Cable-stayed bridges have been widely used in high-speed railway infrastructure.The accurate determination of cable’s representative temperatures is vital during the intricate processes of design,construction,and mai...Cable-stayed bridges have been widely used in high-speed railway infrastructure.The accurate determination of cable’s representative temperatures is vital during the intricate processes of design,construction,and maintenance of cable-stayed bridges.However,the representative temperatures of stayed cables are not specified in the existing design codes.To address this issue,this study investigates the distribution of the cable temperature and determinates its representative temperature.First,an experimental investigation,spanning over a period of one year,was carried out near the bridge site to obtain the temperature data.According to the statistical analysis of the measured data,it reveals that the temperature distribution is generally uniform along the cable cross-section without significant temperature gradient.Then,based on the limited data,the Monte Carlo,the gradient boosted regression trees(GBRT),and univariate linear regression(ULR)methods are employed to predict the cable’s representative temperature throughout the service life.These methods effectively overcome the limitations of insufficient monitoring data and accurately predict the representative temperature of the cables.However,each method has its own advantages and limitations in terms of applicability and accuracy.A comprehensive evaluation of the performance of these methods is conducted,and practical recommendations are provided for their application.The proposed methods and representative temperatures provide a good basis for the operation and maintenance of in-service long-span cable-stayed bridges.展开更多
背景:现如今由运动损伤或车辆创伤引起的后交叉韧带损伤比人们想象的更常见,后交叉韧带重建是其主要治疗方式之一,而目前后交叉韧带重建的手术方式和韧带选择尚存在大量争议。目的:全面分析全球后交叉韧带重建的应用趋势,并基于文献计...背景:现如今由运动损伤或车辆创伤引起的后交叉韧带损伤比人们想象的更常见,后交叉韧带重建是其主要治疗方式之一,而目前后交叉韧带重建的手术方式和韧带选择尚存在大量争议。目的:全面分析全球后交叉韧带重建的应用趋势,并基于文献计量学和视觉分析确定有前景的后交叉韧带重建研究热点。方法:从Web of Science数据库(WOS)中检索了2000-2022年与后交叉韧带重建相关的出版物(文章和评论),提取并详细分析了国家、机构、出版年份、作者、期刊、每篇文章的平均引用率、H指数、标题、出版物的关键词以及被引用次数最多的25篇文章。利用VOSviewer/citespace/Pajek软件分析关键词的共现结果,预测后交叉韧带重建的热点。结果与结论:共纳入664篇文章。①在过去的22年里,后交叉韧带重建文章的数量总体上呈上升趋势。前3个国家(美国、中国和韩国)占所有发表文章的65.51%,美国的文章数量最多。University of Pittsburgh是最大的贡献者。《Knee Surgery Sports Traumatol Arthrosc》和《American Journal of Sports Medicine》是最有影响力的杂志。Laprade,Robert F是在后交叉韧带重建领域发文量最多的教授,Fanelli,GC是在后交叉韧带重建领域总链强度最高的教授。②研究方向可分为以下5个组别:“后交叉韧带解剖及生物力学研究”“后交叉韧带重建的预后、结果和并发症”“后交叉韧带重建方式与肌腱选择”“手术技术”和“后交叉韧带撕裂联合多韧带损伤”。③提示:从往年的趋势来看,未来将有越来越多与后交叉韧带重建有关的文献发表。在后交叉韧带重建领域,美国处于世界领先地位,中国和韩国则呈现出巨大的潜力。后交叉韧带解剖及生物力学研究、后交叉韧带重建方式与肌腱选择、后交叉韧带撕裂联合多韧带损伤可能是未来后交叉韧带重建研究领域的热点。展开更多
基金Project(2017G006-N)supported by the Project of Science and Technology Research and Development Program of China Railway Corporation。
文摘Cable-stayed bridges have been widely used in high-speed railway infrastructure.The accurate determination of cable’s representative temperatures is vital during the intricate processes of design,construction,and maintenance of cable-stayed bridges.However,the representative temperatures of stayed cables are not specified in the existing design codes.To address this issue,this study investigates the distribution of the cable temperature and determinates its representative temperature.First,an experimental investigation,spanning over a period of one year,was carried out near the bridge site to obtain the temperature data.According to the statistical analysis of the measured data,it reveals that the temperature distribution is generally uniform along the cable cross-section without significant temperature gradient.Then,based on the limited data,the Monte Carlo,the gradient boosted regression trees(GBRT),and univariate linear regression(ULR)methods are employed to predict the cable’s representative temperature throughout the service life.These methods effectively overcome the limitations of insufficient monitoring data and accurately predict the representative temperature of the cables.However,each method has its own advantages and limitations in terms of applicability and accuracy.A comprehensive evaluation of the performance of these methods is conducted,and practical recommendations are provided for their application.The proposed methods and representative temperatures provide a good basis for the operation and maintenance of in-service long-span cable-stayed bridges.
文摘背景:现如今由运动损伤或车辆创伤引起的后交叉韧带损伤比人们想象的更常见,后交叉韧带重建是其主要治疗方式之一,而目前后交叉韧带重建的手术方式和韧带选择尚存在大量争议。目的:全面分析全球后交叉韧带重建的应用趋势,并基于文献计量学和视觉分析确定有前景的后交叉韧带重建研究热点。方法:从Web of Science数据库(WOS)中检索了2000-2022年与后交叉韧带重建相关的出版物(文章和评论),提取并详细分析了国家、机构、出版年份、作者、期刊、每篇文章的平均引用率、H指数、标题、出版物的关键词以及被引用次数最多的25篇文章。利用VOSviewer/citespace/Pajek软件分析关键词的共现结果,预测后交叉韧带重建的热点。结果与结论:共纳入664篇文章。①在过去的22年里,后交叉韧带重建文章的数量总体上呈上升趋势。前3个国家(美国、中国和韩国)占所有发表文章的65.51%,美国的文章数量最多。University of Pittsburgh是最大的贡献者。《Knee Surgery Sports Traumatol Arthrosc》和《American Journal of Sports Medicine》是最有影响力的杂志。Laprade,Robert F是在后交叉韧带重建领域发文量最多的教授,Fanelli,GC是在后交叉韧带重建领域总链强度最高的教授。②研究方向可分为以下5个组别:“后交叉韧带解剖及生物力学研究”“后交叉韧带重建的预后、结果和并发症”“后交叉韧带重建方式与肌腱选择”“手术技术”和“后交叉韧带撕裂联合多韧带损伤”。③提示:从往年的趋势来看,未来将有越来越多与后交叉韧带重建有关的文献发表。在后交叉韧带重建领域,美国处于世界领先地位,中国和韩国则呈现出巨大的潜力。后交叉韧带解剖及生物力学研究、后交叉韧带重建方式与肌腱选择、后交叉韧带撕裂联合多韧带损伤可能是未来后交叉韧带重建研究领域的热点。
