YM15 steel strand anchorage system (YM15 anchorage system) is my company in Luqiao [original China (Group) based YM anchorage system of Xinjin road construction machinery factory] and in highway planning and Design Institute jointly developed, by referencing domestic and foreign advanced steel strand anchorage system, optimize the design of the computer finite element analysis and test, appropriate to reduce the redundancy of strength design, the structure is more compact, still retains the original YM anchorage system "has the advantages of compact structure, convenient operation, safety and labor saving, high efficiency, reliable anchoring characteristics".

The performance of YM15 products comply with international prestressed anchorage system association prepared by the "post tensioning system acceptance and application recommendations > (1993 version, referred to as FIP-93 recommendations), < anchorage for prestressing tendons, fixture and connector (GB/T14370) >, < prestressed reinforcement of Railway Engineering in Anchorage, fixture and connector technology conditions > (TB/T3193) and" highway bridge prestressed strand anchorage, grip and connector > (JT/T329), suitable for anchorage diameter of 1860MPa grade steel wire diameter of 15.2mm, and can be widely used in various large span bridges, industrial buildings and high-rise buildings and other projects, which can be used for bonded prestressed concrete structure, but also can be used for unbonded prestressed concrete the concrete structure.

Technical characteristics and performance index of YM15 anchorage system

1 reliable anchoring, anchoring performance in line with "post tensioning system acceptance and application recommendations > (1993 version, referred to as FIP-93 recommendations), < anchorage for prestressing tendons, fixture and connector (GB/T14370) >, < prestressed reinforcement of Railway Engineering in Anchorage, fixture and connector technical conditions > and < highway (TB/T3193) the bridge of prestressing strand anchorage, fixture and connector (JT/T329), > anchoring strength is 1860MPa level and below strength grade of steel strand.

2 to adapt to the wide range of steel strand, anchorage to 15 ~ 15.7mm in diameter of the steel wire.

3 the size of the prestressed beam can be selected according to the design requirements, in the range of 1 ~ 55 beam, tension can be controlled within 0 ~ 12000kN.

4 clip for two piece structure, anchor tension automatic retraction of anchoring technology.

5 static load anchorage performance

Anchor steel wire assembly anchorage efficiency coefficient a = 95%

Limit strain APU is more than or equal to 2%

6 periodic load performance

Anchor steel wire assembly is loaded into the steel strand standard strength of 80% to 40, and then unloading and reloading%, to 80%, so repeated 50 times, the anchorage parts and steel wire are not damaged.

7 fatigue load performance

Anchorage assembly can withstand 2 million times of cyclic loading, stress amplitude of delta sigma = 80MPa, stress limit of standard strength of steel strand 65%, after the test of anchorage component damage, and the breaking area of steel strand is not more than the original area of 5%.

8 using the automatic retraction anchor tension technology, anchorage Suliang less than 6 mm.

9 anchor anchor mouth friction loss and friction loss of total bell is not greater than 6%.

10, meet the anchorage tension or tension equipment switching need temporary anchorage requirements.

This type of anchorage for post tensioned prestressed concrete structure, the anchor ring, clip, anchor structure and spiral reinforcement components.

1) with prestressed reinforcement of Railway Engineering for railway "anchorage, grip and coupler technology conditions > (TB/T3193) structure of square anchor:

2) applicable to the beam body layout space of the small circular anchor structure combination: