The Applied Research And Reinforcement Measures Of The Oblique Support In Oblique Inner Frame

In our country there are a large number of inner frameworks which is in the form of structures present, the structure is mainly to load-bear with the brick wall outside the circle and the part of the reinforced concrete frame, making full use of the bearing capacity of the outer brick wall, but the seismic performance of this structure is poor and can not meet current regulatory requirements. to ensure the overall seismic performance of the inner frameworks, it usually uses the oblique support to reinforce. In order to study the influence of the internal frame structure which the oblique support reinforced it before and after, this article has used the theoretical analysis, numerical simulation methods and combining the construction site, and relyed on the ramp braces Huating County, Pingliang City, the IRS this project example, focused on the inner framework’ the cycle, frequency, mode shape and internal forces of change, etc. which the oblique support reinforced it before and after. and been in conjunction with this project to gives some additional strengthening measures.Specific studies and the results obtained are as follows:1. It used the finite element analysis software MIDAS / GEN to establish the two inner framework models which had the oblique and non-oblique support, the oblique support reinforced it before and after, been in the location of the project at 8 degree earthquake zone,compared and analyzed the buildings’ period, frequency, and the vibration period ratio.obtained the torsion effect of the inner frameworks which the oblique support torsion reinforced it,and obtained the law of the inner framework’ torsion effect. Study has shown that: when the oblique support reinforced it after, the inner framework’ cycle became smaller,torsional stiffness enhanced, torsional effect decreased significantly.2. Under 7 degrees and 8 degrees earthquake, when the oblique support reinforced it before and after, it compared the two structural models’ interlayer displacement, story drift angle, the bottom of the column axial force and moment results. Study has shown that: the higher of the floors, the greater of the horizontal displacement; When the oblique support reinforced the inner framework after, the interlayer displacement and story drift angle has reduced; The column axial forces of the inner framework which has the oblique support to reinforce were no less than which had not; The column ends moments of the inner framework which has the oblique support to reinforce were less than which had not.3. It has used the EL Centro typical of seismic waves to get a time-history analysis for the two internal frame structure whether had the oblique supporting to reinforce, taked into account different direction seismic waves affect the inner framework, compared to analysis of its top-level nodal displacements in X, Y directions time curve and shear layers at the X, Y direction of the drive curve. Study has shown that: the inner frameworks’ occurrence of themaximum displacement of time in the X direction which has the oblique support to reinforce has occured along the Y direction of maximum displacement of approximately at the same time, the reverse effect of the structure is not obvious. Along the X, Y direction,the inner frameworks’ occurrence of the maximum displacement which was not at the same time, the structure would revers.