Floor response spectrum simplified calculation method considering SSSI effect

A technology that simplifies calculation and response spectrum. It is used in calculations, design optimization/simulation, special data processing applications, etc. It can solve the difference between the calculated structure and the actual structure, and the embedded effect cannot be considered for a structure with a large amount of calculation and a deeply embedded structure. and other problems to achieve the effect of ensuring model consistency and accuracy and low computational cost

Active Publication Date: 2018-05-15
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

In previous studies on the SSSI effect of nuclear power plants, in addition to a small amount of experimental research, the lumped mass bar unit of each plant was usually established for numerical simulation. Its advantages are simple model and fast calculation speed. There is still a certain difference from the actual structure, an

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  • Floor response spectrum simplified calculation method considering SSSI effect
  • Floor response spectrum simplified calculation method considering SSSI effect
  • Floor response spectrum simplified calculation method considering SSSI effect

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Embodiment Construction

[0018] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] The principle of the exemplary simplified calculation method of the floor response spectrum considering the SSSI effect of the present invention is as follows.

[0020] (1) In order to consider the interaction between adjacent structures, it is necessary to model all structures within the influence range together and perform SSI solution when modeling, which will lead to a large number of nodes in the model, resulting in too many degrees of freedom Calculation time is too long. Under the current limited computer resources, the problem of excessive computational cost can be solved by the method of substructure. The substructure method is the process of condensing some elements in the structural model into a hypothetical element with a matrix. This single matrix element is called a superelement in the general finite element ...

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Abstract

The invention belongs to the technical field of nuclear building design, and relates to a floor response spectrum simplified calculation method considering an SSSI effect. The simplified calculation method is combined with two kinds of finite element programs of the general finite element program and the SSI analysis program; on one hand, part of the structure units in a building group are assembled into a unit by means of super-elements in the general finite element program; on the other hand, by means of format conversion of a dynamic characteristic matrix, the SSI analysis program can directly read unit matrix information of the general finite element program, and floor response spectrum simplified calculation considering the SSI effect is conducted by means of a computing kernel of theSSI analysis program. According to the floor response spectrum simplified calculation method considering the SSSI effect, the SSSI effect can be considered in a real, efficient and rapid mode, calculation results conform to reality on the basis of ensuring consistency and accuracy of a model, and the computing cost is low.

Description

technical field [0001] The invention belongs to the technical field of nuclear building design, and relates to a simplified calculation method of floor response spectrum considering SSSI effect. Background technique [0002] In the seismic analysis of nuclear power plants, the floor response spectrum is an important basis for the vibration input of the equipment on the floor. In order to reflect the complexity of the site conditions and the actual stress of the structure, the calculation and analysis usually need to consider the soil-structure interaction (SSI effect). Structure-soil-structure interaction (SSSI effect) belongs to a subfield of SSI effect, which studies the dynamic response between adjacent buildings under external loads or earthquakes. For a large-scale structure like a nuclear power plant, each building is large in size and adjacent to each other. Simply studying the SSI effect of a single building cannot truly reflect the dynamic response of the structure....

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23
Inventor 孙晓颖吴茜婷孟剑刘玉林隋然
Owner CHINA NUCLEAR POWER ENG CO LTD
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