The Influence Of The Short Columns In The Staircase On The Seismic Performance Of The Frame Structure

The reinforced concrete frame structure is a widely used structural form. At the staircase of frame structure, the usual way is that the frame column and the beam supporting the deck are linked together at present in the design, and this kind of way can give rise to the short column usually. The deformation characteristic of short column is the shear type. Brittle failure that occurs easily in the short column under earthquake action leads to structure sudden to destroy or collapses. Therefore we must adopt the effective construction measure to the short column in order to increase its deformed ability. Having adopted the effective construction measure to the short column, how about the seismic performance of frame structure that has the short column is? Compared with the frame structure that has not the short column, how about the seismic performance of it is? We have necessity to carry on systematic analysis and contrast.It begins with designing two representative reinforced concrete frames structure according to codes in this Paper. Their intensity of intermediate earthquake is 7 degrees, and construction site category belong to typeâ…¡, and characteristic period partition is in 2 areas. (The model 1 has not the short column in staircase. The model 2 has the short column in staircase.) Then the type of the column is judged according to the bending moment and the shear force caused the combination of earthquake action, dead load and live load and the formulaλ= M/Vh₀ , and the corresponding constructional measure is adopted to the short column found by the judgement. Finally, the nonlinear dynamic analysis in rare earthquake is carried out by the selected restoring force model and wave.