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    楊建平  時(shí)旭東  過鎮(zhèn)海
    （清華大學(xué) 北京 100084）

[提要]  進(jìn)行了9根兩面高溫的鋼筋混凝土偏心受壓構(gòu)件的試驗(yàn)。結(jié)果表明，不均勻高溫下的鋼筋混凝土偏心受壓構(gòu)件的極限承載力并不一定隨偏心距的增加而下降，而是存在一個(gè)偏心距不等于零卻有最大承載力的極強(qiáng)偏心距點(diǎn)，此點(diǎn)兩側(cè)隨偏心距的增加構(gòu)件的極限承載力下降。文中還給出了構(gòu)件的各種表觀現(xiàn)象、破壞形態(tài)、側(cè)向撓度和軸向變形等性能隨試驗(yàn)溫度的變化規(guī)律。
[關(guān)鍵詞]  高溫 鋼筋混凝土 偏心受壓構(gòu)件 極限承載力 變形

This article reports an experiment of 9 reinforced concrete members with flexure and axial load and heated on two-surfaces .The result indicates that the ultimate loads of these members may not drop with the increase of eccentricity. However, there is a strongest eccentricity point that has highest ultimate loads, but its eccentricity is not zero. The ultimate load decreases with increase of eccentricity from this point. The varying law of all kinds of apparent appearance, failure pattern, displacement and axial distortion with the increase of experimental temperature are given.
Keywords: high  temperature; reinforced concrete; ultimate load; distortion; eccentric compression member