| Based on steel frame-buckling-restrained steel plate sheer wall system with rigid beam-column connections(R-BRW for short), a new structure system was put up in this paper, which is prefabricated steel frame-buckling-restrained steel plate sheer wall system with pinned beam-column connections(P-BRW for short). The structure system has pinned beam-column connections and transfixion column, which accord with the requirements of the whole prefabricate assembly. Under the action of the earthquake, the column is not the role of the horizontal force, beam-column joints don’t pass moment, which could greatly reduce the size of column section and beam section. Horizontal force shall be borne by the buckling governing the steel plate shear wall, which makes full use of the advantage of the dissipation of earthquake energy by the yield of the buckling constraints steel plate shear wall.In order to study the seismic performance of the new structure, this paper has conducted the following works:1. The simplified models were used to simulate the steel plate shear walls, steel plate shear wall buckling constraints using mixed "4-6" model, ordinary steel plate shear wall with mixed "2-8" model. The rationality of the simplified model was verified by using ANSYS software;2. Establishing P-BRW structure, R-BRW structure and steel frame with buckling restrained steel plate shear wall system and rigid beam-column connections (R-W for short) with the same size of column section and beam section and conducting frequent earthquake elastic analysis under different seismic fortification intensity to the models by using ANSYS. Selecting 2 set of natural and 1 set of artificial earthquake wave and using SAP2000 software for three models with different seismic fortification intensity under different seismic wave input, dynamic time-history analysis under the rare earthquake is action. Three models of floor displacement curve have been obtained respectively, interlayer displacement angle curve, the hinge mechanism, the vertex displacement time history curve and base shear time history curve, etc. The results show that the structures remain the elastic stage under the small earthquakes, the distribution of the interlayer displacement angle along the floor relatively uniform, P-BRW structure seismic performance than R-W structure seismic performance. Under the large earthquakes, flexural plastic hinges are formed at the column bases of R-BRW and R-W structure earlier than P-BRW structure, and P-BRW structure is not suitable for the area whose seismic fortification intensity greater than 8 (0.2g);3. Based on the study mentioned above, a 15 level P-BRW structure overall analysis model was established by using SAP2000 software and conducted rare earthquake dynamic time-history analysis under the different seismic fortification intensity and different seismic wave input, which studied the overall structure of the seismic performance.The results show that the new type of structural system with reasonable size of column section and beam section could meet the "no collapsing with strong earthquake" of the requirements for seismic resistance under the action of the rare earthquake with the seismic fortification intensity less than or equal to 8 degrees (0.2g), and the beam and column remain elastic and provide enough restoring force to achieve the overall structure’s " re-centring " function, which means the structure is suitable for the development requirements of steel structure building industrialization. |
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