A nonlinear dynamic time-history analysis method for complex building structures

A technology of nonlinear dynamics and building structures, applied in geometric CAD, design optimization/simulation, special data processing applications, etc., to achieve the effects of easy promotion and application, guaranteed unconditional stability, and simple steps

Active Publication Date: 2021-02-12
李鲁
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Problems solved by technology

[0005] Aiming at the shortcomings of existing dynamic time-history analysis methods for complex building structures in terms of calculation volume, solution efficiency, and result accuracy, the purpose of the present invention is to make two key improvements to the nonlinear iterative process of the Newmark method, and to provide a method that uses A fast analysis method for nonlinear dynamic time-history analysis of complex building structures under dynamic external loads

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  • A nonlinear dynamic time-history analysis method for complex building structures
  • A nonlinear dynamic time-history analysis method for complex building structures
  • A nonlinear dynamic time-history analysis method for complex building structures

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[0053] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should realize that the present invention covers all alternatives, modifications and equivalents that may be included within the scope of the claims.

[0054] Below in conjunction with accompanying drawing, structure principle and working principle of the present invention are described in detail:

[0055] Taking a complex high-rise structure as an example, the nonlinear fast dynamic time-history analysis method of the present invention is specifically described. The complex high-rise building such as figure 1 shown, the first three cycles of the model are T 1 =1.815s,T 2 = 1.579s and T 3 =0.890s. The dynamic time history analysis method includes the following steps:

[0056]The first step is to perform spatial finite element discretization on the high-rise building, and establ...

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Abstract

The invention relates to a nonlinear dynamic time-history analysis method for a complex building structure, the steps of which are as follows: the first step is to carry out spatial finite element discretization on the complex building structure to establish a motion equation group of the discrete system; the second step is to select parameters And determine global invariant: the 3rd step, calculate by time step, calculate the displacement, velocity and acceleration at the end of each time step; The present invention carries out two key improvements to the non-linear iterative process of Newmark method, in guaranteeing calculation accuracy Under the premise, the calculation workload is greatly reduced and the calculation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of building structure design, in particular to a fast analysis method for nonlinear dynamic time history analysis of complex building structures under the action of dynamic external loads. Background technique [0002] In recent years, earthquakes have occurred frequently, causing structural damage or even collapse, which seriously threatens the safety of people's lives and property. Therefore, the domestic building structure design code requires that in the design stage, nonlinear dynamic time history analysis of complex building structures should be carried out to better grasp the seismic capacity of the structure, thereby ensuring the safety of the structure under the action of earthquakes. [0003] Structural nonlinear dynamic time history analysis is a spatial discrete model of the building structure. In the entire seismic action time history, the differential equations of the motion of each particle ar...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/23
CPCG06F30/13G06F30/23
Inventor 徐俊杰黄羽立曲哲
Owner 李鲁
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