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鈕宏 馬云鳳 姚亞雄
（同濟大學 上海 200092）[提要] 本文對40個粉煤灰陶粒混凝土T形截面柱體，在常溫100℃～900℃范圍內的不同溫度和荷載同時作用下的強度、變形、彈性模量和應力一應變關系等進行了實驗和理論研究工作。探討了試件在高溫和荷載共同作用下的變化規(guī)律，著重分析了不同溫度和荷載共同作用下的破壞特征、強度、極限壓應變、彈性模量和應力一應變關系等方面的影響，采用了合理的模式，經(jīng)過理論分析和推導，建立了簡潔實用的公式，并用計算機分析，表明理論計算與實驗結果符合較好。
[關鍵詞] 輕骨料混凝土 構件 抗火性能This paper studies the material strength, deformation, modulus of elasticity and stress-strain rela-tionship based on the testing specimens which consist of 40 T-type section expanded fly ash concrete respectively under the conditions of normal atmospheric temperature and the temperatures ranging from 100'C t0 900'C combined with various static loads. Emphasis is laid on the analysis of failure characteristics, ultimate compression strain, strength, modulus of clasticity for member and stress -strain relationship under the action of elevated temperatures and loads simultaneously. The proposed calculation formula in this paper can be used in practice and the con/puter employed shows that the calculated results agree fairly with the experiment ones.
Keywords: lightweight aggregate concrete; member; fire resisting
