Abstract：
Steel pipe concrete composite column is composed of steel pipe concrete at middle part of cross section and reinforced concrete outside the steel pipe. The two super-high office buildings of East Ocean Business Center （Phase I） engineering adopt composite column structure system, using the following three connection methods, including steel pipe connection, fin plate connection and steel pipe steel bar, as well as RC ring beam node. The engineering adopts advanced technologies and fast construction schedule, successfully realizing favorable social and economic benefits.
