Loading device for local punching performance test of high-strength grouting material restrained by round steel pipe

Abstract

The invention discloses a loading device for the test of the local stamping property of a circular steel tube-restrained high-strength grouting material. The loading device comprises a material member fixing cylinder, wherein the lower end of the material member fixing cylinder is arranged in a lower loading locating snap ring in a sleeving manner, the upper end of the material member fixing cylinder is arranged in an upper loading locating snap ring in a sleeving manner, a grouting material test piece is arranged in the material member fixing cylinder, a circular loading plate is arranged on the upper surface of the grouting material test piece in the upper loading locating snap ring, one ends of an upper load transmitting rod and a lower load transmitting rod are respectively connected to the circular loading plate and the lower loading locating snap ring; the other ends of the upper load transmitting rod and the lower load transmitting rod are connected with an extensometer. According to the loading device, by designing different contact areas of the upper loading locating snap ring and the lower loading locating snap ring and the test piece, the research of the local stamping property of the circular steel tube-restrained high-strength grouting material is realized. The loading device is strong in universality, can be used for local stamping tests and the like of various materials restrained by a circular steel pipe, and provides the basis for completely considering the mechanical property of a building material.

Description

technical field [0001] The invention relates to a loading device for a stamping performance test, which belongs to the technical field of structural engineering and is used for stamping test research on structural engineering materials. Background technique [0002] At present, the local "pressure-bearing" performance of high-strength grouting materials confined by circular steel pipes and theoretical studies are perfect, which provides an important guarantee for the design and construction of loaded steel pipe concrete structures. Inner diameter) is applied to the circular steel pipe constrained high-strength grouting material specimen to investigate the local failure characteristics and bearing capacity of the grouting material. However, in the research on the sleeve-type joint connection device of concrete filled steel pipe, it is found that the high-strength grouting material constrained by the circular steel pipe does not bear local pressure, but "local stamping". "The...

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Problems solved by technology

In view of the above reasons, there is no report on the local stamping test of high-strength grouting materials confined by circular steel pipes, and there is a lack of sufficient and reliable test data to provide scientific basis for engineering design.

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