【作者】 田华； 张素梅； 郭兰慧；

【Author】 TIAN Hua ZHANG Su-mei GUO Lan-hui (School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)

【机构】 哈尔滨工业大学土木工程学院；

【摘要】 首先分析了双向压弯构件截面上所存在的几种荷载施加路径,然后针对实际工程中存在的两种典型加载路径,以方形、矩形钢管高强混凝土轴压短柱试验为基础并考虑材料受加卸载作用的影响,编制了非线性数值计算程序,对方形、矩形钢管高强混凝土双向压弯构件的截面强度承载力和构件在弯曲轴平面内的稳定承载力进行较为详细的研究.最后给出了方形及矩形钢管高强混凝土双向压弯构件的强度承载力和在弯曲轴平面内的稳定承载力相关关系,并分析了两种典型加载路径和加载角度对强度和稳定承载力的影响.更多还原

【Abstract】 This paper firstly analzed four possible loading-paths for CFST columns subjected to axial compres- sive load and bi-axial bending moment.Then two typical loading-paths existing in the engineering practice were used to investigate the bearing capacity of CFST columns with special consideration for loading and unloa- ding effects.On basis of the axial compressive experments of stocky columns,a nonlinear numerical program was developed to analyze effects of the loading-paths and loading-angles on the cross-section strength and on the in-plan stability of the columns.Moreover,the paper illustrates the there-dimensional interrelated surfaces for the strength and the in-plan stable capacity,Finally,analytical results show that:as far as SHS in conce- meed,the two typical loading-paths have about 4% difference on the strength and the in-plan stable capacity, in addition,the loading-angles have no effect on the strength and have litter effect on the in-plan stable capaci- ty;as far as RHS is concerned,the two typical loading-paths lead to only about 5% difference on the strength and the in-plan stable capacity,however,it is worthy of attention that the loading-angles produce greater effects on term.更多还原