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（1 天津大學(xué)建筑工程學(xué)院， 天津 300072；
2 濱海土木工程結(jié)構(gòu)與安全教育部重點(diǎn)實(shí)驗(yàn)室， 天津 300072）
［摘要］現(xiàn)行《建筑結(jié)構(gòu)荷載規(guī)范》（GB 50009—2012）（簡稱荷載規(guī)范）的基本氣溫主要針對熱傳導(dǎo)性能較差的混凝土，根據(jù)月平均極值溫度確定，但是對于熱傳導(dǎo)較好的鋼結(jié)構(gòu),基本溫度應(yīng)根據(jù)年極值溫度統(tǒng)計(jì)確定。以全國631個(gè)氣象臺1951年以來的年極值氣溫為樣本，假定服從極值I型分布，統(tǒng)計(jì)確定了各地區(qū)的基本溫度。與荷載規(guī)范進(jìn)行了對比，建議對于鋼結(jié)構(gòu)進(jìn)行荷載取值時(shí)將現(xiàn)行荷載規(guī)范相應(yīng)地區(qū)基本氣溫提高到1-36倍使用。荷載規(guī)范中的風(fēng)溫組合系數(shù)是基于經(jīng)驗(yàn)確定的，未考慮荷載間的相互影響。根據(jù)全國主要地區(qū)風(fēng)速和溫度的歷史數(shù)據(jù)，分析不同跨度、矢高和剛度的單層網(wǎng)殼結(jié)構(gòu)的風(fēng)溫組合系數(shù)。結(jié)果表明風(fēng)、溫度的組合系數(shù)均需一定程度的提高，以保證結(jié)構(gòu)服役期安全，給荷載規(guī)范的修訂提供參考。
［關(guān)鍵詞］鋼結(jié)構(gòu)； 基本溫度； 年極值氣溫； 風(fēng)溫荷載組合系數(shù)
中圖分類號：TU312+.1文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2017)13-0057-06
Study on basic temperature and combined coefficient of wind and temperature loads for steel structure
Guo Yan1, Liu Hongbo1,2, Wang Xiaodun1, Chen Zhihua1,2
(1 Department of Civil Engineering,Tianjin University, Tianjin 300072, China; 2 Tianjin Key Laboratory
of Civil Engineering Stucture & New Materials, Tianjin University, Tianjin 300072, China)
Abstract:The basic temperature of the existing Load code for the design of building structures(GB 50009—2012) (referred to as the load specification) is mainly for concrete with poor heat conduction performance, which is determined according to the monthly mean extreme temperature, but the basic temperature for the steel structure with better heat conduction should be determined by annual extreme temperature statistics. Taking the annual extreme temperature of 631 meteorological stations since 1951 as the sample, it was assumed to follow extreme temperature type I distribution, and the basic temperature of each region was determined statistically. Compared with the load specification, it was recommended that the temperature value of the steel structure should be increased to 1-36 times of the basic temperature value in corresponding region in load specification. The combined coefficient of wind and temperature loads in the load specification is determined based on experience and does not take into account the interaction between loads. Based on the historical data of wind speed and temperature in the main areas of China, combined coefficient of wind and temperature loads of single-layer reticulated shell with different spans, vector heights and stiffness were analyzed. The results show that the combined coefficient of wind and temperature loads needs to be improved to a certain extent to ensure the safety of the structure in service life, which provides reference for the revision of the load specification.
Keywords:steel structure; basic temperature; annual extreme temperature; combined coefficient of wind and temperature loads
*國家自然科學(xué)基金（51208355），中國博士后科學(xué)基金特別資助（2013T60253）。
作者簡介：郭妍，碩士研究生，Email: guo_yan123@yeah.net。
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