- 摘 要
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李鳳蘭 胡志遠(yuǎn)(華北水利水電學(xué)院 鄭州 450008)孫曉燕 (大連理工大學(xué)海岸與近海工程國家重點實驗室 116023)
[提要] 根據(jù)17根鋼纖維混凝土強(qiáng)度等級為CF65~CF90的鋼纖維高強(qiáng)混凝土無腹筋梁的受力性能試驗結(jié)果,分析了鋼纖維體積率變化對鋼纖維高強(qiáng)混凝土梁裂縫分布形態(tài)及破壞特征的影響規(guī)律,驗證了鋼纖維對高強(qiáng)混凝土梁裂縫發(fā)生與發(fā)展的有效約束作用及對斜截面破壞形態(tài)的改善作用。經(jīng)過統(tǒng)計分析,提出了鋼纖維高強(qiáng)混凝土梁斜截面抗裂和斜截面承載力計算方法,供修訂《纖維混凝土結(jié)構(gòu)技術(shù)規(guī)程》參考。
[關(guān)鍵詞] 結(jié)構(gòu)工程 試驗研究 鋼纖維高強(qiáng)混凝土 梁A test program has been performed to study the shear behaviors of the steel fiber reinforced high-strength concrete beams. Seventeen beams without stirrups were made of CF65 to CF90 concrete. Based on the test results,the effects of steel fiber on the occurrence and elongation of cracks, the crack states and the failure characteristics of reinforced high-strength concrete beams are analyzed. The methods are proposed for calculating the shear-cracking strength and the shear resistance of the beams.It can be used as a research basis for revising the contents of the Technical Specification for Fiber Rein forced Con:crete Structures.
Keywords: structure engineering; experimental study; steel fiber reinforced high-strength concrete; beam參 考 文 獻(xiàn)
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