Construction Control Of Steel Truss Cable-stayed Bridge And Emulational Calculation Of Main Towers’Anchorage Zones

The thesis concisely summarized the chief theory of bridges’ construction control.TakeYuJiang bridge for example, the thesis elaborated the application of adaptive constructioncontrol in steel truss cable-stayed bridge.By using finite element software MIDAS,The thesis, taking forward-calculationmethod,simulated the construction process of YuJiang bridge’s steel truss and calculated thetheoretical alignment and predicted the altitude of steel truss which can be used to guide steeltruss’construction towards appropriate completion state and check the stress state duringconstruction.When simulating the construction of midspan,the thesis used least square method torecognize sensitive parameters(steel truss’ dead weight and elastic modulus).The thesis usedtwo methods to predicte the altitude of steel truss:one is adding the altitude of the end ofcantilever with the deflection of the next steel truss and the other is kalman filter method.Thethesis compared the two methods and made a conclution that both two methods’ predictingprecision depend on the precision of theoretical model.On main towers’ anchorage zones where the status of stress is complex and stressconcentration may easily happen, by means of finite element software ANSYS, the thesismade simulation analysis to perfect the stress control in construction control.The results ofsimulation analysis showed that the main towers’ anchorage zones meets the requirements ofstrength during construction.