Study On Yield Mechanism Of Frame Structure "Strong Column Weak Beam"

In recent years,due to the impact of the Wenchuan earthquake in 2008,large areas of houses collapsed,and houses designed in accordance with the norms did not reach the prescribed strength,people begin to consider what factors have affected the realization of the strong pillars and weak beams mechanism.And how to avoid these factors.The weak beam failure mechanism of strong column refers to the design requirements of the plastic hinge of the frame structure appearing at the beam end when the damage occurs.When the beams are forced together,the frame beam yields before the frame column to prevent the floor from collapsing.In this paper,the results of the analysis are compared with the general frame,and the frame structure of the floor designed according to the T-section is compared,and the effect of the opening seam on the weak beam mechanism of the strong column is evaluated.This paper mainly discusses the following aspects:(1)It briefly describes the research conducted by foreign and foreign countries on the research path of the framework structure to reach the strong pillar weak beam failure mechanism and the criteria set for achieving the goal;(2)The dynamic time history analysis of a three-story 2 × 3 span frame structure was conducted,and the damage of the beam column under the influence of seismic wave participation was observed and analyzed.The results showed that the floor opening frame structure was in the same situation.,The damage damage of the frame column is smaller,the stress damage of the beam end is larger,and the damage demand of the strong column weak beam can be effectively achieved.(3)Using ABAQUS large-scale finite element analysis software to analyze and calculate the model,we obtain intuitive data such as stress clouddiagram,top displacement time curve,inter-layer displacement time curve,base shear curve,acceleration time curve,etc..The yield mechanism of floor opening and opening frame under seismic action is analyzed.In this paper,at first compare the yield failure of normal frame and floor opening structure under the influence of EL seismic wave,and then compare the yield failure of floor opening structure under the action of two natural seismic waves and one artificial wave according to the norm.Finally,through the analysis of the data results,which is proved the design of floor opening have obvious effect on the realization of the failure mechanism of the strong column and weak beam.