A Study of the Tendon Profile of a PSC Continuous Beam Able to Resist the Negative Bending Moment of Continuous Intergirders

Kim, Eui Hun

doi:10.12652/Ksce.2021.41.6.0617

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2021 Vol.41, Issue 6 Next Page

Structural Engineering

A Study of the Tendon Profile of a PSC Continuous Beam Able to Resist the Negative Bending Moment of Continuous Intergirders 거더 연속부의 부모멘트 제어에 효과적인 PSC 연속보의 텐던 배치에 관한 연구

1 December 2021. pp. 617-625

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Abstract

본 연구에서는 국내 개량형 PSC거더(Prestressed Concrete Girder)의 연속화 방식의 문제점과 연속텐던(Continuous Tendon)의 휨모멘트(Bending Moment) 특성을 분석하였다. 이 결과들을 바탕으로 본 연구에서는 거더 연속부의 부모멘트(Negative Moment) 제어에 효과적인 연속텐던 모델을 제안하였다. 이 모델은 연속텐던의 정착단을 거더 하부로 최대한 내리고, 거더 하부로 배치되는 텐던 구간을 늘려, 거더 중앙부의 긴장력 모멘트가 감소하더라도 연속지점부의 긴장력 모멘트를 증가시키는 방법이다. 이러한 연속텐던 모델은 거더 중앙부보다 연속지점부에서 대응해야 할 설계모멘트가 큰 합성 전 연속화 공법에 적합한 성능을 발휘할 수 있다.

키워드

PSC 거더

연속텐던

2차 모멘트

거더 연속화

거더 연속부

The problems associated with the continuous method of a domestically improved prestressed concrete (PSC) girder and the bending moment of a continuous tendon were studied. Based on the results, a continuous tendon model was proposed that can resist the negative bending moment of an intergirder. This model lowers the anchorage of the continuous tendon as far as possible under the girder, and extends the tendon section arranged under the girder. This method reduces the PS’s bending moment in the middle of the span, but maximizes it in the intergirder. This continuous tendon model can offer a suitable method for continuity before manufacturing a composite, which requires a higher design bending moment in the intergirder than in the middle of the span.

Keywords

PSC girder

Continuous tendon

Secondary moment

Continuous method

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Information

Publisher :Korean Society of Civil Engineers
Publisher(Ko) :대한토목학회
Journal Title :KSCE JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING RESEARCH
Journal Title(Ko) :대한토목학회 논문집
Volume : 41
No :6
Pages :617-625
Received Date :2020. 11. 20
Revised Date :2021. 01. 19
Accepted Date : 2021. 08. 20
DOI :https://doi.org/10.12652/Ksce.2021.41.6.0617

KSCE JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING RESEARCH ISSN:1015-6348(Print) 2287-934X(Online) 대한토목학회 논문집

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