Fiber reinforced composite rib/ cable anchorage

Abstract

The invention discloses a fiber reinforced composite rib / cable anchorage which comprises an anchor shell used for anchoring an FRP(Fiber Reinforced Plastic) rib / cable; a conical through hole is coaxially arranged inside the anchor shell; the fiber reinforced composite rib / cable anchorage is characterized in that a sleeve assembly which matches with the conical through hole and is equipped with the FRP rib / cable is embedded in the conical through hole; a seal cap is fixedly arranged at the end part of the anchor shell; and the diameter of the conical through hole increases from the free end to the load-bearing end of the anchor shell. The fiber reinforced composite rib / cable anchorage has the advantages that the stress of the anchoring area is fundamentally changed and tends to be more reasonable; the size of the anchorage is greatly reduced; the stress on the surface of the FRP rib / cable at the anchoring area increases from the load-bearing end to the free end, so the damage caused by centralized stress at the surface of the FRP rib / cable at the load-bearing end can be avoided; the peak value of the binding powder between a binding medium in the anchoring area and the binding interface of the FRP rib / cable comes out at the free end, so the anchoring efficiency is greatly improved, with the anchoring efficiency coefficient reaching 100%; and the fiber reinforced composite rib / cable anchorage has good durability.

Description

technical field [0001] The invention relates to an anchor, in particular to a fiber-reinforced composite tendon / cable anchor. Background technique [0002] Fiber reinforced polymer (FRP) is a high-performance new material formed by mixing fiber composite material and matrix material in a certain proportion and compounding through a certain process. In recent years, due to its advantages of high strength, light weight, and corrosion resistance, FRP has been applied in civil and architectural engineering structures, and has attracted extensive attention from the engineering community. FRP can be used as cables and slings in large-span cable support structures and suspension structures, and can also be used as main cables and slings in suspension structures, and has been widely used in civil engineering. [0003] Most of the existing anchors for FRP tendons / cables use inner cone anchors to anchor FRP tendons / cables. The inner cone anchors are coaxially provided with tapered th...

AI Technical Summary

Problems solved by technology

However, the diameter of the tapered through hole of this type of anchorage is distributed from small to large from the loaded end of the anchor tube to the free end, so that the compressive stress on the surface of the FRP tendon / cable in the anchorage area increases from the free end (corresponding to the large diameter of the tapered through hole end) to the load-bearing end (corresponding to the small-diameter end of the tapered through hole) is distributed from small to large, causing the bonding force of the anchorage area to be mainly distributed in the front part of the anchorage system (the part near the load-bearing end), so that the load The phenomenon of compressive stress concentration on the surface of the FRP tendons / cables at the load end is very common, and it is easy to cause premature damage to the FRP tendons / cables at the load-bearing end and lead to the phenomenon that the FRP tendons / cables enter the failure state in advance, so that the FRP tendons / cables cannot be The design strength is fully developed, so this kind of anchor has the problems of unreasonable internal force and low anchoring efficiency; and the existing anchorage is too large due to the unreasonable force of the FRP tendon / cable in the anchorage area , resulting in an increase in production costs, which is not conducive to assembly and high maintenance costs in the later period; in addition, none of the existing anchors have anti-corrosion functions, resulting in poor durability of the anchoring system

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