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(武警學(xué)院消防工程系，廊坊 065000)
［摘要］對(duì)工字鋼短柱在軸向約束的情況下進(jìn)行了高溫強(qiáng)度試驗(yàn)。研究結(jié)果表明，在彈性階段，溫度越高，增加的溫度應(yīng)力越大，溫度應(yīng)力的增量只與溫度的增量有關(guān)，而與初始載荷無(wú)關(guān)。在超靜定結(jié)構(gòu)中，溫度應(yīng)力是導(dǎo)致構(gòu)件屈服破壞的主要原因，因此鋼結(jié)構(gòu)的耐火設(shè)計(jì)應(yīng)該考慮溫度應(yīng)力的影響。
［關(guān)鍵詞］工字鋼短柱；軸向約束；溫度應(yīng)力；屈服破壞
Experimental study of temperature stress effect on steel structureLi Huanqun, Qü Lijun
(Department of Fire Engineering, College of Armed Policeman, Langfang 065000, China)
Abstract:Experiment was carried on the Iprofile short column with axial restrained at high temperature. The results show that the temperature stress increment only relates to the temperature increment in the elasticity state, and it is independent of the original stress value. It is the temperat
ure stress that the main reason to make the steel structure yielding failure in the statically indeterminate structure.So it is necessary to take the temperature stress into account when designing for fire resistant.
Keywords:I-profile short column； axial-restrain； temperature stress； yield failure
作者簡(jiǎn)介：李煥群，講師，Email:lihuanqun_wjxy@126.com。
參考文獻(xiàn)
［1］趙金城. 高溫下鋼材力學(xué)性能的試驗(yàn)研究［J］.建筑結(jié)構(gòu)，2000，30(4).
［2］李國(guó)強(qiáng)，蔣首超，林桂祥. 鋼結(jié)構(gòu)抗火計(jì)算與設(shè)計(jì)［M］.北京：中國(guó)建筑工業(yè)出版社，1999.
［3］揚(yáng)宜科，吳天祿，朱景鵬. 金屬高溫強(qiáng)度及試驗(yàn)［M］.北京：冶金工業(yè)出版社，1979.