+Advanced Search 中文版
Load transfer test of prestressed reinforcement anchorage zone -- Discussion on safety of prestressed anchorage zone II
Author:
Affiliation:

(China Academy of Building Research, Beijing 100013)

Clc Number:

TU378

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    How to determine the bearing capacity of the prestressed reinforcement anchorage area is a problem that has long been of great concern to the domestic and foreign industry. Foreign technical standards require the test method of applying pressure to the test pieces to verify. In China, the practice is that the embedded parts and anti-cracking steel bars within the concrete structure are designed by the structural designer, and the anchors outside the structure are designed by the anchor manufacturers. However, the whole set of clip-type anchors contains the anchors outside the structure and the supporting parts in the structure, resulting in an unclear situation. Since October 2010, China's industry standard JGJ85-2010 "Technical Regulations for the Application of anchors, fixtures and connectors for prestressed tendons" first proposed that when entering the acceptance of anchors, if the anchor plate is cast, the anchor manufacturer should conduct the force transfer performance test in the anchoring area, and the structural designer believes that the force transfer performance of the anchoring area can not meet the requirements The test results show that the standard is basically consistent with the acceptance standard of the American Post-tensioning Prestressing Institute (PTI). In March 2011, the Ministry of Communications of China issued the industry standard "Anchors, fixtures and Connectors for Prestressed steel strand wires of Highway Bridges" (JT/T329-2010), requiring that the structural size of the anchor plate should be able to reliably transfer prestress from the anchor to the concrete member. The requirements of this standard are basically the same as those of FIP1993 on load transfer test. However, the Chinese industry is relatively new to the "load transfer test" and does not know much about how to conduct this test. In the future, domestic and foreign projects (such as high-speed rail, high-speed), especially foreign users may require anchor manufacturers to provide this test proof, and anchor manufacturers and structural designers need to face up to it. In this situation, this paper summarizes the test concepts, specimen production, test methods and requirements at home and abroad to provide a general information for the industry.

    Reference
    Related
    Cited by
引用本文

Xiao Pei, Ying Zhu, Qian Chen, Chengshun Zhou, Li Zeng Load transfer test of prestressed reinforcement anchorage zone -- Discussion on safety of prestressed anchorage zone II. Prestress Technology 2012,16(02):14-20. 10.59238/j. pt.2012.02.004

复制
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:
  • Revised:
  • Adopted:
  • Online: August 06,2023
  • Published: