Development and Analysis of Unbonded Post-tensioned Anchorage for Single Tendon

Young Hak Lee; Yong Woo Cho; Min Sook Kim

doi:10.7734/COSEIK.2018.31.1.39

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2018 Vol.31, Issue 1 Preview Page Next Page

Development and Analysis of Unbonded Post-tensioned Anchorage for Single Tendon 비부착식 단일 강연선용 포스트텐션 정착구 개발 및 응력해석

2018. pp. 39-46

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Abstract

In this paper, an unbonded post-tensioning anchorage for a single-stranded wire that allows more efficient stress distribution in the post-tensioned anchorage zone was developed by using a finite element analysis using a commercial program. The stress analysis was carried out using a 3D model in the anchorage zone of the concrete member using the developed anchorage. The result of analysis ensured that the developed anchorage reduced the maximum bursting stress in anchorage zone compared to the case of existing anchorage and the location where maximum bursting stress also occurred closer to the anchorage. Bursting force was calculated using AASHTO, modified Mörsch and Stone. As a result, it was concluded that an effective reinforcement design of the anchorage zone can be designed by modified Mörsch.

Keywords

unbonded

single tendon

post-tensioning

anchorage

stress analysis

본 논문에서는 상용프로그램을 이용한 유한요소해석을 통하여 포스트텐션 정착구역에서 보다 효율적인 응력분산이 가능 한 비부착식 단일 강연선용 포스트텐션 정착구 형상을 개발하는 것을 목표로 하였다. 이를 위하여 정착구 형상을 구성하는 각 부분의 변수해석을 수행하였다. 본 연구에서 제안한 정착구 형상을 사용하였을 때 발생하는 최대파열응력이 기존의 정착 구를 사용한 경우와 비교하여 정착구역내의 최대파열응력이 감소함을 확인하였다. 또한 본 연구의 정착구 형상을 사용하는 경우 최대파열응력 산정을 위해 AASHTO 및 기존 연구자들의 파열력 산정식을 통해 산출된 파열력을 비교 및 분석하였다. 그 결과 정착구 형상에 따른 위치계수를 수정한 파열력 산정식을 적용할 경우 정착구역이 효율적인 보강설계가 가능할 것으 로 판단되었다.

키워드

비부착식

단일 강연선

포스트텐션

정착구

응력해석

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 31
No :1
Pages :39-46
Received Date : 2017-10-25
Revised Date : 2017-12-05
Accepted Date : 2017-12-06
DOI :https://doi.org/10.7734/COSEIK.2018.31.1.39

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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