A new type of strongly polar organic polymer porous layer open tubular column (OPPLOT-A) was prepared by in situ copolymerization of acrylonitrile and divinylbenzene.

The numerical analyze results show that the core steel tube joint applied to concrete filled square steel tubular column and reinforced concrete beam have good mechanical property, and structure beh.

The design of the steel tubular column joints is also discussed, which makes it more operable in actual construction.