Study On Seismic Performance Of The Plasterboard Structure Reinforced With In-filled RC Columns

The plasterboard structure reinforced with in-filled RC columns has the advantages of good structural performance, fast construction, low cost and no pollution. It has been applied to some multi-storey buildings. In order to develop the plasterboard structure reinforced with in-filled RC columns for high-rise buildings, it is necessary to do further studies on the analysis theory and design methods for the new structural system.Based on equivalent stiffness method, the plasterboard reinforced with in-filled RC columns can be simplified as even concrete wall. Analysis models were set up by ABAQUS and the ultimate load-carrying capacity and hysteretic behavior of different wall panels were investigated. Compared with equivalent wall panels, the plasterboard reinforced with in-filled RC columns has similar stiffness in elastic stage, but higher load-carrying capacity and better energy dissipation capacity in the plastic stage. The results indicate that it is reliable to use the equivalent wall panel in the following structure analysis.Two high-rise residential buildings (18 stories) used the new structure system were taken as case studies. Modal response spectrum analysis and elastic time-history analysis were carried out by MIDAS/GEN and ABAQUS. Building 1 has short-leg concrete shear walls as structural walls in addition to plasterboard reinforced with in-filled RC columns. In building 2, only plasterboard reinforced with in-filled RC columns are designed to be bearing walls. It was shown that both buildings satisfied related design specifications and building 1 had large stiffness and better seismic performance due to the existence of short-leg concrete shear walls.