Reinforcing steel bar and concrete pull-out testing device capable of eliminating high-temperature influences

Abstract

The invention discloses a reinforcing steel bar and concrete pull-out testing device capable of eliminating high-temperature influences, and belongs to the technical field of testing devices. The reinforcing steel bar and concrete pull-out testing device comprises an upper pull-out frame, a lower pull-out frame, an anchorage device, a slip measuring assembly and a force measuring assembly. By the combination effect of the upper pull-out frame and the slip measuring assembly, the force measuring assembly and a high-temperature test piece are separated and achieve testing, and therefore the phenomena that a test instrument is damaged by the temperature and reinforcing steel bar bonding power and slip value measurement is disturbed are avoided. The testing device is simple and controllable in machining and manufacturing, assembling and installing are convenient, a force transfer mechanism is clear, the testing device is applicable to reinforcing steel bar-concrete center pull-out tests, the bonding strength and relative slippage between reinforcing steel bars and concrete are measured, and the reinforcing steel bar-concrete bonding slippage performance can be effectively tested under high temperature.

Description

technical field [0001] The invention belongs to the technical field of test equipment, in particular to a steel bar and concrete pull-out test device which can eliminate the influence of high temperature. Background technique [0002] Fire is one of the threats that structures often face during their service. In a fire, the bonding performance of steel bars and concrete degrades, and the bonding and anchoring performance of steel bars and concrete is the key to ensure the bearing capacity of reinforced concrete structures. and deformation are important. However, there are relatively few bond-slip pull-out test devices for steel bars and concrete at high temperatures, and the pull-out test conditions at high temperatures are more complicated. Traditional pull-out test devices cannot eliminate the temperature influence of steel bars and concrete specimens at high temperatures, so they cannot Accurately measure the bonding force and relative slippage of steel bar and concrete...

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that there are relatively few bond-slip pull-out test devices for steel bars and concrete at high temperatures, and the pull-out test conditions at high temperatures are relatively complicated, the traditional pull-out test devices cannot eliminate the temperature influence of steel bars and concrete specimens at high temperatures. The present invention aims to provide a steel bar and concrete pull-out test device that can eliminate the influence of high temperature. The processing and manufacturing are simple and easy to control, easy to assemble and install, and the force transmission mechanism is clear. It is suitable for the steel-concrete central pull-out test to measure the bond strength and relative slip between the steel bar and the concrete. Efficient testing of mobility

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