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（1 東南大學(xué)土木學(xué)院 南京 210096；  2 山東省建設(shè)廳 濟(jì)南 250001）
［提要］ 對(duì)標(biāo)準(zhǔn)火災(zāi)升溫條件下采用YX76344688型鋼承板的組合樓板截面溫度場(chǎng)的分布規(guī)律進(jìn)行了試驗(yàn)研究，并提出了對(duì)截面溫度場(chǎng)進(jìn)行計(jì)算模擬的改進(jìn)的有限差分方法。研究結(jié)果表明，混凝土內(nèi)的水分對(duì)低溫區(qū)混凝土的升溫過程產(chǎn)生很大影響，而改進(jìn)后的有限差分計(jì)算方法可以合理地考慮水分的影響，很好地模擬組合樓板截面在低溫區(qū)和高溫區(qū)的溫度場(chǎng)分布。最后，提出了在不同升溫方式下截面溫度場(chǎng)的實(shí)用分析方法，可供工程防火設(shè)計(jì)時(shí)使用。
［關(guān)鍵詞］ 組合樓板 火災(zāi) 溫度場(chǎng) 試驗(yàn)研究 有限差分法
Experimental Study on the Section Temperature Field of Steel concrete Composite Slabs Under Fire/Han Jinsheng1，Dong Yuli2，Cheng Wenrang1，Xu Zhaodong1，Cong Shuping2(1   Civil Engineering College of Southeast University, Nanjing 210096, China；
2  Shandong Province Construction Bureau, Jinan 250001, China)
Abstract:The section temperature field of YX76344688 profiled steel sheeting composite slabs subjected to standard fire was experimented and an innovative finitedifference method is proposed to simulate the temperature filed. The study results show that the water in the concrete has great effect on the temperature rise process of concrete  in low temperature region.The new improved finitedifference method can consider the effect of the water reasonably and simulate the section temperature field very well both in high and low temperature regions.A practical  method is advanced to analyse the section temperature field in different calefactive manners which can be used in antifire design of structure engineering.
Keywords:composite slabs； fire temperature field； experimental study； finite difference method

*國(guó)家自然科學(xué)基金項(xiàng)目（50178034）、973項(xiàng)目（2001CB4096030）；國(guó)家

自然科學(xué)基金重大國(guó)際合作研究項(xiàng)目（50320120156）；中國(guó)科學(xué)院知識(shí)創(chuàng)新工程項(xiàng)目