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Research Method of System Reliability for Long-span Rigid form Bridge

Author: LuNaiWei
Tutor: LiuYang
School: Changsha University of Science and Technology
Course: Bridge and Tunnel Engineering
Keywords: Continuous Rigid Frame Bridge System Reliability Improved response surface method MATLAB language Parametric analysis
CLC: U441
Type: Master's thesis
Year: 2011
Downloads: 40
Quote: 0
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Abstract


Continuous rigid frame bridge bridge type with its superior characteristics , has been more widely used in the highway , especially in the western mountain across the canyon highway . Uncertainty analysis method of the class structure of the finite element method is used mainly in the safety analysis , the actual project , however , there are many random factors , based on probability theory to analyze the reliability level of continuous rigid frame bridge . In this paper, Ya Lu Expressway Yingjing paragraph the Laba pounds Bridge engineering background , a reliable indicator of construction and operation of components and system reliability calculation method of research , specific research work includes : (1 ) Introduction reliability calculation method and realization in MATLAB language platform . Of MATLAB, the GUI functionality compiled reliability calculator . It integrates a variety of reliability calculation method , component reliability and system reliability calculation . (2 ) in the secondary sequence response surface method based on the proposed change response surface method . After a numerical example , the algorithm can guarantee the accuracy of the premise , quickly and accurately fitted performance function to solve the problem of large -span continuous rigid frame bridge there is no explicit functions . (3 ) Bridge Laba pounds engineering background , to establish the simulation model of the construction phase and the system reliability analysis . On the basis of the change should be the response surface method , fitting multiple failure of the largest bridge cantilever construction stage and bridge operators load combination function on the main failure mode analysis to calculate the system reliable indicator . (4) performed a sensitivity analysis on the main parameters affecting the Laba pounds Bridge reliability level . On this basis can clear continuous rigid frame bridge construction process should focus on controlling construction parameters , in order to improve the construction quality control initiative , to ensure that the construction and operation period , the bridge can reach the target reliability index .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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