Multi-beam concrete bending creep test device and test method

Abstract

The invention discloses a multi-beam concrete bending creep test device. The test device comprises a hoisting device and a three-point creep loading instrument; the three-point creep loading instrument comprises a door-shaped steel bracket; two lower supports are arranged in the middle of the surface of the door-shaped steel bracket. A lower concrete beam test piece is placed above the lower support; middle supports are arranged at two ends of the surface of the lower concrete beam test piece. An upper concrete beam test piece is placed above the middle support; a plurality of deflection testdevices are arranged between the lower concrete beam test piece and the upper concrete beam test piece; two upper supports are arranged in the middle of the surface of the upper concrete beam test piece; a force transmission piece is hung at each upper support and extends to a position below the door-shaped steel bracket; a loading hanging basket is arranged at a position, located below the door-shaped steel bracket, of each force transmission piece, and the technical problem that in the prior art, the actual complex bending stress state of a concrete structure cannot be accurately reflected is solved.

Description

technical field [0001] The invention belongs to the field of building testing, and in particular relates to a multi-beam concrete bending and creep testing device and testing method. Background technique [0002] Creep is an inherent characteristic of concrete itself, and it is a slow deformation that occurs under continuous load, which significantly affects the safety and durability of the structure. [0003] At present, the research on concrete creep at home and abroad mainly focuses on concrete uniaxial compression and tension creep. However, there are significant differences between these two test methods and the actual stress state of concrete structures (roads, bridges, etc.). Pure uniaxial compression and tension cannot reflect the actual complex flexural stress state of the concrete structure, and cannot accurately characterize its creep behavior in the flexural state. In order to more accurately reflect the creep behavior of concrete under the actual stress state, ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-beam concrete bending and creep testing device and testing method to solve the technical problem that the above-mentioned prior art cannot accurately reflect the actual complex bending stress state of the concrete structure

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