SEISMIC PERFORMANCE EVALUATION OF EXISTING WALL TYPE PRECAST REINFORCED CONCRETE RESIDENTIAL BUILDINGS EXTENDED WITH NEW CORRIDOR STRUCTURES

Significant number of wall-type precast reinforced concrete (WPC) residential buildings exist in Japan, constructed during the 1960-70s. They are assembled using prefabricated concrete panels for the slabs and walls and of high quality in terms of the structural conditions. In order to utilize them, seismic behavior of the existing buildings extended with new corridor and elevator structures were analytically evaluated. Static pushover analyses were conducted considering inelastic behavior of members and connections between the existing precast concrete wall panels. The ultimate lateral strength of the extended buildings were nearly equivalent to that of the existing buildings.