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（1 同濟(jì)大學(xué)， 上海 200092； 2 浙江湖州職業(yè)技術(shù)學(xué)院， 湖州 313000；3 慧魚(太倉)建筑錨栓有限公司， 太倉 215400）
［摘要］進(jìn)行了混凝土植筋在落錘沖擊荷載作用后的粘結(jié)錨固性能試驗(yàn)。試件按植筋深度的不同分為4組，每組試件分別進(jìn)行了靜力拉拔試驗(yàn)和5種沖擊加載工況試驗(yàn)，沖擊荷載峰值為同組試件靜力極限拉拔力的0-6～1-5倍，試件在承受沖擊力作用后再進(jìn)行靜力拉拔試驗(yàn)。結(jié)果表明，植筋深度小于臨界錨固長度的試件，承受較大沖擊荷載后試件的承載力即完全喪失，承受較小沖擊荷載后試件的承載力雖未完全喪失，但延性大幅度降低；對于植筋深度相當(dāng)于臨界錨固長度的試件，承受沖擊荷載后試件仍有較大的抗拉拔承載力，但延性降低較大；當(dāng)植筋深度大于臨界錨固長度時(shí)，試件在承受沖擊荷載后仍有良好的抗拉拔承載力和延性。
［關(guān)鍵詞］植筋； 沖擊力； 極限拉拔力； 粘結(jié)錨固
中圖分類號：TU375文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)15-00６0-0５
Experimental research on bonding behavior of concrete bonded rebars after impact loading
Zhang Jianrong1, Xiao Fan2, Liu Bing3, Gao Fei1, Wang Zheng3
(1 Tongji University, Shanghai 200092, China; 2 Huzhou Vocational & Technical College, Huzhou 313000, China; 3 Fischer (Taicang) Fixing Co., Ltd., Taicang 215400, China)
Abstract:After the drop-hammer impact loading, the bonding anchorage behavior test for concrete bonding rebars was conducted. Specimens were divided into four groups according to the embedded depths. The static pullout test and impact loading test for each group were carried out. The peak value of impact load was 0-6~1-5 times as large as the ultimate static pullout force of the specimen in same group. Static pullout test on specimens was conducted after impact loading. The results show that the specimens with the embedded depth less than the critical anchorage length would completely lose the bearing capacity after suffering large impact loading, and the ductility of the specimens reduces significantly, although the impact loading on specimens is not so large and the bearing capacity is not completely lost. For specimens with the embedded depth equivalent to the critical anchorage length, the specimens still have large pullout capacity after bearing impact loading, but the ductility decreases significantly. While the embedded depth is larger than the critical anchorage length, the specimens still have good pullout capacity and ductility after bearing impact loading.
Keywords:bonded rebar; impact force; ultimate pullout force; bonding anchorage
*國家自然科學(xué)基金資助項(xiàng)目（51178329）。
作者簡介：張建榮，教授，博士生導(dǎo)師，Email：zhangjr@#edu.cn。
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