Method for determining reasonable bridge completion state of main girder cable-stayed bridge with longitudinal slope

Abstract

The application discloses a method for determining a reasonable bridge completion state of a main beam of a cable-stayed bridge with longitudinal slope, and comprises the following steps: S1, simplifying the main beam of the cable-stayed bridge into a rigid support continuous beam with longitudinal slope; S2, initializing support reaction force of the rigid support continuous beam under the action of only dead load of the main beam of the cable-stayed bridge; S3, solving a bridge longitudinal force of a stay cable; S4, calculating a horizontal force that should be applied to the rigid support continuous beam at the support; S5, applying the horizontal force at each support to the rigid support continuous beam, and recalculating the support reaction force; S6, updating the vertical force of the stay cable, and repeating the steps of S3 to S6 until the support reaction force converges; and S7, determining a bridge completion state parameter of the stay cable. The application can effectively solve the calculation deviation caused by the nonlinear effect of the horizontal force of the stay cable on the main beam and the longitudinal slope, significantly improves the accuracy and efficiency of the bridge completion state calculation, and provides a reliable theoretical tool for shape finding of the bridge completion state of the cable-stayed bridge.

Images