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（1 清華大學(xué)土木工程系土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室， 北京 100084;2 廣東百安力輕鋼結(jié)構(gòu)產(chǎn)品有限公司， 珠海 519040）

［摘要］建筑工程中新型閉口壓型鋼板組合樓板使用逐漸增加，采用耐火鋼的組合樓板具有更優(yōu)良的抗火性能。利用ABAQUS建立了閉口壓型鋼板組合樓板的非線性抗火計(jì)算模型，通過(guò)與已有試驗(yàn)結(jié)果對(duì)比驗(yàn)證了其抗火分析計(jì)算的準(zhǔn)確性和有效性，在此基礎(chǔ)上對(duì)閉口壓型鋼板組合樓板的抗火性能進(jìn)行參數(shù)分析，考慮了混凝土及鋼材材料強(qiáng)度、樓板及壓型鋼板厚度、鋼材耐火性、樓面荷載等因素的影響。分析計(jì)算表明，采用閉口壓型鋼板的組合樓板可顯著提高其耐火時(shí)間，采用耐火鋼材后耐火時(shí)間可進(jìn)一步提高10%左右；提出了適用于閉口壓型鋼板組合樓板的溫度場(chǎng)計(jì)算公式和抗火性能計(jì)算方法，以及采用耐火鋼材后的耐火時(shí)間修正公式。

［關(guān)鍵詞］耐火鋼； 閉口壓型鋼板； 組合樓板； 抗火性能； 設(shè)計(jì)方法

中圖分類號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)01-0010-08

Study on influencing factors of fire resistant performance of new\|type closed profiled steel plate composite slab 

Shi Yongjiu1， Yang Chenkang1， Peng Yaoguang2， Lin Kunjian2

(1 Department of Civil Engineering and Key Laboratory of Civil Engineering  Safety and Duration of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 Guangdong P&L Steel Product Ltd., Zhuhai 519040， China)

Abstract:The use of new-type closed profiled steel composite slabs in construction projects is gradually increasing, and the composite slabs with fire-resistant steel have better fire resistance performance. A non-linear fire-resistant calculation model of closed profiled steel plate composite slab was established by ABAQUS. The accuracy and validity of the fire-resistant analysis and calculation were verified by comparing with the experimental results. On this basis, the fire-resistant performance of closed profiled steel plate composite slab was analyzed by parameters, taking into account the influences of strength of concrete and steel materials, thickness of slab and profiled steel plate, fire resistance of steel, floor load. The analysis and calculation show that the composite slab with closed profiled steel sheet can significantly improve its fire-resistant time, and the fire-resistant time can be further increased by about 10% after using fire-resistant steel sheet. The formulas for calculating temperature field and  caculation method for fire resistance performance of composite slabs with closed profiled steel sheets were presented, and the modified formulas for fire resistance time of composite slabs with fire-resistant steel sheets were also proposed.

Keywords:fire-resistant steel; closed profiled steel sheet; composite slab; fire resistance performance; design method

*國(guó)家重點(diǎn)研發(fā)計(jì)劃專項(xiàng)項(xiàng)目資助（2017YFC0703401）。

作者簡(jiǎn)介：石永久，博士，教授，博士生導(dǎo)師，Email:shiyj@tsinghua.edu.cn。