Conservative determination method of seismic load input for seismic evaluation of supported equipment

Abstract

The invention relates to a conservative determination method of the seismic load input for the seismic evaluation of supported equipment. The method comprises the following steps of: inspecting a maximum stress intensity of the equipment when a last floor response spectrum of the equipment is taken as a seismic input; inspecting the maximum stress intensity of the equipment when an envelope acceleration given in an applicable equipment technology specification is taken as the seismic input; inspecting the maximum stress intensity of the equipment when the last floor response spectrum zero-cycle acceleration of the equipment is taken as the seismic input; inspecting the maximum stress intensity of the equipment when 1.5 times of a maximum value of a spectrum value corresponding to a frequency band larger than or equal to a fundamental frequency of the equipment of the last floor response spectrum of the equipment is taken as the seismic input; and simplifying the equipment and the support into a spring quality model to inspect the stress intensity of the equipment-support system under the effect of a mounting floor response spectrum, and comparing with the maximum stress intensity obtained by the other methods. By means of the above manner, a conservative treatment method for seismic input of equipment can be determined.

Description

technical field [0001] The invention relates to the technical field of anti-seismic design, in particular to a method for conservatively determining seismic load input with anti-seismic appraisal of support equipment. Background technique [0002] The equipment installed in the factory building is connected to the factory building in two ways, one is directly installed on the floor of the factory building, and the other is installed on the floor or wall of the factory building through a supporting structure. For the seismic identification of equipment, the source of the seismic load is the response spectrum of the plant floor obtained through the seismic analysis of the plant. For equipment directly installed on the ground of the factory building, the response spectrum of the corresponding floor can be directly used as the seismic input of the equipment. For the equipment installed on the floor or wall of the factory building through the support structure, the most reliable...

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Problems solved by technology

[0009] For the seismic input determined by the above method, since there is no linear relationship between the response spectrum at the support of the equipment and the response spectrum of the floor above the equipment, whether it is a conservative treatment method for the seismic input of the equipment remains to be seen. study

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