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Nonlinear dynamic time-history analysis method for complex building structure

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

Active Publication Date: 2020-02-14
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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  • Nonlinear dynamic time-history analysis method for complex building structure
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  • Nonlinear dynamic time-history analysis method for complex building structure

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[0052] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

[0053] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0054] Taking a complex high-rise structure as an example, the nonlinear fast dynamic time-history analysis method of the present invention is specifically described. Complex high-rise buildings such as figure 1 As shown, the first three periods of the model are T 1 =1.815s,T 2 = 1.579s and T 3 = 0.890s. The dynamic time history analysis method comprises the following steps:

[0055]The first step is to carry out spatial finite element discretization to the high-rise building, an...

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Abstract

The invention relates to a nonlinear dynamic time-history analysis method for a complex building structure, which comprises the following steps of: 1, performing spatial finite element discretizationon the complex building structure, and establishing a motion equation set of a discrete system; 2, selecting parameters and determining global invariants; 3, calculating step by step, and calculatingthe displacement, speed and acceleration of each time step at the end moment. Two key improvements are made on the nonlinear iteration process of the Newmark method, so that the calculation workload is greatly reduced and the calculation efficiency is improved on the premise of ensuring the calculation precision.

Description

technical field [0001] The invention belongs to the technical field of building structure design, and in particular relates 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, frequent earthquakes have caused damage or even collapse of building structures, seriously threatening 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 should be carried out on complex building structures to better grasp the seismic capacity of the structure and ensure the safety of the structure under earthquake action. [0003] Structural nonlinear dynamic time-history analysis is a spatially discrete model of the building structure. In the entire earthquake action time history, the differential equations for the motion of each particle are ...

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Application Information

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Patent Type & Authority Applications(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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