Full-closed fabricated stirrup with measurable overall length strain

Abstract

The invention discloses a full-closed fabricated stirrup with measurable overall length strain. The stirrup comprises two U-shaped steel bars with the same structures, wherein free ends of each U-shaped steel bar are welded with steel shaft sleeves respectively, the steel shaft sleeves of the two ends of the two U-shaped steel bars are connected integrally through straight steel bars respectively,each straight steel bar is internally provided with a long straight groove axially running through the corresponding straight steel bar, a set of strain pieces are pasted at intervals on the inner wall of each long straight groove, each set of the strain pieces are connected through a wire, and each wire stretches out of the corresponding straight steel bar. The full-closed fabricated stirrup with the measurable overall length strain can effectively ameliorate negative factors of a traditional testing technology and improve the accuracy of clausal calculation of the shear bearing capacity ofthe stirrup, thereby improving the accuracy of an existing shear bearing capacity formula designed normally.

Description

Technical field: [0001] The invention relates to a fully-closed assembled stirrup with measurable full-length strain, which belongs to the performance testing technology of steel bars. Mainly used in construction, bridges, water conservancy and transportation and other fields. Background technique: [0002] The shear performance prediction of reinforced concrete members has always been a challenging classic problem in the field of structural engineering, which has attracted a large number of scholars to conduct continuous research for more than a century. In the past few decades, there have been many important advances in the exploration of this problem, however, it is still recognized as one of the most under-understood and most important problems in the field of reinforced concrete. Different from the bending failure of properly reinforced beams, the shear failure of reinforced concrete beams usually presents the characteristics of brittle failure, which occurs suddenly a...

AI Technical Summary

Problems solved by technology

Although this method can obtain the full-length strain of the stirrup, the structure of the open or semi-closed stirrup cannot guarantee the effective restraint of the stirrup on the concrete, and cannot reflect the real force of the stirrup in the reinforced concrete member.

[0005] The above shortcomings h

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