Oriental Shiraishi Corporation

Tokyo Rope Mfg. Co., Ltd.

Tokyo Rope Manufacturing Co., Ltd.

Meguru Tsunomoto

Toru Tanaka

Yoshihiro Tanaka

Eiji Koda

Hiroshi Watase

Tomohiro Ishii

Hiroshi Masuya

A concrete structure includes a continuous fiber-reinforced polymer material arranged as a main reinforcing material or a tendon. A short fiber reinforcing material consisting of an organic fiber is mixed in 0.5% or more with respect to an entire volume. The continuous fiber-reinforced polymer material is shaped like a rod or a stranded wire. A ratio Lf/Gm between a fiber length Lf of the organic fiber of the short fiber reinforcing material and a maximum aggregate diameter Gm of a concrete composition is 1.2 to 3.7, and an aspect ratio Lf/De, in which De is an equivalent diameter that is a cross-sectional area of the organic fiber converted into a circle diameter, is 30 to 69.

Short fiber-reinforced concrete structure using continuous fiber-reinforced polymer material

In an anchorage () of continuous fiber-reinforced polymer (CFRP) strands that anchors continuous fiber-reinforced polymer strands () to concrete structures, there is provided an untwisted diameter-expanded portion () expanded to a diameter Dby being radially expanded with respect to a diameter Dof a general portion () of the CFRP strands () by untwisting any section of the CFRP strands () formed by stranding a plurality of element wires () that are bundles of multiple continuous fibers, and filling and curing a time curable material () in a clearance among the element wires the untwisted section that is untwisted.

Anchorage of continuous fiber-reinforced polymer strands

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Tokyo, Japan

Meguru Tsunomoto