Numerical Model for the Estimation of Ultimate Load Capacity of CFT Columns Considering Time-dependent Behavior

Seong Hun Kim; Hyo-Gyoung Kwak

doi:10.7734/COSEIK.2024.37.1.25

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2024 Vol.37, Issue 1 Preview Page Next Page

Research Paper

Numerical Model for the Estimation of Ultimate Load Capacity of CFT Columns Considering Time-dependent Behavior 시간 의존적 거동을 고려한 CFT 기둥의 극한 하중 계산을 위한 수치 해석 모델 제안

29 February 2024. pp. 25-31

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Abstract

This paper introduces a numerical analysis model capable of evaluating CFT (Concrete-Filled Tube) columns across all time stages, incorporating creep behavior analysis and inelastic analysis to account for time-dependent behavior. The proposed model is compared with experimental results, revealing that the numerical model presented in this paper demonstrates more accurate trends than existing design criteria. Following verification, a numerical analysis is conducted for each slenderness ratio, determining the ultimate load capacity and examining the short-term and long-term sustained load behavior of the overall CFT column members.

Keywords

CFT

layer section

creep deformation

time-dependent deformation

inelastic analysis

본 논문에서는 시간 의존적 거동을 고려하기 위한 크리프 거동 해석과 비탄성 해석법을 통해 기존의 설계기준 보다 정확하고 전 시간 단계에서의 CFT 기둥의 해석을 가능하게 하는 수치 해석 모델을 제안하고, 기존의 CFT 기둥에 수행된 실험 결과와 비교하였다. 그 결과 본 논문에서 제안된 수치 해석 모델의 결과가 기존의 설계 기준의 결과보다 정확한 추세를 나타낸다는 것을 파악 할 수 있었다. 검증 이후 세장비에 따른 수치 해석을 수행하여 전반적인 CFT 기둥 부재의 단기 및 장기 지속 하중 거동에 대한 극한 하중의 정도를 확인하였다.

키워드

CFT

적층 단면

크리프 변형

시간 의존적 거동

비탄성 해석법

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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 : 37
No :1
Pages :25-31
Received Date : 2023-10-25
Revised Date : 2024-01-04
Accepted Date : 2024-01-19
DOI :https://doi.org/10.7734/COSEIK.2024.37.1.25

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

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