| Title |
Analysis of Tall Buildings Considered Staged Construction and Geometry Non-linearity |
| Authors |
Oh Hyang-Ok ; Park Hak-Kil |
| Keywords |
Tall Building ; Staged Construction Analysis ; Shear Deformation Effect ; Column Shortening ; Geometry Non-linearity ; Structure Softening |
| Abstract |
On the normal structural analysis method of a high-rise building, loads are assumed simultaneous working independent of the construction process and time. On this account, the actual structural behaviors is different from the calculation results. A considerable calculation errors result from the unconsidered load condition caused by the construction sequence and the stiffness change by concrete's strength variation during curing. If the buildings go to high-rising, the column shortening amount gradually accumulated by means of the effect of construction sequence, and then, a large lateral deformation is induced on the high-rise building, that requires a geometrical non-linear analysis, but normal structural analysis abbreviate it. This paper focus on these points. We analyze 40 multi-story model building considering the geometrical non-linear effect. The results showed that normal analysis unconsidered the effect of shear deformation is over-estimated in exterior column and is under-estimated in interior column compared with staged construction analysis. It means that normal analysis is not devisable to select the elements for design at a practical condition. A softening of tall building structure caused the building to displace horizontally larger than horizontal forces as like wind load. We confirmed that it is essential subject to consider a staged construction and geometry non-linear similarly with actual construction behavior for reducing the analysis error. |