Test device for applying permanent axial compressive load to multiple concrete specimens simultaneously

Abstract

The invention provides a test unit used for simultaneously applying a lasting axial compressive load on multiple concrete samples. The test unit comprises two pressure holding boxes arranged oppositely, two loading steel plates arranged in parallel between the two pressure holding boxes, a jack located between the two loading steel plates, a pressure sensor, four opposite pulling rods, and a data acquisition box used for acquiring the data of the pressure sensor, wherein the pressure sensor is connected with the data acquisition box, one end of the jack is abutted against one loading steel plate, the other end of the jack is abutted against the pressure sensor, and the pressure sensor is installed in the central position of the other loading steel plate. The test unit can simultaneously apply the lasting axial compressive load on multiple concrete samples, the cost is low, the test efficiency is high, and the problem of dispersion of the concrete samples in the process of loading the axial pressure is solved.

Description

【Technical field】 [0001] The invention belongs to a test device for concrete test pieces in the field of building construction, and in particular relates to a test device for applying persistent axial compression loads to multiple concrete test pieces at the same time. 【Background technique】 [0002] Early demolition formwork technology is a new type of "quick dismantling system", which is in the stage of project promotion and application. The "quick release system" means that when the concrete poured in a certain layer reaches a certain strength, under the premise of ensuring construction safety, except for the reserved vertical poles and late removal support heads, the beam bottom formwork is removed early, thereby speeding up the construction progress . [0003] The demolition time of the beam-slab bottom form in the existing aluminum alloy early demolition formwork technology is mainly based on foreign experience, and the beam-slab bottom form is removed when the concre...

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Problems solved by technology

[0004] At present, some researchers have developed some test devices for axial compressive load (ie, axial compressive load) on concrete specimens, but there are some defects. Pressure, because the concrete specimen deforms quickly in a short period of time, it is necessary to continuously adjust the position of the limit position on the press, the test workload is large, and because it relies on the press, it needs to be operated in the laboratory; or it can only be used for a single concrete specimen Carry out the test, the test workload is heavy; and the existing concrete specimens will have discrete problems during the loading process

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