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Method for determining roadbed retaining wall structure partial coefficient

A sub-item coefficient and retaining wall technology, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve a large number of problems such as verification and statistical analysis, inconvenient engineering design, etc., and achieves strict logic and sub-item coefficient indicators. Accurate, Guaranteed Effectiveness

Inactive Publication Date: 2017-11-28
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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Problems solved by technology

[0017] Compared with the safety factor method, the reliability index method realizes the quantitative description of the reliability, but this method is not convenient for engineering design because it requires a large number of checking calculations and statistical analysis

Method used

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  • Method for determining roadbed retaining wall structure partial coefficient
  • Method for determining roadbed retaining wall structure partial coefficient
  • Method for determining roadbed retaining wall structure partial coefficient

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0041] refer to figure 1 , the present invention is a kind of method that is used for determining subgrade retaining wall structure sub-item coefficient, comprises the following steps:

[0042] ① Design the retaining wall according to the target safety factor stipulated in the original code, and determine the size of the retaining wall under the original code system;

[0043] ②According to the structural design size obtained in step ①, use the Monte Carlo method to calculate the reliability index of the structure;

[0044] ③According to the statistical characteristics and reliability indicators, comprehensively consider the limit state resistance and load mean, standard deviation and correlation coefficient, and calculate the mean value, variance and separation coefficient of functional items based on the general separation method, and derive the sub-i...

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Abstract

The invention relates to a method for determining a roadbed retaining wall structure partial coefficient. The method includes the steps of firstly, performing retaining wall design according to a target safety coefficient regulated by an original specification, and determining the size of a retaining wall under an original specification system; secondly, using a Monte Carlo method to calculate the reliable indexes of the structure according to the structural design size obtained in the first step; thirdly, according to statistical features and the reliable indexes, comprehensively considering the average, standard deviation and related coefficient of resistance and load items in a limit state equation, calculating the function item average, standard deviation and separation coefficient on the basis of a general separation method, and exporting the retaining wall partial coefficient on the basis. The method has the advantages that the partial coefficient in a new specification can inherit the reliability level of an original safety coefficient design method to the maximum extent, logical self-consistency of the safety coefficient, reliability index, partial coefficient and failure probability is guaranteed at the same time, corresponding matching relationships of specific numerical indexes are achieved, and design result consistency is achieved.

Description

technical field [0001] The invention relates to civil engineering, in particular to a method for determining sub-item coefficients of subgrade retaining wall structures. Background technique [0002] Retaining wall is one of the common structural types in railway embankment engineering, and its reliability is generally concerned by engineering circles. my country's current reliability design standards generally adopt the safety factor design method, but this method is not based on strict probability thinking on the one hand, and on the other hand, it is not in line with the sub-item coefficient design method adopted by the current advanced countries. Therefore, the reliability of retaining walls in my country The gender design standard is transitioning to the sub-item coefficient design method. [0003] The basis of engineering structure reliability design is the limit state equation, which is generally expressed as: [0004] Z=R-S=0 [0005] Among them, R and S are resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 王占盛罗一农高柏松李安洪魏永幸郭海强徐骏杨泉肖飞知
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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