A dynamic time history analysis method for a super high-rise structure

Abstract

The invention relates to a dynamic analysis numerical simulation method for a super high-rise structure. The unconditionally stable dynamic time history analysis method for the super high-rise structure with the high-order precision comprises the following steps that 1, spatial finite element dispersion is conducted on the super high-rise structure, a finite element model dispersion system of thesuper high-rise structure is established, and a motion equation set of the dispersion system is exported according to the Hamilton principle; 2, calculating an equivalent dynamic load; 3, selecting atime step length; 4, calculating time step by step, and calculating the displacement, speed and acceleration of each time step at the end moment; Compared with a traditional second-order dynamic time-history analysis method such as a Newmark method, the dynamic time-history analysis method has the advantages of being high in precision order, high in calculation efficiency and the like, false high-frequency modes caused by spatial dispersion can be filtered out, operation steps are simple, implementation is easy, and high engineering application value is achieved.

Description

technical field [0001] The invention relates to a dynamic analysis numerical simulation method of a super high-rise structure, in particular to a dynamic time-history analysis method of a super high-rise structure that is unconditionally stable and has high-order precision. Background technique [0002] The large scale of super high-rise buildings is conducive to my country's urbanization. In recent years, the number of super high-rise buildings in China has increased. Although super high-rise buildings meet the needs of urbanization, there are earthquake risks. After investigation, it is found that a considerable part of these super high-rise buildings are currently located in high-intensity earthquake-resistant fortified areas, and they are at risk of experiencing strong earthquakes. Once these super high-rise buildings collapse in a strong earthquake, they will suffer heavy losses. In order to ensure the safety of super high-rise buildings under strong earthquakes, it is ...

AI Technical Summary

Problems solved by technology

At present, a variety of high-order precision dynamic time-history analysis methods have been proposed in the existing technology, but the size of the equations solved by these analysis methods in each analysis step is at least twice or even several times the size of the equations solved by the second-order precision method , so although the solution accuracy of each step is improved, the calculation amount of a single step is significantly increased, and the efficiency improved by increasing the time step is greatly reduced, so it has not been substantially promoted.

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