Member structure element temperature axial force measuring apparatus

Abstract

The invention relates to a thermal axial force measuring device of a framed structure component, comprising a pressure tester with a pressure sensor, a component positioning device, a loading cylinderand a control system thereof, a heating and temperature-controlling device and a restrained beam system, wherein, the restrained beam system is installed on one side of the loading cylinder; a component is positioned on the component positioning device and disposed in the heating and temperature-controlling device; and the mid-span middle point of the restrained beam, the loading cylinder, the component and the pressure are arranged on the same horizontal axial line. The thermal axial force measuring device of the framed structure component has the advantages that the device can directly measure the thermal axial force considering factors of the material nonlinearity, temperature nonlinearity, geometrical nonlinearity, etc. of the component, and the measurement result is accurate. The thermal axial force of the component can be easily calculated by establishing the relationship among the thermal axial force of the component, the load-bearing level, the slenderness ratio of the component, and the rigidity and the temperature of the restrained beam and then determining the total restraint rigidity of the component, thus improving the calculation accuracy of fireproof design and evaluation of building structures.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device for the temperature and axial force of a rod system structural member. Background technique [0002] Usually, a building structure system is composed of multiple components, and the structure is often a statically indeterminate structure. Each member of the statically indeterminate structure will produce uneven expansion under the action of uneven temperature, but due to the existence of redundant constraints, the member with larger expansion is constrained by the member connected to it, and the member will generate temperature internal force, while in Temperature stress will be generated on its section. The prerequisite for a building structure to be in a reliable state is that the effect of the structure under the joint action of other loads and temperature (internal force) does not exceed the resistance of the structure. Therefore, the accurate evaluation or measureme...

AI Technical Summary

Problems solved by technology

[0003] At present, the method of determining the internal force of temperature is calculated by mechanical model, but due to the problems of material nonlinearity, temperature nonlinearity and geometric nonlinearity, the calculation results are very inaccurate when the temperature is high

Although it is possible to paste high-temperature strain gauges on certain parts of the component, measure the material strain in this part, and then calculate the strain transformation into temperature stress, but because the high-temperature strain gauges are expensive, they cannot be reused and must rely on a more accurate material model

The disadvantage of the above method is that it cannot directly measure the temperature internal force, and must rely on a more accurate material and temperature calculation model

Images