本文選題：優(yōu)化 + 維修策略��； 參考：《重慶交通大學》2014年碩士論文

【摘要】：橋梁的性能在不確定性環(huán)境和荷載共同作用下逐漸劣化,使得橋梁的安全性能降低,給后期的維修帶來了較高的成本,實施有效的維修策略不僅能提高橋梁的可靠性能,而且還能確保橋梁在各種運營環(huán)境下有足夠的安全性。本文結(jié)合國內(nèi)外相關資料,運用MATLAB程序優(yōu)化,以預期年失效率和累計成本最低作為目標函數(shù),對單構(gòu)件、不同系統(tǒng)、某一座實際簡支梁橋的檢測、維修時間進行了優(yōu)化。 本論文所開展的主要工作有： ①對單構(gòu)件和不同系統(tǒng)的維修策略進行了分析,并在此基礎上建立了維修事件樹模型,在MATLAB計算結(jié)果的基礎上,研究分析了單構(gòu)件和不同配置系統(tǒng)在不同維修策略下的維修概率及相應維修分支的年失效率。 ②計算并分析了單構(gòu)件和不同配置系統(tǒng)的預期年失效率,以預期年失效率和累計成本最低作為目標函數(shù),運用程序優(yōu)化對不同配置系統(tǒng)的檢測和維修時間進行了計算。 ③以某一座實際簡支梁橋為例,編寫了計算該橋梁的橋面板和主梁的失效概率和年失效率的程序命令,并對橋梁的檢測和維修時間進行了優(yōu)化。 通過本文的研究分析得出以下幾點主要結(jié)論： ①系統(tǒng)的年失效率和預期年失效率主要取決于構(gòu)件及不同配置系統(tǒng)。 ②在混聯(lián)結(jié)構(gòu)系統(tǒng)中,可以通過對系統(tǒng)中處在關鍵位置的構(gòu)件進行維修,來有效地提高系統(tǒng)的可靠性能。 ③通過研究分析本文實橋計算出的最優(yōu)維修可知：實施對結(jié)構(gòu)性能影響較大的維修策略的最宜時期通常分布在橋梁運營階段的后半段部分；實施預防性維修的成本較低,而實施必要性維修的成本較高；但必要性維修確對改善系統(tǒng)的性能有顯著的作用。
[Abstract]:Under the action of uncertain environment and load, the performance of the bridge is deteriorating gradually, which reduces the safety performance of the bridge and brings higher cost to the later maintenance. Effective maintenance strategy can not only improve the reliable performance of the bridge, but also improve the reliability of the bridge. It can also ensure that the bridge is safe enough in various operating environments. In this paper, combined with the relevant data at home and abroad, the paper optimizes the detection and maintenance time of a single component, different system and a practical simply supported beam bridge by using the MATLAB program optimization, taking the expected annual failure rate and the accumulated cost as the objective function. The main work of this paper is as follows: 1. The maintenance strategies of single component and different systems are analyzed, and the maintenance event tree model is established based on the results of MATLAB. The maintenance probability of single component and different configuration system under different maintenance strategies and the annual failure rate of corresponding maintenance branches are studied and analyzed. (2) the expected annual failure rate of single component and different configuration systems is calculated and analyzed. Taking the expected annual failure rate and the lowest cumulative cost as the objective function, the detection and maintenance time of different configuration systems are calculated by program optimization. (3) taking a practical simply supported beam bridge as an example, the program command for calculating the failure probability and annual failure rate of the deck slab and main girder of the bridge is compiled, and the detection and maintenance time of the bridge is optimized. The main conclusions are as follows: The annual failure rate and the expected annual failure rate of the system mainly depend on the components and different configuration systems. In the hybrid structure system, the reliability of the system can be effectively improved by repairing the key components in the system. 3 through the research and analysis of the optimal maintenance of the actual bridge, we can know that the most suitable period of implementing the maintenance strategy which has a great influence on the structure performance is usually distributed in the second half of the bridge operation stage, and the cost of implementing preventive maintenance is relatively low. The cost of necessary maintenance is high, but the necessary maintenance plays a significant role in improving the performance of the system.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.7

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本文編號：1947058