Experimental Study On Behavior Of Encased Steel Column Base

Constructs in the steel structure, the steel column foots transmit endogenic force for the lower part foundation, cause the superstructure and the foundation effective connects in together, decides the first floor steel pole stable bearing capacity a primary factor, simultaneously also direct relation structure whole endogenic force distribution condition and distortion performance.Domestic and foreign are few to the outsourcing type steel pole foot's experimental study, the understanding is not very mature. This article designs according to "High-level Building iron-Concretes Composite structure Design Regulations" designs two structure same outsourcing type steel pole foot, respectively in the axis presses the ratio is 0 and in 0.2 situation carries on plans the static test. To the outsourcing type steel pole foot's endogenic force transmission mechanism, the limit supporting capacity, the fundamental construction request to conduct the analytical study.The research discovered that the steel pole foot's axle strength majority undertakes by the outsourcing reinforced concrete, the outsourcing reinforced concrete undertakes the shearing force value is bigger than the steel pole point of inflection's shearing force night-watch, the steel pole undertakes certain bending moment value similarly in the outsourcing section basis. Put forward the proposal to the outsourcing type steel pole foot's fundamental construction, the smallest outsourcing is 2.5D highly, smallest outsourcing thickness is 0.5D, may not use anti-cuts the bridge piece and so on. Simultaneously examined the existing standard design method security, puts forward the proposal according to the experiment conclusion to the outsourcing type steel pole foot's design method.