EXPERIMENTAL RESEARCH ON CONCRETE COLUMNS REINFORCED WITH PREFABRICATED CAGE SYSTEM UNDER AXIAL COMPRESSION

The steel cage concrete ( Prefabricated Cage System，PCS) is a new concrete structure． Having advantages of faster construction，high degree of quality control，better ductility and absorbing higher energy，which can be used in many members of a concrete structure，which is an important additional part of reinforced concrete system． The tests were carried out for four concrete columns reinforced with prefabricated cage system and one reinforced concrete column． The main conclusions are: the failure features of concrete columns reinforced with prefabricated cage system are basically similar to rebar reinforced system; the ductility of prefabricated cage system is better than rebar cage system，which improve up to 49. 2%; the capacity of absorbing energy can be improved by 73. 5% using prefabricated cage system than rebar cage system; the stress of longitudinal steel relates to its position．