seismic response of connections precast concrete structures under seismic load

usage and advantage of precast reinforced concrete and produce to industry form in short time and being economical has been caused that prefabricated industry considered in all over the world. connections of prefabricated component is on seismic performance in precast reinforced concrete and also factors like strength and ductility have effect in this structures. performance of this structure is due this fact that the connections resistance is distinct from cast in- place concrete building. designing of precast reinforced concrete should be done in such ways that ensure their coherent behavior of structures. structural systems can be adopt with performance of building frame or hinged connections or suitable braced and performance of moment resisting from with rigid connections. framing in recast structures is due to connections of single vertical and horizontal to each other and changing them to rigid diagram against to lateral force. integration of base in connections with precast member should be done by means of reinforcement and limiting of stresses bound in connections area. good performance of precast structure against lateral loads and upright loads depends to stability and rigid in connection area in porter system. precast reinforced concrete has not good performance against lateral load due to hinged connection upon structure. the main reason is that there is weak connection between hinged connection and their construction is messy and also other reason is administrative error and inappropriate choice of structural system. lack of attention to these cases causes damage and destruction caused by the earthquake are in prefabricated structures.