn
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黄铭枫
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引用本文:

黄铭枫,魏歆蕊,叶何凯,叶建云,楼文娟. 大跨越钢管塔双平臂抱杆的风致响应[J]. 浙江大学学报(工学版), 2021, 55(7): 1351-1360.

Ming-feng HUANG,Xin-rui WEI,He-kai YE,Jian-yun YE,Wen-juan LOU. Wind-induced response of crane structure with double flat arms for long-span transmission towers. Journal of ZheJiang University (Engineering Science), 2021, 55(7): 1351-1360.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2021.07.014    或    https://www.zjujournals.com/eng/CN/Y2021/V55/I7/1351

图 1  输电塔和双平臂抱杆施工现场
图 2  双平臂抱杆风洞试验模型
图 3  风洞试验风向角和平臂姿态
平臂姿态 $\theta $/（°）
0° 0°、15°、30°、45°、60°、75°、90°；
22.5° 22.5°、37.5°、52.5°、67.5°、82.5°、97.5°、112.5°；
45° 45°、60°、75°、90°、105°、120°、135°
表 1  风洞试验风向角
图 4  抱杆标准节合力体型系数
$\theta $/（°） μ s 误差/%
风洞试验 文献[18]
0 2.41 2.31 ?4.15
45 2.80 2.81 0.36
90 2.16 2.31 6.94
表 2  抱杆标准节整体体型系数对比
平臂姿态 $\theta $/（°） Cx 误差/% Cy 误差/%
文献[18] 风洞试验 文献[18] 风洞试验
0° 0 2.23 2.26 ?1.33 0 ?0.03
0° 45.0 1.71 1.89 ?9.52 1.56 1.68 ?7.14
0° 90.0 0 0.23 1.90 1.72 10.47
22.5° 22.5 2.07 2.13 ?2.82 0.92 1.04 ?11.54
22.5° 67.5 0.93 1.02 ?8.82 1.83 2.26 ?19.03
22.5° 112.5 ?0.79 ?0.53 49.06 1.76 1.81 2.76
45° 45.0 1.79 1.58 13.29 1.79 1.90 ?5.79
45° 90.0 0.11 0.17 ?35.29 2.02 2.24 ?9.82
45° 135.0 ?1.55 ?1.14 35.96 1.55 1.41 9.93
表 3  双平臂抱杆结构整体风力系数对比
图 5  抱杆施工全过程典型工况示意图
图 6  抱杆结构风荷载加载点示意图
图 7  0°风向角下抱杆顶部标准节风荷载时程
图 8  0°风向角下抱杆平臂及以上结构风荷载时程
图 9  双平臂抱杆带腰环拉索有限元模型
图 10  双平臂抱杆4个工况下的自振频率
图 11  双平臂抱杆工况4的前3阶振型示意图
图 12  45°风向角4种工况下抱杆关键部位位移
Z/m β1 β2
0° 45°x向 45°y向 0° 45°x向 45°y向
364.7 1.41 1.36 1.32 1.37 1.01 1.02
370.8 1.51 1.46 1.47 1.21 1.06 1.02
376.9 1.74 1.60 1.60 1.71 1.13 1.14
383 2.20 1.82 1.80 2.02 1.37 1.34
389 2.42 2.03 2.00 2.29 1.61 1.69
396.2 2.62 2.23 2.26 2.62 1.81 1.82
403.4 2.85 2.35 2.36 2.84 2.15 2.01
410.5 2.92 2.46 2.50 2.89 2.18 2.05
417.8 2.99 2.51 2.52 2.92 2.18 2.11
424.8 3.08 2.56 2.60 2.95 2.20 2.21
432.2 3.17 2.62 2.67 3.05 2.24 2.28
表 4  双平臂抱杆结构工况4风振系数对比
图 13  4种施工工况在0°风向角下抱杆风振系数对比
图 14  4种施工工况在45°风向角下抱杆风振系数对比
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