Abstract:To improve durability of the concrete column of the bridge,the concept of plastics tube filled with concrete(PTFC) was introduced,and HDPE tube was chosen as the material to confine the concrete column.The research on the mechanical behavior of the PTFC was conducted,and the strength coefficient and stress-strain curves of the PTFC are discussed.Thickness of the tube wall and nominal strength grades of the core concrete were taken into account.The result of the test proves that the PTFC has excellent ductility and compressive strength.The research provides several theory bases for the design of the PTFC in the future.