The Nonlinear Analysis Of The Shock-resistance Performance Of The Node Of Reinforced Concrete Column In L Shape And With A High Axial Press Ratio

Presently, the research and examination aiming at the node of abnormity column is few. The node of girder and column with abnormity column is much weak than that of rectangle column, its shake damage maybe more serious.We have finished the nonlinear analysis of 10 L nodes with the software of finite element analysis of ANSYS. And the analysis are under the condition of humdrum load-on and repetitive loading. Investigate the stress mechanism of the node section under humdrum load-on and repetitive loading of low frequency, get the curve of load displacement,stagnant curve and frame curve; analyze the influence of many factors on the node ductility and energy consume under repetitive loading of low frequency, especially the factors such as different axial-press ratio,the intensity grade of concrete with a high axial press ratio,stirrup characteristic root with a high axial press ratio.Via the nonlinear analysis discover that: under the girder humdrum load-on, with the grade of concrete heightened, the load at first crack and the failing load of the node with a high axial press ratio are heightened to a certain degree; with the stirrup ratio heightened, the failing load of the node is also heightened, but too much stirrup or too high grade cut no ice on the failing load of the node; the axial press ratio is the chief factor that influence the antiknock capability of the framing node in L shape; with the grade of concrete heightened, when with a high axial press ratio, will result in the falling-off of the node ductility, but the impression is not as obvious as changing the stirrup ratio to node ductility; the antiknock capability of the framing node in L shape when with a high axial press ratio, is of a sort, and in design when confronted with the structure of strict axial press ratio, we'd better not take the L column.