Complete set of test method of soft soil iron structure vibration table

Abstract

The invention relates to a complete set of test method of a soft soil iron structure vibration table. The method comprises the following steps of: preparation of soft soil in a model box in a vibration table model test, design of a model box, and typical subway station structure and joint structure test simulation and measurement system. The station structure and joint structure model can be manufactured from a particle reinforced concrete structure; and the inner side of the rigid boundary in the excitation direction of the model box is lined with a flexible material. The rigid fixing boundary is made into a support frame by angle steel, a wood plate is used as the side wall of the box body inside, and the bottom material is steel plate. In a direction vertical to the horizontal vibration direction, each inner wall of the box body is lined with a polystyrene foam plastic plate; and in the direction of the horizontal vibration, a polystyrene film is stuck on each inner wall of the box body, and broken stone is stuck on the bottom of the model box. A resistance strain gauge type pressure box of the measurement system measures the ground-breaking pressure time interval of the soil body in the model box, a resistance strain sensor measures the strain time interval of the station structure, and a piezoelectric type acceleration sensor measures the acceleration time interval of the soil body and the station structure. The method provided by the invention realizes vibration table test for the station structure and running tunnel structure community in the underground railway building structure of a soft soil region.

Description

technical field [0001] The invention relates to a complete test method of a vibration table for an iron structure in soft soil. Background technique [0002] With the rapid development of social economy, the scale of my country's urban subway construction is rapidly expanding. At the same time, for the needs of disaster prevention and mitigation, research on the establishment of seismic design methods for subway stations and interval tunnels is attracting increasing attention. The rapid development of computer and numerical simulation computing technology provides effective tools for solving such problems, and a variety of algorithms have been proposed so far. However, due to the lack of understanding of the impact of various complex factors involved, different calculation methods Or the results obtained by the models are often very different, and it is difficult to identify the rationality of the respective results. Experimental research is an effective means to solve such...

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Problems solved by technology

[0003] The results of shaking table tests of subway station structures are greatly affected by soil layer parameters, structural material parameters, structural model size, and test measurement devices. In recent years, many scholars at home and abroad have conducted shaking table tests on subway building structures, most of which Scholars use plexiglass material models or conduct shaking table tests in liquefiable soil layers, and the test results have large errors

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