All deck elevations are on the top of structural beams 所有甲板標高線均指結構梁頂線。
Based on the differences between the design value and the survey of the bridge deck elevation in constructing the pre - stressed long span bridge , the model parameters are identified by the genetic algorithm , and the pre - stress loss values of different sections are given 建立附加損失的數(shù)學模型,根據(jù)施工時的預應力張拉后橋面實測標高與設計值的差異,用遺傳算法識別損失模型的參數(shù),確定有關各截面的損失值。
A model with some parameters is used to forecasting the beam camber in the construction . based on the differences between the design value and the survey of the bridge deck elevation in constructing the pre - stressed and so on working condition , the model parameters are identified by ann , and the beam camber of different sections are given 建立施工預拱度的數(shù)學模型,根據(jù)施工時的預應力張拉后等工況橋面實測標高與設計值的差異,用bp神經網(wǎng)絡識別預拱度模型的參數(shù),確定有關各截面的預拱值。