Research on Deformation Behavior of Reinforced Concrete Composite Shear Wall with Concealed Bracings Based on Performamce

Article history: Received: 14.5.2014. Received in revised form: 20.1.2015. Accepted: 14.5.2015. In order to determine the deformation capacity of reinforced concrete composite shear wall with concealed bracings at different performance levels, some previous research of domestic scholars are reviewed by analyzing 89 shear wall specimens using a performance-based seismic design method. The performance levels of the structural element are divided into three stages to comply with the code for seismic design of buildings in China. Meanwhile, sectional plastic displacement angle under each performance level is derived and fitted within the shear span ratio ranging from 1-3. The analysis results show that average values of plastic displacement angle are about 2-3 times the corresponding ordinary shear wall, so we propose security reserve value K, as well as performance indexes of shear wall with concealed bracings according to the test data. Finally, indexes are compared with the relevant norms to provide references for China seismic design.