EXPERIMENTAL AND ANALYTICAL STUDIES ON PEELING BEHAVIOR AND SPALLING RESISTANCE EFFECT OF EXTERNALLY BONDED CONTINUOUS FIBER SHEETS

WU Zhishen, ASAKURA Toshihiro, YOSHIZAWA Hiroyuki, YUAN Hong, KOBAYASHI Akira, TAKAHASHI Touru

doi:10.2208/jscej.2000.662_45

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連続繊維シートの貼付によるコンクリート片の剥落防止効果に関する実験的・解析的研究
レンゾクセンイシートノチョウフニヨルコンクリートヘンノハクラクボウシコウカニカンスルジッケンテキカイセキテキケンキュウ

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Abstract

In this paper, the peeling behavior and the spalling resistance effect of externally bonded continuous fiber sheets (CFS) were firstly investigated experimentally through a series of punching shear tests. CFS applied concrete slabs with a hole in center were used for the test specimens. Specimens were varied in scale of slabs, layers and their fiber directions of CFS, diameters of spalling columnar concrete. It was found from the experiments that the maximum load of punching shear with bonded orthogonal two layers of CFS was extremely higher than the case of one layer of CFS.<br>Secondly, a fracture energy method was proposed for modeling the membrane peeling behavior and for evaluating spalling resistance effect of externally bonded CFS. It is realized that only one material parameter, interfacial fracture energy G_c along CFS-concrete interface, was necessary to represent the interfacial behavior. Finally, the close agreement between the predicted results from the proposed analytical method and the experimental results was demonstrated by means of some numerical examples.

Journal

Doboku Gakkai Ronbunshu

Doboku Gakkai Ronbunshu 2000 (662), 45-58, 2000-11-20

Japan Society of Civil Engineers

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