Research And Application Of Grey Theory In The Construction Control Of Continuous Rigid Frame Bridge

Continuous rigid frame bridge has been developing rapidly in recent years, for it's outstanding spanning capability, good working force condition, fine structural integrity, construction craft relatively simplicity and continuous deck making driving comfortable, moreover, capital investment and maintenance expense is very lower. Nevertheless, the work to construct a continuous rigid frame bridge is a complicated course, in which will be affected by a great deal certain and uncertain factors, and will result in departure of actual state from perfect state, consequently, it become indispensability to apply reasonable forecast method to monitor stress and distortion.Grey of line shape and stress control of continuous rigid frame bridge is interpreted based on temperature,CREPT and elastic modulus;According to conception of grey correlation analysis theory, stress grey correlation analysis conception is introduced and predominance analyses is performanced. GM(1,1) model is discussed to the stress forecast, relative merits of several methods is maked out on the basis of data moving average about theoretical stress and measured stress. Metabolic even dimension data model is imported in the thesis. And three betterments of classic GM(1,1) is accomplished, residual GM(1,1) model is studied on the forecast of stress and scale height in the continuous rigid frame bridge, simultaneity, Markov chain is used to modification of forecast and grey-markov model come into being, whose merits including creditable precision, un-require quality of data and abroad applicability ,which is validated through stress and scale height of continuous rigid frame bridge.Optimization and method improvement on the grey theory forecast is performanced in the paper, including three methods to enhance to the precision and two means to disposal the raw data. Suggestion and technique to the tackle and use of new and stale data is formulized clearly. Combination Grey and Markov is used to the construction control of continuous rigid frame bridge.The method and theory put forward in the theses is validated through supervisory control of Huluding Bridge in Nanning,which testify that grey theory is applicable for line shape and stress control of continuous rigid frame bridge,and expose the high theoretical significance and practical value.