Evaluation method for ultrahigh-strength prestressed anchor bearing plate and spiral rib

Abstract

The invention provides an evaluation method for an ultrahigh-strength pre-stressed anchor bearing plate and a spiral rib. The evaluation method comprises the following steps: S1, manufacturing a testpiece; s2, mounting the test piece on a test bed; s3, calculating the tensile resistance standard value of the steel strand bundle in the anchor bearing plate force transfer test according to each numerical value of the test piece; s4, loading the test piece by using a press machine and recording test data; and S5, after the loading is finished, judging whether the data is qualified or not according to the loading data. According to the evaluation method of the ultrahigh-strength prestressed anchor bearing plate and the spiral rib, in the process, pausing and observation of all levels are conducted, the crack width is read, and whether a test piece meets the normal use limit state requirement of a prestressed structure anchoring area or not is verified so that crack development and the crack width of concrete can be mainly controlled; after the loading force reaches 1.0, the loading force needs to be loaded until the loading force is damaged, and the limit state requirement of the bearing capacity of the test piece is verified, so that the bearing capacity is judged to meet the use requirement, and sufficient safety margin is reserved.

Description

technical field [0001] The invention relates to the field of anchoring devices, in particular to an evaluation method for an ultra-high-strength prestressed anchor plate and a spiral reinforcement. Background technique [0002] Anchorage, also known as prestressed anchorage, is a permanent anchoring device used in prestressed concrete. It is an anchoring tool in a post-tensioned structure or component to maintain the tension of the prestressed tendon and transmit it to the interior of the concrete. Anchorages can be divided into two categories according to the type of use: tension end anchorage and fixed end anchorage. Anchoring tool for the rib to remain anchored. The fixed end anchorage is suitable for the situation where the design stress of the end fabric of the component is large or the space at the end is limited. In the concrete, it is arranged as needed. After the concrete is solidified to the design strength, tensioning is performed. [0003] There is no evaluati...

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Problems solved by technology

[0004] The present invention provides a super high The evaluation method of high-strength prestressed anchor plate and spiral reinforcement solves the above problems by measuring the percentages of the standard values ​​of the tensile strength of the steel strand bundle in the force transmission test of the anchor plate

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