大跨度斜拉桥伸缩缝温致位移提取方法对比

U443.31%U448.27; 为准确评估温度引起的伸缩缝纵向变形,基于安庆长江大桥实测数据,采用滑动平均法和离散小波分解法,开展了大跨度斜拉桥伸缩缝温致位移提取方法对比研究.以平滑系数和平均绝对百分比误差为评价指标,比较了滑动平均法和离散小波分解法在不同参数设置下温致位移的提取结果,并利用功率谱密度分析对比了 2类方法选用较优参数时提取温致位移的效果.研究结果表明,采用滑动平均法时,同窗宽下高斯窗的结果明显优于矩形窗.窗口均为高斯窗时,窗宽选取为5～10 min可较好地提取桥梁温致位移.采用离散小波分解法时,分解层数取8或9的温致位移提取结果最佳.当2类方法均采用较优参数时,提取效果相当....

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Published in东南大学学报（自然科学版） Vol. 53; no. 4; pp. 664 - 671
Main Authors 王盛, 陶天友, 王浩
Format Journal Article
LanguageChinese
Published 东南大学混凝土及预应力混凝土结构教育部重点实验室,南京211189 01.07.2023
Subjects
温度
斜拉桥
cable-stayed bridge
位移
提取方法
伸缩缝
temperature
displacement
expansion joint
extraction methods
Online AccessGet full text
ISSN1001-0505
DOI10.3969/j.issn.1001-0505.2023.04.012

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Abstract U443.31%U448.27; 为准确评估温度引起的伸缩缝纵向变形,基于安庆长江大桥实测数据,采用滑动平均法和离散小波分解法,开展了大跨度斜拉桥伸缩缝温致位移提取方法对比研究.以平滑系数和平均绝对百分比误差为评价指标,比较了滑动平均法和离散小波分解法在不同参数设置下温致位移的提取结果,并利用功率谱密度分析对比了 2类方法选用较优参数时提取温致位移的效果.研究结果表明,采用滑动平均法时,同窗宽下高斯窗的结果明显优于矩形窗.窗口均为高斯窗时,窗宽选取为5～10 min可较好地提取桥梁温致位移.采用离散小波分解法时,分解层数取8或9的温致位移提取结果最佳.当2类方法均采用较优参数时,提取效果相当.
AbstractList U443.31%U448.27; 为准确评估温度引起的伸缩缝纵向变形,基于安庆长江大桥实测数据,采用滑动平均法和离散小波分解法,开展了大跨度斜拉桥伸缩缝温致位移提取方法对比研究.以平滑系数和平均绝对百分比误差为评价指标,比较了滑动平均法和离散小波分解法在不同参数设置下温致位移的提取结果,并利用功率谱密度分析对比了 2类方法选用较优参数时提取温致位移的效果.研究结果表明,采用滑动平均法时,同窗宽下高斯窗的结果明显优于矩形窗.窗口均为高斯窗时,窗宽选取为5～10 min可较好地提取桥梁温致位移.采用离散小波分解法时,分解层数取8或9的温致位移提取结果最佳.当2类方法均采用较优参数时,提取效果相当.
Author 王浩
王盛
陶天友
AuthorAffiliation 东南大学混凝土及预应力混凝土结构教育部重点实验室,南京211189
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Tao Tianyou
Wang Hao
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Keywords 温度
斜拉桥
cable-stayed bridge
位移
提取方法
伸缩缝
temperature
displacement
expansion joint
extraction methods
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Snippet U443.31%U448.27; 为准确评估温度引起的伸缩缝纵向变形,基于安庆长江大桥实测数据,采用滑动平均法和离散小波分解法,开展了大跨度斜拉桥伸缩缝温致位移提取方法对比研究.以...
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Title 大跨度斜拉桥伸缩缝温致位移提取方法对比
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