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Experimental Study on Anchor of Prestressed CFRP Sheet

Author: HuangTao
Tutor: QuanXueYou
School: Chongqing University
Course: Structural Engineering
Keywords: CFRP Prestressed Anchor Anchoring Force Anchoring Mechanism
CLC: TU757.2
Type: Master's thesis
Year: 2009
Downloads: 67
Quote: 1
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Abstract


There are many problems when strengthening RC beams by pasting ordinary carbon fibers reinforced polymer directly. It can’t be taken full advantage of the CFRP’s high strength performance. And it can’t improve the performance under normal service conditions of the component. In order to solve the above problems, the best way is to impose the prestressed on the CFRP materials. The prestressed CFRP reinforcement system can play the CFRP’s high strength performance much better. The group is committed to research and development of a set of prestressed CFRP reinforcement plate anchor system which could be used in the field of structural reinforcement. The purpose of this paper is to design that which can achieve the practical requirements of prestressed CFRP plate anchor.During the long research progress, Throughout the whole design, there were a total of five different forms of anchor and there were 11 tests of the anchoring force had been done. Finally, the curvilinear anchor with tiny teeth had achieved our target. After analyzing the test results, we have had the following conclusions:①The anchor relies on the adhesive shear stress to deliver the CFRP plate’s rally, which made the anchor to be fixed. The form of the anchor’s destruction is slip failure.②The uneven adhesive interface stress and the accumulated stress in the end are the main reason of the slip failure.③The profile interface can give full play to the adhesive shear stress and improve the anchor anchoring force.④When have the same adhesive shear strength, take the curvilinear anchor can stop the slip failure effectively and achieve anchoring.The above conclusion is based on 11 tests and theoretical analysis. The understanding of the anchoring mechanism, adhesive force characteristics and failure criterion is still relatively superficial. Although a fine analysis of the anchor is still a lack of theoretical support, the macro-sense rules of the real problem have been captured. It has been provided the test and theoretical basis for the further study.

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CLC: > Industrial Technology > Building Science > Construction > The project and the type of work > Prestressed reinforced concrete structures projects > Prestressing tendons anchoring and fixture
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