建筑钢结构进展2025，Vol.27Issue(6)：74-84,11.DOI:10.13969/j.jzgjgjz.20231211001
十字形PEC短柱偏压性能及承载力计算方法研究
Study on Eccentric Compression Performance and Bearing Capacity Calculation Method of Cross-Shaped PEC Stub Columns
李媛萍 1林启颖 2李国飞2
作者信息
- 1. 暨南大学 力学与建筑工程学院,广州 510632||暨南大学"重大工程灾害与控制"教育部重点实验室,广州 510632
- 2. 暨南大学 力学与建筑工程学院,广州 510632
- 折叠
摘要
Abstract
This study utilizes a combination of theoretical analysis and finite element simulation to investigate the eccentric mechanical characteristics of the cross-shaped partially-encased composite(PEC)stub column,deriving a calculation formula for the eccentric bearing capacity.First,numerical modeling was performed using the ABAQUS finite element software to analyze the failure mode and mechanism of the specimen under large and small eccentricities.Parameter analysis was then conducted to explore the influence of parameters such as concrete strength,steel strength,loading angle,and limb-thickness ratio on the mechanical characteristics of the specimen.The results reveal that under eccentric compression,the profile steel does not yield in full section,but an elastic core is observed near the neutral axis.Increasing concrete strength significantly enhances the ultimate bearing capacity of specimens subjected to small eccentric compression.However,the effect diminishes with larger eccentric distances under large eccentric compression.Augmenting steel strength proves to be more effective in improving the bending capacity of the cross-shaped PEC column under both small and large eccentricities.Additionally,simplified calculation formulas for the N-M curves of cross-shaped PEC columns under uniaxial and biaxial eccentric compression were derived.Verification confirms the formulas have good accuracy and can provide a reference for engineering applications.关键词
十字形PEC短柱/单向偏压/双向偏压/极限承载力/荷载-弯矩曲线Key words
cross-shaped PEC stub column/uniaxial eccentric compression/biaxial eccentric compression/ultimate bearing capacity/load-moment curve分类
建筑与水利引用本文复制引用
李媛萍,林启颖,李国飞..十字形PEC短柱偏压性能及承载力计算方法研究[J].建筑钢结构进展,2025,27(6):74-84,11.
