Testing method for testing building structural materials under thermal-mechanical coupling effect

Abstract

The invention discloses a testing method for testing building structural materials under a thermal-mechanical coupling effect. The method comprises the following steps: constituting a thermal-mechanical coupling system by utilizing a servo loading device, high-temperature equipment and an acoustic emission testing system, putting a test piece into upper and lower overhanging arms, regulating the servo system to perform preset loading on the test piece, performing real-time temperature rise on the test piece according to an international temperature rising curve ISO 834 by utilizing the high-temperature equipment, starting the acoustic emission testing system to monitor the test piece in the whole process so as to simulate the current situation that the building structural materials are stressed by a certain load when a fire happens, performing pressure-bearing test on the test piece when a target temperature reaches, and testing the mechanical properties of the test piece under the thermal-mechanical coupling effect, such as thermal expansion deformation, stress, strain, residual bearing capacity, elasticity modulus and the like by virtue of the servo system, thereby researching the performances of the building structural materials under the thermal-mechanical coupling effect.

Description

technical field [0001] The invention relates to the field of test methods, in particular to a test method for building structural materials. Background technique [0002] In actual engineering, when a fire occurs, the deterioration of building structural materials is more complicated, and the influencing factors are not unique. It is difficult to accurately reflect the actual engineering by studying and analyzing the performance of building structural materials based on the effect of a single factor. Therefore, it is of great significance to establish a test method for building structural materials under thermal-mechanical coupling, and to study the damage mechanism and protective measures of the degradation performance of building structural materials under thermal-mechanical coupling. [0003] At present, there are many open documents on the device and test method of building structure material performance test at home and abroad; CN102778389B patent document discloses a c...

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Problems solved by technology

The CN101949816B patent document discloses a test method for measuring the permeability coefficient of plastic concrete. The test method studies the permeability coefficient of plastic concrete and effectively solves the problem that the test in the mix design of plastic concrete for the existing cutoff wall cannot truly reflect the actual resistance. seepage problem

The CN106018251A patent document discloses a concrete component used for long-term coupling of load-solution corrosion, which can carry out long-term reinforced concrete tests of load-solution corrosion coupling to solve the problem that the loading instrument is easy to corrode and occupies a large area in the traditional test method Shortcomings

[0004] The above disclosed patent documents involve various testing methods and devices for building structural materials, which provide reliable and convenient conditions for the basic research of experimental theory. See the report about the test method for building structural materials under thermal-mechanical coupling

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