摘要
在纤维模型法基础上,建立了能够考虑矩形钢管混凝土双向偏压构件截面变形轴扭转的计算方法,编制了非线性分析程序RA,分析了双向偏心荷载对矩形钢管混凝土轴向承载力及跨中截面变形轴扭转的影响.结果表明:程序计算结果与试验结果吻合良好;由欧洲规范4和我国规范计算矩形钢管混凝土双向偏压构件的轴向承载力(Nu)偏高于试验结果;双向偏心荷载严重降低了矩形钢管混凝土构件的轴向承载力.
Based on the fiber model a new method is presented to calculate the load - deflection curves of concrete-filled rectangular hollow section （RHS） columns under biaxial eccentric load with special consideration on the effect of cross-sectional neutral axis rotation. A nonlinear analysis program RA was developed and the analysis resuhs were compared with the experimental resuhs, which agreed well with each other. The experimental resuhs were also compared with the resuhs predicted by Eurocode 4 and the Technical Specification for Concrete-filled RHS in China, and it was found that the predicted results for biaxially eccentrically loaded concrete-filled RHS columns by EC4 and the technical specification exceeded the experiment results. Parametric analysis was carried out on the effects of biaxial eccentric loading on the axial bearing capacity （ N u ） and the rotation of cross - sectional neutral axis rotation of concrete - filled RHS columns. The results from parametric analysis showed that biaxial eccentric loading dramatically degrades the axial beating capacity of concretefilled RHS columns.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第5期712-714,共3页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(59808004)
黑龙省杰出青年基金资助项目
关键词
矩形钢管混凝土
双向偏心受压
静力性能
concrete-filled rectangular hollow section （RHS）
biaxial eccentric load
static behavior
