Asymmetric loading simulation test method and device of retractable steel arch
A simulation test and steel arch technology, which is applied in the direction of measuring devices, machine/structural component testing, instruments, etc., can solve the problems of inability to effectively simulate and test the mechanical properties of shrinkable steel arches, complicated operations, and low reliability , to achieve good detection effect, convenient operation and strong reliability
Active Publication Date: 2019-05-14
CHENGDU UNIVERSITY OF TECHNOLOGY +1
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Problems solved by technology
However, the current asymmetric loading test method is complex in operation, high in cost and low in reliability, and cannot effectively simulate and test the mechanical properties of shrinkable steel arches.
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[0035] In this embodiment, the experiment is carried out aiming at the asymmetrical situation of the arched waist. First, the test device is introduced, such as figure 1 As shown, a shrinkable steel arch asymmetric loading simulation test device includes a shrinkable steel arch 1 and a force applying component for applying pressure to the shrinkable steel arch; the shrinkable steel arch 1 includes an arch section 2 and retractable section 3, the arched section 2 is marked with a plurality of loading points, and the force application assembly includes a plurality of loading cylinders 4 corresponding to the plurality of loading points, and a plurality of loading cylinders 4 are arranged along the retractable The arch section of the steel arch 1 is distributed symmetrically around; each of the loading cylinders 4 is equipped with a load sensor for testing the pressure applied by the loading cylinder 4 and for testing the displacement of the dowel 6 displacement of the loading cyli...
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The invention discloses an asymmetric loading simulation test method of a retractable steel arch. The asymmetric loading simulation test method of the retractable steel arch comprises the steps of: S1, performing test preparation: assembling the retractable steel arch, fixing the retractable steel arch on an experiment table, and installing loading oil cylinders for applying loading force on the retractable steel arch; S2, pre-loading: adjusting the various loading oil cylinders, so that pressure simultaneously applied by the various loading oil cylinders acts on the retractable steel arch till the pressure is steady; S3, setting parameters: when the pre-loaded pressure is steady, setting the load, the displacement, the loading rate and the loading mode of the loading oil cylinders; and S4, a test process: according to the set parameters, applying pressure on the retractable steel arch by the loading oil cylinders at the same time, recording and storing test data, and stopping loadingwhen a loading test ending requirement is satisfied. The invention further discloses an asymmetric loading simulation test device of the retractable steel arch. The test method provided by the invention is convenient to operate, high in reliability and low in cost, can achieve a good simulation effect, and can well test the mechanical property of the retractable steel arch.
Description
technical field [0001] The invention belongs to the technical field of underground engineering such as highway tunnels and railway tunnels, and in particular relates to an asymmetric loading simulation test method and device for shrinkable steel arch frames. Background technique [0002] Generally, when the whole frame test is carried out on the steel arch frame, there are two types of loading methods: symmetrical loading and asymmetrical loading. Among them, the symmetrical loading mainly includes uniform load, high top pressure and small side pressure, large side pressure and small top pressure, etc. , asymmetric loading mainly includes the loading situation where the pressure on one side is high and the pressure on the other side is small. As for the loading test of the shrinkable steel arch, the test mainly studies the deformation and failure characteristics of the I-steel shrinkable arch under asymmetric stress conditions, that is, the steel frame under the load conditi...
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Inventor 孟陆波李天斌张文居祝陆彬牟力袁飞云何成罗志惠宋涛
Owner CHENGDU UNIVERSITY OF TECHNOLOGY