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A TV Tower Earthquake Damage Prediction and Evaluation Method

A TV tower, earthquake damage technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of time-consuming and labor-intensive, the lack of timeliness of prediction results, etc., to achieve the improvement of calculation efficiency and good applicability Effect

Active Publication Date: 2018-07-06
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the shortcomings of the existing TV tower earthquake damage prediction using finite element calculation which is time-consuming and laborious, and needs to accurately understand the structural details of the TV tower, and the prediction results lack timeliness, and proposes a TV tower earthquake damage prediction assessment method

Method used

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  • A TV Tower Earthquake Damage Prediction and Evaluation Method
  • A TV Tower Earthquake Damage Prediction and Evaluation Method
  • A TV Tower Earthquake Damage Prediction and Evaluation Method

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specific Embodiment approach 1

[0039] Specific implementation mode one: the specific process of a TV tower earthquake damage prediction and evaluation method in this embodiment mode is as follows:

[0040] Step 1, determine the TV tower parameters;

[0041] TV tower parameters include tower height h, TV tower total height H, PGA and earthquake damage index;

[0042] Determine the PGA value according to the local intensity of the TV tower;

[0043] PGA is the peak ground acceleration, in cm / s 2 ;

[0044] Step 2. If the parameters of the two situations exist at the same time, then use formulas 1 and 2 to calculate respectively, and use the general formula 3 to represent the earthquake damage grade index when the earthquake damage is relatively large;

[0045] The two case parameters are:

[0046] Case 1: Take the tower height and PGA as variables;

[0047] Case 2: Take the total height of the TV tower and PGA as variables;

[0048] ID=max[ID i ] j (3)

[0049] In the formula, ID i They are the ear...

specific Embodiment approach 2

[0051] Specific embodiment two: the difference between this embodiment and specific embodiment one is: determine the TV tower parameter in the described step one;

[0052] TV tower parameters include TV tower name, tower height h, total height H, PGA, maximum story displacement angle and earthquake damage grade index;

[0053] The specific process is:

[0054] According to the relevant literature, the corresponding relationship between the interstory displacement angle of the radio and TV tower, the earthquake damage level and the earthquake damage level index is determined. Earthquake damage grade, earthquake damage grade index ID, interstory displacement angle θ u The correspondence among the three is shown in Table 1.

[0055] Table 1 Damage grade index and damage grade division standard

[0056]

[0057] The parameters of the TV tower include the name of the TV tower, the height h of the tower body, the total height H, PGA, the maximum interstory displacement angle a...

specific Embodiment approach 3

[0074] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: when the tower body height and PGA are used as variables, the prediction formula of the TV tower earthquake damage index ID with a confidence interval of 95% is obtained by fitting (1) The specific solution process is:

[0075] According to h and PGA, using surface fitting, the fitting model is:

[0076]

[0077] In the formula, p 00 ,p 01 ,p 02 ,p 03 ,p 04 are coefficients, all are real numbers;

[0078] After surface fitting and guarantee the confidence interval is 95%, the value and range of each coefficient, where the value is the expected value of the data range;

[0079] p 00 The value range is -57.74≤p 00 ≤138.2,p 00 Take 40.22;

[0080] p 01 The value range is -8.881≤p 01 ≤3.258, p 01 Take -2.881;

[0081] p 02 The value range is 0.03451≤p 02 ≤0.3215, p 02 Take 0.178;

[0082] p 03 The value range is -5.387e-005≤p 03 ≤2.28e-005,p ...

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Abstract

The invention relates to a method for predicting and evaluating an earthquake damage of a television tower, and aims to solve the defects that the earthquake damage of the existing television tower is predicted by employing finite element calculation so that both time and labor are wasted, and structural details of the television tower need to be known accurately so that a prediction result lacks the timeliness. The method comprises the following steps: step 1, determining television tower parameters, wherein the television tower parameters include a tower body height h, a television tower total height H, a PGA and an earthquake damage grade index; and according to a local intensity of the television tower, determining a PGA value; step 2, if two condition parameters exist simultaneously, expressing the earthquake damage grade index by employing ID=max[IDi]j, wherein the two condition parameters are as follows: 1: the tower body height and the PGA are taken as variables; and 2: the television tower total height and the PGA are taken as the variables; and step 3, querying the earthquake damage grade index ID and a damage grade classification standard, and determining a damage grade of the television tower. The method related by the invention is used in the field of television tower earthquake damage prediction and evaluation.

Description

technical field [0001] The invention relates to a television tower earthquake damage prediction and evaluation method. Background technique [0002] Broadcasting and TV towers are often taller. As a special high-rise building structure, as the height increases, the functions are diversified, and its structural form is also constantly developing. From the original 221.2m to the current 610m, the TV tower has been continuously improved not only in height but also in structure. It has also evolved from a single function such as communication to a comprehensive building integrating communication and entertainment. Become a landmark building of the city. [0003] The structural types of TV towers are mainly reinforced concrete structures and steel structures. At present, among the large-scale TV towers that have been built in my country, steel structure towers account for about 70%, and reinforced concrete structure towers account for about 30%. Steel structure towers are grad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 孙得璋张昊宇王明振陈洪富毛晨曦
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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