The Experimental Study On Concrete Filled Square Steel Tube Columns Bond-Slip And Shearing Connectors

Concrete filled square steel columns are widely used in high-rise building,people more concerned about its shear bond behavior.To carry out research in this area is of great theoretical and practical significance.This article predecessor's filled square steel columns axial put-off test,Analysis and summarizes the main factors of bond strength.Regression analysis of the bond strength formula.Based on the theoretical basis of predecessor,through elasticity and Materials Mechanics methods,Draw on the bond strength of the semi-theoretical semi-empirical formula.Calculate the bond strength under different conditions.According to this article's bond strength formula,obtain the formula for shear transfer length,calculate critical anchorage length,found that only rely on their own to transfer shear bond strength,will affect the CFRT performance.Suggested that uses the shearing connector.Summarize the form of shearing connector,Sum up their advantages and disadvantages.Through 3 nodes experiments and unifies the domestic and foreign related the data information get the bearing capacity formula of internal and external shearing connectors,stipulate shearing transmit length under shearing connectors.And use it as the premise,derived shearing connectors to meet the conditions required.