Environment Of Suspension Bridge,influence Of The Construction Error To Bridge Condition And Procedure Development

Suspension bridge has become the mainly bridge type across the river,harbor and other obstacles for its good mechanical properties, the ability to leap large, beautiful lightand many other advantages. In view of long-span suspension bridge, the paper conducted research on theoretical value analysis of anchor strand tension and base strand linear and the errors on the impact of the bridge condition ,basing on YuZui Yangtze River Bridge.First of all, the thesis derivated detailly formula of main cable linear and unstressing length in the application of parabola method and catenary method.In order to calculates precisely unstressing length , cable long amendment in the saddle must be considered.Secondly, the paper analyzed strand tensity in anchor and benchmark strand linear. Regarding the former, as the basis of reasonable cable distribution patterns, proposed accurate calculation method of strand even curved tangential point .vertical bending and non-stress length ,compare the characteristics of the approximate calculation method and precise calculations; Regarding the latter, proposed controling point of strand cross-identification and datum strand equilibrium selection, considering cable length, span, main tower of the pre-elevation and the overall effects of temperature in the influence elevation, the control of cable-based elevation provides a theoretical basis.Finally, useing the partition catenary lineation to catenary numerical calculation procedures of suspension bridge, obtained the bridge linear, the spatial cable linear and the unstressing length, on this basis, transformed the two issues into academic research programs using FORTRAN,carried on the comparison with YuZui Bridge's analysis of theoretical calculations.