Self-positioning detachable concrete durability test stress loading device

Abstract

The invention discloses a self-positioning detachable concrete durability test stress loading device, which consists of a stress loading clamp, a positioning clamp and a stress test control clamp. The stress loading clamp comprises two upright posts, a lower pressing plate, a middle pressing plate, two springs, an upper pressing plate and a plurality of rolling shafts; the positioning clamp is provided with a plurality of positioning holes for positioning the rolling shafts and longitudinally placed between the lower pressing plate and the middle pressing plate; and the stress test control clamp comprises a circular handle, a screw, a bearing plate, a sensor and two sleeves, wherein the two sleeves are sleeved at the tops of the two upright posts, and the sensor is embedded at the lower end of the screw and contacted with the upper pressing plate. The device has a simple structure, is convenient to operate, and can simulate the real working conditions of stress, chemical erosion and drying and watering cycle or thawing cycle acted on a concrete member together in actual engineering so that the data measured by a laboratory have engineering reference value.

Description

technical field [0001] The invention relates to the technical field of concrete durability tests, in particular to a stress loading device for concrete durability tests under the coupling action of multiple factors. The law of performance degradation and damage mechanism under the coupling of factors. Background technique [0002] The deterioration and failure of concrete in actual engineering is usually the result of the coupling of multiple damage factors, and it is difficult to accurately reflect the actual engineering by analyzing the durability of concrete based on the effect of a single factor. Therefore, it is of great significance to establish a multi-factor coupling experimental method that simulates the real environment-stress state, and to study the performance degradation law, failure mechanism and preventive measures of concrete under the multi-factor coupling effect. [0003] The commonly used stress loading device in China is composed of two columns, a bottom...

AI Technical Summary

Problems solved by technology

However, during the experiment, the device will cause stress relaxation due to spring corrosion, and it is difficult to apply constant stress. If it is adjusted regularly, the steps will be cumbersome

The disclosed name of CN 2906593Y is "lever method stress loading device", which applies constant stress to concrete specimens by adjusting the counterweight. It has the advantages of no stress relaxation, good economy, and simple operation, but the device takes up a lot of space and has low experimental efficiency.

The disclosed name of CN 2906592Y is "sensor method stress loading device", which applies stress to concrete specimens by collecting loads and controlling spring deformation through stress sensors. Risk of sensor corrosion by aggressive solutions

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