| CFRP体外预应力加固钢筋混凝土T型梁试验 |
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| 引用本文： | 陈小英,李唐宁,黄音,陈明政.CFRP体外预应力加固钢筋混凝土T型梁试验[J].中国公路学报,2010(2). |
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| 作者姓名： | 陈小英 李唐宁 黄音 陈明政 |
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| 作者单位： | 重庆大学土木工程学院;重庆科技学院建筑工程学院; |
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| 基金项目： | 重庆市自然科学基金项目(CSTC2008BB6181); 重庆大学研究生科技创新基金项目(200603Y1B0100153) |
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| 摘 要： | 利用波形齿锚具实现横向张拉CFRP片材的体外预应力加固技术,对4根完全相同的7 m跨度的T型梁进行加固(梁侧加固3根梁,其中1根梁考虑二次受力影响;梁底加固1根梁);利用普通粘贴CFRP的加固技术对另一根梁进行加固(加固前与前4根梁完全相同);然后对加固后的5根梁进行试验研究。结果表明:梁侧或梁底CFRP片材体外预应力加固能同时显著提高混凝土梁的开裂荷载、屈服荷载、极限承载力以及截面刚度,能有效限制混凝土裂缝宽度的发展,也能充分发挥CFRP片材高强性能,同时加固时有无初始荷载即二次受力对加固后的梁在承载力及变形能力方面均无明显影响。
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| 关 键 词： | 桥梁工程 钢筋混凝土T型梁 试验研究 波形齿锚具 预应力 CFRP片材 |
Experiment on Reinforced Concrete T-beams Strengthened with External Prestressed CFRP Sheets |
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| CHEN Xiao-ying,LI Tang-ning,HUANG Yin,CHEN Ming-zheng.Experiment on Reinforced Concrete T-beams Strengthened with External Prestressed CFRP Sheets[J].China Journal of Highway and Transport,2010(2). |
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| Authors: | CHEN Xiao-ying LI Tang-ning HUANG Yin CHEN Ming-zheng |
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| Institution: | CHEN Xiao-ying1,2,LI Tang-ning1,HUANG Yin1,CHEN Ming-zheng2 (1.School of Civil Engineering,Chongqing University,Chongqing 400045,China,2.School of Civil Engineering , Architecture,Chongqing University of Science & Technology,Chongqing 401331,China) |
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| Abstract: | The external prestressed strengthening technique is that carbon fiber reinforced polymer(CFRP) sheet is not affixed to the beam and lateral is pulled by wave-shaped-gear(WSG) anchor and grip at two sides or bottom of the beam.Four same 7 m long reinforced concrete T-beams were designed to test.Three beams were strengthened at two sides of the beam by above strengthening technique.One beam is strengthened at bottom of the beam by above strengthening technique.But another beam was strengthened by sticky CFRP ... |
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| Keywords: | bridge engineering reinforced concrete T-beam experimental research wave-shaped-gear anchor prestress CFRP sheet |
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