实腹式型钢混凝土异形柱框架受力性能有限元分析

FINITE ELEMENT ANALYSIS OF MECHANICAL PROPERTIES OF SOLID STEEL REINFORCED CONCRETE FRAME WITH SPECIAL-SHAPED COLUMNS

采用ABAQUS对实腹式型钢混凝土异形柱框架在单调水平荷载作用下的受力性能进行有限元分析,获得了框架柱型钢的正应力分布和节点核心区型钢的剪应力分布,以及框架的整体和局部变形。与试验结果的对比表明,计算结果是可靠的。由分析可知,实腹式型钢混凝土异形柱框架承受水平荷载作用时,沿加载方向,边框架的角柱和中框架的边柱的截面内力分布不均匀,而边框架的边柱和中框架的中柱的截面内力分布较为均匀;边框架的角柱处于双偏压状态;节点核心区型钢腹板中心的剪应力最大,向四周逐渐减小;处于不同位置的相同类型节点的剪切变形不同。

Finite element analysis of mechanical properties of solid steel reinforced concrete frame with special-shaped columns under monotonic loading was performed by using ABAQUS software.The normal stress distribution of steel in column,shear stress distribution of steel in panel zone and global and local deformation of frame were obtained.Compared with the experimental results,it was shown that the calculation results were reliable.The analytical results indicated that when the monotonic loading was applied on solid SRC frame with special-shaped columns,along the loading direction,the section internal force of corner column of side frame and side column of middle frame distributed non-homogeneously,but that of side column of side frame and center column of middle frame distributed homogeneously.The corner column of side frame was at the state of bi-axial eccentric compression.The shear stress of steel at the center of panel zone was the maximum,and gradually diminished from the center to directions outwards.At different position of frame,the same type of joints had different shear deformation.