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Method for quickly determining equivalent form of seismic load

A technology of seismic load and form, applied in the field of effective form, can solve the problem of not providing a method for determining the equivalent form of seismic load, and achieve the effect of accurate seismic load and simple implementation method

Pending Publication Date: 2022-04-29
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

The above-mentioned patents all calculate the response of the structure or rock and soil under the earthquake, but do not provide a method for determining the equivalent form of the earthquake load

Method used

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  • Method for quickly determining equivalent form of seismic load
  • Method for quickly determining equivalent form of seismic load
  • Method for quickly determining equivalent form of seismic load

Examples

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Embodiment 1

[0075] In this example, the seismic kobe wave is taken as an example, and the rock type is marble. The process of determining the equivalent form of the seismic load in this embodiment is as follows:

[0076] Step 1. According to the seismic acceleration time-history curve, based on mathematical integration (or based on software SeismoSignal), convert the seismic velocity time-history curve into a seismic velocity time-history curve. Among them, the acceleration time-history curve of the seismic kobe wave, such as figure 2 As shown, using SeismoSignal software, the seismic kobe velocity time-history curve can be obtained, such as image 3 shown.

[0077] Step 2. According to the seismic velocity time-history curve, find out the maximum positive velocity V1 and negative velocity V2, and find out the time period in which the seismic velocity changes the fastest. In step 2, according to the seismic velocity time-history curve, it can be concluded that the maximum positive vel...

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Abstract

The invention belongs to the technical field of earthquake loads, and particularly discloses a method for rapidly determining an earthquake load equivalent form. Comprising the following steps: acquiring a time period with the fastest seismic velocity change according to the maximum positive velocity and the maximum negative velocity of a seismic velocity time history curve; according to the maximum positive velocity and the maximum negative velocity of the earthquake and the physical and mechanical parameters of the rock sample, the maximum positive load and the maximum load of the earthquake load are obtained; calculating the average change rate of the seismic load according to the time period in which the seismic velocity changes fastest; the method comprises the following steps: performing equivalent treatment on seismic waves by taking triangular waves as a basic wave pattern, and acquiring an equivalent form of the seismic load based on the maximum positive load and the maximum load of the seismic load and the average change rate of the seismic load. The invention provides a method for quickly determining the equivalent form of the seismic load, the seismic load is simplified into the variable-amplitude cyclic load, and the seismic wave is equivalently processed by taking the triangular wave as the basic wave form, so that the equivalent seismic load is more accurate, and the implementation method is simple.

Description

technical field [0001] The invention belongs to the technical field of seismic loads, and more particularly, relates to a method for quickly determining the equivalent form of seismic loads. Background technique [0002] Under the action of ground motion, large-scale rock mass projects such as traffic tunnels, slopes, hydropower caverns, etc. are easy to fail, or even destroy, causing immeasurable damage to the life and property of the country and the people. Therefore, it is necessary to prevent earthquakes. conduct research. Ground motion is the vibration of the rock and soil layers near the surface caused by the seismic wave released by the source, which is the external cause of earthquake damage. Vibration loads of varying sizes, namely low-cycle and high-amplitude cyclic loads, according to the law of amplitude and frequency changing with time, seismic loads can also be called random cyclic loads. The simple processing method is to convert it into equal-amplitude load...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 周永强盛谦付晓东丁海锋周宁希
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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