CFRP网格加固受损盾构隧道模型试验研究（英文）

发布时间：2018-01-04 02:13

本文关键词：CFRP网格加固受损盾构隧道模型试验研究（英文）　出处：《Journal of Southeast University(English Edition)》2017年02期 　论文类型：期刊论文

【摘要】：对碳纤维增强树脂(CFRP)网格加固受损缩尺盾构隧道模型的有效性进行了试验研究.首先,对CFRP网格与混凝土表面采用不同粘结材料和表面处理方式时的粘结性能进行了研究.采用最有效的锚固方式对随后的缩尺隧道进行了加固.研究结果表明,采用环氧结构胶作为粘结材料时,粘结试验均表现为网格材料破坏,粘结锚固性能最优;而采用聚合物砂浆锚固时,表面锚栓锚固处理和表面开槽处理均能提高粘结性能,破坏模式为聚合物砂浆剥落的滑移破坏.受损隧道模型采用CFRP网格加固后,刚度和承载力都得到了明显提升.此外,FBG的测试结果表明,加固后的隧道环缝应变减小,隧道整体性能得到提升.
[Abstract]:The carbon fiber reinforced epoxy resin (CFRP) mesh reinforcement effectiveness scale damage model of shield tunnel is studied. Firstly, on the bonding properties of CFRP mesh and concrete surface with different bonding materials and surface treatment were studied. The most effective way to scale the anchorage tunnel of the reinforcement. Then the research results show that the epoxy structural adhesive as bonding material, adhesion test showed mesh material damage, bond anchorage performance optimization; and the polymer mortar anchor, anchor bolts of surface treatment and surface treatment can improve the bonding performance of slotting, sliding failure mode for polymer mortar spalling damage. Damage model of the tunnel with CFRP grid reinforcement after the stiffness and bearing capacity are improved. In addition, the FBG test results showed that fracture strain decreases after reinforcement ring tunnel, tunnel Performance has been improved.

【作者单位】：广东电网有限责任公司电力科学研究院;东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：The Science and Technology Project of China Southern Pow er Grid Co.,Ltd.(No.GDKJ00000030) the National Key Technology R&D Program of China(No.2016YFC0701400) the National Natural Science Foundation of China(No.51525801)
【分类号】：U457.3
【正文快照】： Fiber reinforced polymers(FRPs)in the form of bars,sheets,and plates have been w idely used in thestrengthening of concrete structures for decades[1].In re-cent years,FRP grids,as another form of FRP materials,have attracted increasing interest from rese

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