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（中國(guó)建筑設(shè)計(jì)研究院 北京 100044）
（大連理工大學(xué)土木水利學(xué)院 116024）
【提要】 通過(guò)25根鋼筋鋼纖維混凝土梁的試驗(yàn)，研究了影響鋼纖維高強(qiáng)混凝土梁在正常使用極限狀態(tài)下裂縫寬度的各種因素。試驗(yàn)結(jié)果證明，在相同的配筋率下，鋼纖維的體積摻率是主要因素。給出了鋼筋鋼纖維高強(qiáng)混凝土受彎構(gòu)件的裂縫寬度計(jì)算公式，計(jì)算結(jié)果與試驗(yàn)結(jié)果符合良好。該公式簡(jiǎn)單實(shí)用，適用于工程計(jì)算，為《纖維混凝土結(jié)構(gòu)技術(shù)規(guī)程》（CECS38:2004）采用。
【關(guān)鍵詞】 鋼纖維混凝土 高強(qiáng)混凝土 梁 受彎 正常使用極限狀態(tài) 裂縫寬度
Investigation on Steel Fiber Reinforced Highstrength Concrete Beams Under Normal Service Conditions/Lin Tao1, Huang Chengkui2 (1 China Architecture Design and Research Group, Beijing 100044, China; 2 School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China)
Abstract:Based on an experimental study on 25 FRC beams,variables that affect the width of cracks in steel fiber reinforced highstrength concrete beams under normal service conditions are studied. It is proved that the fiber content of beams with the same reinforcement ratio is the main factor affecting the testing result. The previous formulas for calculating width of cracks in  FRC members are revised,and the results fit very well with the experimental data. The formulas are handy and applicable in engineering calculating, and are adopted by Technical Specification for Fiber Reinforced Concrete Structures(CECS38:2004).
Keywords:fiber reinforced concrete; highstrength concrete; beams; flexural; normal service conditions; cracks