Device and method for studying performance of steel pipe concrete compression-bending member under loads and corrosion

Abstract

The invention discloses a device and method for studying the performance of a steel pipe concrete compression-bending member under loads and corrosion, and belongs to the technical field of structural engineering. The device is composed of a loading mechanism, a corroding mechanism and a measuring mechanism. A fixed end hinge support and a free end hinge support are arranged on a support. The two ends of the steel pipe concrete compression-bending member are hinged to the fixed end hinge support and the free end hinge support. A force transmitting plate is arranged outside the free end hinge support. After a pull rod penetrates through the force transmitting plate and the fixed end hinge support, the two ends of the pull rod are connected with nuts. The outer end of the pull rod is connected with the corresponding nut after penetrating through a counter force plate. A jack is arranged between the force transmitting plate and the counter force plate. The steel pipe concrete compression-bending member is sleeved with a negative plate. A negative electrode of an external DC power supply is connected with the negative plate, and a positive electrode is connected with a steel pipe of the steel pipe concrete compression-bending member. The method includes the steps of conducting a test in the initial loading stage, conducting a test in the electrochemical corroding and long-term loading stage, conducting a test in the breakage loading stage, and drawing the eccentric pressure and span center deflection stress full-process curve of the steel pipe concrete compression-bending member.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a test device and method for studying the performance of a concrete-filled steel tube compression-bending member under long-term load and electrochemical corrosion environment. Background technique [0002] Concrete-filled steel tubular (CFST) is a type of composite structure, which refers to a structure formed by filling a steel tube with concrete and the two materials are jointly stressed. According to the arrangement of steel pipes, it can be divided into solid steel pipe concrete, hollow sandwich steel pipe concrete and centrifugal steel pipe concrete, etc.; according to the cross-sectional shape, it can be divided into circular, square / rectangular, polygonal and special-shaped steel pipe concrete, etc. Concrete-filled steel tubes often bear large loads in practical projects, and at the same time, they are also subject to the corrosive effects of co...

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Problems solved by technology

At present, there are test devices and methods for the performance research of CFST compression members under long-term loads or test devices and methods for the research of electrochemical corrosion resistance of CFST compression members, but the above test devices and methods can only realize A kind of effect, can not realize the long-term load effect and electrochemical corrosion effect on the steel pipe concrete bending member at the same time

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