A New Ultimate Internal Pressure Test Method for Concrete Hemispherical Shells

Abstract

The invention provides a novel limit internal pressure testing device for a concrete hemispherical shell, which includes a capsule, a blocking device, a pressing device, a deformation detection device and a data acquisition and processing device. In this way, the present invention uses a pressurizing device to pressurize the capsule, the capsule uniformly applies the expansion pressure to the inner surface of the concrete hemispherical shell, the pressurizing device pressurizes the capsule until it is destroyed, and transmits the pressure signal to the data acquisition and processing device and the deformation detection device. The deformation of the concrete hemispherical shell is detected, and the signals such as the deformation value are transmitted to the data acquisition and processing device. The data acquisition and processing device analyzes and processes each signal, and obtains the internal pressure limit of the reinforced concrete hemispherical shell and the relationship between the internal pressure and the failure form, etc. Compared with the prior art, the concrete hemispherical shells with different thicknesses, radii, and steel bars are repeatedly detected by the present invention, and the possible failure modes of the concrete hemispherical shells can be predicted; the present invention also proposes a testing method based on the above-mentioned testing 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 internal pressure that a reinforced concrete hemispherical shell can withstand, the relationship between the internal pressure and the failure form, and the influencing factors of the limit internal pressure A new limit internal pressure testing device and testing 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 shells rupture due to excessive internal pressure and insufficient strength. However, due to factor...

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Problems solved by technology

[0003] Concrete hemispherical shells in actual buildings or structures often have accidents such as concrete hemispherical shells rupture due to excessive internal 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 internal pressure that reinforced concrete hemispherical shells can withstand, the relationship between internal pressure and failure forms, and the influencing factors of ultimate internal pressure, so it is impossible to predict the concrete hemispherical shell. The possible failure forms and the influencing factors of the ultimate internal pressure when subjected to the corresponding internal pressure are used to give the suggested value of the thickness limit of the concrete hemispherical shell, and 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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