Seismic Strengthening Design and Performance Analysis of an Existing RC Frame

The reinforcement design and seismic performance analysis of the Teaching Building of Jiangyan Experimental Elementary School are investigated in this paper. Firstly, according to the seismic assessment report provided by an inspection company, the seismic strengthening design is conducted by using the methods of enlarging sections and sticking CFRP. Secondly, a three-dimensional model is established by using the structural analysis software OpenSees, and both the dynamic characteristics and seismic responses of the structure under frequent earthquakes are analysed. Lastly, the dynamic elastic-plastic time history analysis of the structure is conducted under rare earthquakes, then seismic performance of the structure with and without strengthening are compared under far-field earthquakes. The results show that the seismic performance of the structure is effectively improved, as the maximum reduction of the storey drifts can reach 35%, when the structure is subjected to rare earthquake.