Method for calculating initial rigidity of sandwich wallboard

Abstract

The invention belongs to the field of fabricated concrete structures, and particularly relates to a method for calculating the initial rigidity of a sandwich wallboard. The sandwich wallboard comprises an outer vane board, an inner vane board and a sandwich layer arranged between the outer vane board and the inner vane board, and the outer vane board and the inner vane board are made of concrete loaded with reinforcing steel bars. The method comprises the following steps that S1, the reinforcing steel bars in the outer vane board and the inner vane board are converted into equivalent concrete;S2, the height x<outer> of a pressed area of the outer vane board and the height x<inner> of a pressed area of the inner vane board are obtained; S3, the equivalent inertia moment I<outer> of the outer vane board and the equivalent inertia moment I<inner> of the inner vane board are obtained; and S4, the initial rigidity of the sandwich wallboard is obtained through the following formula, whereinthe initial rigidity is equal to E<c> I<outer>+E<c> I<inner>. The method has the beneficial effects that the method for calculating the initial rigidity of the sandwich wallboard is provided, the initial rigidity of the sandwich wallboard is obtained through theoretical calculation, and a theoretical basis is provided for subsequent calculation of a fabricated structure.

Description

technical field [0001] The invention belongs to the field of prefabricated concrete structures, and in particular relates to a method for calculating the initial stiffness of a sandwich wall panel. Background technique [0002] The prefabricated concrete structure is a concrete structure assembled on-site with prefabricated components as the main force-bearing components by means of standardized design, factory manufacturing, assembly construction, and information management. In recent years, the country has vigorously promoted the development of prefabricated concrete buildings, and prefabricated concrete structures have made great progress. However, the mechanical properties and connection of prefabricated components are still the key to the safe development of prefabricated buildings. [0003] Bending stiffness is the ability of materials, components or structures to resist deformation under the action of external force. The calculation of bending stiffness is the basis ...

AI Technical Summary

Problems solved by technology

However, the basic research on prefabricated concrete structures is still insufficient, especially because the sandwich wall panels have not been used for a long time in my country, and there is a lack of relevant theoretical research. Most structural properties can only be obtained by mechanical tests, and mechanical tests are not only experimental. The cycle is long, and it also requires a lot of manpower and material resources, and the test results can only be used for components with the same or similar size parameters as the test specimen, which is not universal

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