A Research to Cable Force Optimizing Calculation of Cablestayed Arch Bridge

The paper put forward an optimizing calculation method to optimize the cable initial force of cable-stayed arch bridge while in arch rib cantilever erecting. The arch rib cantilever erection of cable-stayed arch bridge has the construction process of cable removal. It is different in cable-stayed bridge or arch bridge. Therefore common influence matrix cannot be used directly. And the optimizing method in the paper is developed by modifying influence matrix. Also the paper develops a program by using ANSYS APDL language. The program is applied in Lian-cheng Bridge. The calculation result is similar to sequential forward algorithm. Finally the arch rib enclosure deviation is within 5 mm. The whole arch curve meets the design request.