Structural Transfinite Design of a Certain Library
A certain library has a structural height of 28.50 m and a plane size of 84.50 m x 65.00 m.It is a reinforced concrete frame structure.To solve the problem of excessive overhang on the left side,inclined columns are used on the D1 axis,reducing the maximum overhang length to 3.80 m.The range of inclined columns is from the 2nd to the 4th floors.On the right side,due to the need for building facades,the DE axis adopts inclined columns.The range of inclined columns is from the 2nd to the 3rd floors.The slabs on the 5th floor are largely missing,resulting in irregularities such as slab discontinuities and through-story columns.Through PKPM and MIDAS software,elastic time history analysis,medium and large earthquake calculation,dynamic elastic-plastic analysis,inclined columns special analysis,slab thermal stress analysis,and other analyses were carried out.It is shown that the structure meets both the normal service limit state and bearing capacity limit state,and key components such as supporting large-span frame columns,inclined columns,and through-story columns meet the proposed seismic performance goals.The structure is reliable and safe.
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