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The Reliability analysis of a Gravity Abutment of an Arch Dam

Author: LinMingCai
Tutor: WuQingZuo；ChenZeZuo
School: Hohai University
Course: Architecture and Civil Engineering
Keywords: arch dam gravity abutment stability against sliding reliability
CLC: TV642.4
Type: Master's thesis
Year: 2005
Downloads: 107
Quote: 0
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Abstract

This paper is mainly researched the reliability analysis of a gravity abutment of an arch dam based on conception of reliability. At first,the paper explained the development of the structrue reliability analysis, and simply introduced the basic theory and general progress of the gravity abutment corresponding with definite solution. Based on the basic reliability computation, established the relationship between the load effect(stress or force) and basic stochastic variable dealing with statistical features of variables,and then established the state equation of limit. Based on it, the reliability of the arch dam gravity abutment is analyzed, and the corresponding reliability index β is calculated, meanwhile, the influence of the distribution types, cut-tail and correlation of the stochastic variable on the reliability is discussed.This article through a double-curvature arch dam gravity abutment project example, uses the ’Gong Liang Fenzai’ method to extract the stress of th e dam body, satisfies the standard request in the stress under the condition, uses two methods to the arch dam gravity abutment stably carries on the analysis computation. The first method is uses traditional the security method - rigid body limit zero-method, obtains the safety coefficient can satisfy the standard request. The second method uses the reliability theory, has introduced four random variables in the reliability analysis computation (H, f, c and γ_c), the use establishes the gravity abutment anti- slides the stability limit equation of state, extracts the gravity abutment with the JC law anti- to slide the stable reliability index β, also can satisfy the corresponding standard the request. Thus it can be seen, this project uses two computational methods have obtained the consistent conclusion, namely the gravity abutment anti-slides stably all can satisfy the corresponding standard the request. Because the reliability theory has introduced the random variable, has considered the variable changeability as well as the distribution type, therefore its conclusion has the persuasive power.Through the reliability theory computation analysis, this paper has drawn some beneficial conclusions, may supply the related arch dam gravity abutment engineering design reference and the application. Finally, the paper proposed from now on will need further to study question.

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CLC: > Industrial Technology > Hydraulic Engineering > Water control,hydraulic structures > Dams > Concrete dam > Arch dam
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