A novel ultimate external pressure test device and test method for a concrete hemispherical shell

Abstract

The invention provides a novel extreme outer pressure test device for a hemispherical concrete shell. The novel extreme outer pressure test device comprises a fixed supporting cover, a capsule, a pressurization device, a deformation detection device and a data acquisition processing device. Therefore, the pressurization device is used for pressurizing the capsule; under the supporting of the fixed supporting cover, the capsule uniformly applies expansion pressure to the outer surface of the hemispherical concrete shell; the pressurization device pressurizes the capsule until the capsule is damaged and transmits a pressure signal to the data acquisition processing device; the deformation detection device detects the deformation of the hemispherical concrete shell and transmits a deformation signal to the data acquisition processing device; the data acquisition processing device performs analytic processing on the respective signals to obtain an outer pressure extreme of the hemispherical reinforced concrete shell and a relation between outer pressure and a damage mode. Compared with the prior art, the novel extreme outer pressure test device can forecast a possible damage mode of the hemispherical concrete shell by repeatedly detecting the hemispherical concrete shells which have different thicknesses and different radiuses and consist of different steel bars. The invention also provides a test method based on the device.

Description

technical field [0001] The invention relates to the technical field of testing shell structures in buildings or structures, in particular to a concrete that can test the external pressure that a reinforced concrete hemispherical shell can withstand, the relationship between the external pressure and the failure form, and the influencing factors of the limit external pressure A new limit external pressure test device and test method for hemispherical shells. Background technique [0002] The containment of nuclear power plants, offshore platforms, large silos and liquid storage tanks are industrial fields that have developed rapidly in recent years and have broad prospects. Most of them are large-scale key projects in the country. Pay attention to. [0003] Concrete hemispherical shells in actual buildings or structures often have accidents such as concrete hemispherical shell rupture due to excessive external pressure and insufficient strength. However, due to factors such ...

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Problems solved by technology

[0003] Concrete hemispherical shells in actual buildings or structures often have accidents such as concrete hemispherical shell rupture due to excessive external pressure and insufficient strength. However, due to factors such as large volumes and complex structural forms of these buildings or structures, engineering It is difficult for technicians to carry out scientific experimental research on accurate prototype structures, and it is inconvenient to test the external pressure that reinforced concrete hemispherical shells can withstand, the relationship between external pressure and failure forms, and the influencing factors of ultimate external pressure, so it is impossible to predict the concrete hemispherical shell. The possible failure forms and the influencing factors of the ultimate external pressure when subjected to the corresponding external pressure, to give the suggested value of the thickness limit of the concrete hemispherical shell, to guide the engineering design of this type of structure, so as to improve the ability of this type of structure to resist accidents

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