| CFRP-混凝土界面4ENF断裂试验研究 |
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| 引用本文： | 陈瑛,乔丕忠.CFRP-混凝土界面4ENF断裂试验研究[J].河海大学学报(自然科学版),2009,37(1):96-99. |
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| 作者姓名： | 陈瑛 乔丕忠 |
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| 作者单位： | 1. 山东大学土建与水利学院,山东,济南,250061;河海大学土木工程学院,江苏,南京,210098
2. 河海大学土木工程学院,江苏,南京,210098;Department of Civil and Environmental Engineering,Washington State University,Pullman WA 99164-2910,USA |
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| 摘 要： | 为了研究CFRP-混凝土的Ⅱ型和混合型断裂能量释放率(energy release rate,ERR),进行了铝板调整CFRP-混凝土4ENF断裂试验,根据Timoshenko梁(TB)模型、双参数弹性基础上的4点受弯端部切口试件(four-point bending end-notched flexure specimen,4ENF)柔度模型和多亚层柔性节点模型的J积分方法求得了ERR.试验结果表明:在相同的黏接条件下,Ⅱ型或混合型断裂破坏方式有3种:(a)剥离发生在胶层-混凝土界面和界面混凝土上;(b)剥离始于胶层-混凝土界面或界面混凝土且混凝土梁发生破坏;(c)剥离发生在界面混凝土上且混凝土梁发生破坏.Ⅱ型或复合层刚度大于混凝土刚度的混合型断裂试件,可以获得较高的ERR.若复合层刚度小于混凝土层刚度,裂缝始于胶层-混凝土界面,发展到一定长度后沿界面混凝土发展,并导致混凝土发生斜拉破坏,ERR很低.通过试验表明,本4ENF可以有效地对Ⅱ型和混合型CFRP-混凝土界面断裂进行研究.
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| 关 键 词： | 4点受弯端部切口试件 CFRP-混凝土 能量释放率 Ⅱ型断裂 混合型断裂 |
| 修稿时间： | 2009/2/13 0:00:00 |
Fracture tests on CFRP-4ENF interfaces |
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| CHEN Ying,QIAO Pi-zhong.Fracture tests on CFRP-4ENF interfaces[J].Journal of Hohai University (Natural Sciences ),2009,37(1):96-99. |
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| Authors: | CHEN Ying QIAO Pi-zhong |
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| Institution: | 1.School of Civil Engineering;Shandong University;Jinan 250011;China;2.College of Civil Engineering;Hohai University;Nanjing 210098;3.Department of Civil and Environmental Engineering;Washington State University;Pullman WA 99164-2910;USA |
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| Abstract: | Interface fracture tests using aluminum beam-contoured CFRP-concrete four-point bend end-notched flexure(4ENF) specimens(4ENF) were performed to determine the energy release rates(ERR) of mode II and mixed mode fracture.By using the Timoshenko beam model,the double-parameter 4ENF model on elastic foundation,and the J-integration of multi-layer flexible model,the corresponding ERRs were obtained.The test results show that under the same bonding condition,the fracture patterns of the mode II and mixed mode of... |
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| Keywords: | 4ENF specimen CFRP-concrete bonded interface energy release rate mode II fracture mixed mode fracture |
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