安徽工程大学学报2025，Vol.40Issue(4)：66-73,8.
装配式圆形半连续钢管混凝土柱的极限承载力研究
Ultimate Load-bearing Capacity Prediction of Prefabricated Circular Semi-continuous CFST Columns
摘要
Abstract
To investigate the eccentric compression mechanical behavior of prefabricated circular semi-continuous concrete-filled steel tubular(CFST)columns,ten eccentric compression tests were conducted on such columns.Based on the multi-component coupling system analysis approach,an in-depth analysis of the weak points of these columns was undertaken at the component level.This analysis revealed the coupling relationships among various components and proposed a prediction method for the eccentric compression ultimate load-bearing capacity of prefabricated circular semi-continuous CFST columns,considering component dimensions,failure modes,and ultimate load-bearing capacities.The research findings indicate three primary failure modes for these columns:local buckling,overall buckling accompanied by local buckling,and instability failure.The load transfer path is from the upper steel tube to the outer steel tube via bolts,and then to the lower steel tube.The upper and lower columns,along with the bolt-outer steel tube connection,constitute the core modules.Among these,the core concrete serves as the primary component,while the upper(lower)steel tubes,outer steel tube,and bolts act as secondary components.The proposed prediction method exhibits excellent accuracy in estimating the ultimate load-bearing capacity,with a mean ratio of predicted(Ppre-u)to measured(Pu)values of 0.970 and a variance of 0.000 5.The calculated results tend to be conservative,validating the applicability and accuracy of the proposed ultimate load-bearing capacity prediction method for prefabricated circular semi-continuous CFST columns.关键词
多部件耦合系统分析方法/装配式钢管混凝土柱/破坏模式/极限承载力Key words
methods for analyzing multi-component coupled systems/prefabricated concrete-filled steel tubular columns/destruction mode/ultimate load-bearing capacity分类
土木建筑引用本文复制引用
钱华山,谢磊,宋延伟,朱龙飞,曹兵..装配式圆形半连续钢管混凝土柱的极限承载力研究[J].安徽工程大学学报,2025,40(4):66-73,8.基金项目
安徽省自然科学基金面上项目(2408085ME122) （2408085ME122）
安徽省高等学校自然科学研究重点项目(KJ2021A0504) （KJ2021A0504）
