- 摘 要
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（土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室， 清華大學(xué)土木工程系， 北京 100084）
［摘要］為研究高強(qiáng)鋼軸壓構(gòu)件計(jì)算模式的不定性，總結(jié)了已有文獻(xiàn)關(guān)于高強(qiáng)鋼軸心受壓構(gòu)件的整體穩(wěn)定承載力試驗(yàn)數(shù)據(jù)和有限元數(shù)值計(jì)算結(jié)果，并利用在編的《高強(qiáng)鋼結(jié)構(gòu)設(shè)計(jì)規(guī)程》中的軸心受壓構(gòu)件整體穩(wěn)定承載力計(jì)算公式計(jì)算了整體穩(wěn)定系數(shù)。對這些數(shù)據(jù)采用數(shù)理統(tǒng)計(jì)的方法，分析了高強(qiáng)鋼軸心受壓構(gòu)件整體穩(wěn)定承載力的試驗(yàn)值與理論值、理論值與規(guī)范值差異的不定性，檢驗(yàn)了其服從的概率分布，計(jì)算得到了統(tǒng)計(jì)參數(shù)；在此基礎(chǔ)上，計(jì)算了高強(qiáng)鋼軸心受壓構(gòu)件計(jì)算模式不定性的統(tǒng)計(jì)參數(shù)，為下一步提出高強(qiáng)度鋼材材料設(shè)計(jì)指標(biāo)提供了依據(jù)。
［關(guān)鍵詞］高強(qiáng)鋼; 軸心受壓; 計(jì)算模式不定性; 統(tǒng)計(jì)參數(shù)
中圖分類號：TU391 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)16-0036-05
Research on resistance model uncertainty of high-strength steel axial compression members
Shi Gang, Zhu Xi
(Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China)
Abstract: In order to investigate the resistance model uncertainty of high-strength steel axial compression members, experiment data of overall stability bearing capacity and numerical results from finite element method were summarized. The overall stability coeffcient was calculated by using the overall stability bearing-capacity formula of axial compression members in Specification for design of high-strength steel structures which was being compiled. The differences between experiment values and theoretical values, theoretical values and code values of overall stability bearing capacity of high-strength steel axial compression members had been analyzed by mathematical statistics method. The probability distribution was examined and the statistical parameters were obtained. On this basis, the statistical parameters of resistance model uncertainty of high-strength steel axial compression members have been obtained, which will provide the basis for the design index of high-strength steel.
Keywords: high-strength steel; axial compression; resistance model uncertainty; statistical parameter
*北京高等學(xué)校青年英才計(jì)劃項(xiàng)目(YETP0077)。
作者簡介：施剛，副教授，博士生導(dǎo)師，Email：shigang@tsinghua.edu.cn。
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