建筑钢结构进展2018，Vol.20Issue(3)：58-71,14.DOI:10.13969/j.cnki.cn31-1893.2018.03.008
火灾后型钢混凝土异形柱正截面承载力非线性分析
Nonlinear Analysis of Section Bearing Capacity of Steel Reinforced Concrete Special-Shaped Columns After Fire
摘要
Abstract
Thirty five specimens are designed for static loading to research the section bearing capacity,including nine cruciformshaped,eight T-shaped,nine L-shaped with equal legs (DL-shaped) and nine L-shaped with unequal legs (BL-shaped)steel reinforced concrete special-shaped columns.A set of MATLAB nonlinear programs are compiled.Overall,the calculation results are consistent with experimental results.And the influences of loading-angle,sectional steel ratio,concrete strength grade and eccentricity are analyzed.Test results show that the failure modes of steel reinforced concrete special-shaped columns are tension failure mode,compression failure mode,balanced failure mode and axial compression failure mode.The sectional strain basically fits the plane-section assumption.When the columns are loaded with same eccentricity,the specimens with 45° are more damaged than those with 0°.The increase in the sectional steel ratio and concrete strength grade can improve the normal section bearing capacity effectively.With the increase of eccentricity,the flexural capacity decreases.关键词
火灾后/型钢混凝土异形柱/正截面承载力/非线性分析Key words
after fire/steel reinforced concrete special-shaped column/section bearing capacity/nonlinear analysis分类
建筑与水利引用本文复制引用
高立堂,蔡维沛,李晓东..火灾后型钢混凝土异形柱正截面承载力非线性分析[J].建筑钢结构进展,2018,20(3):58-71,14.基金项目
国家自然科学基金(51178232) （51178232）
