Analysis of Cable Force of Cable‐Stayed Bridges Based on Fast Iterative Method of non‐Stress State

Abstract Combined with typical cable‐stayed bridge construction, in order to achieve the target state of designed bridge, how to quickly and accurately determine the cable force value of cable‐stayed cable during construction is studied. Based on the principle of traditional non‐stress state method and taking into account the effect of shrinkage and creep of concrete, a new calculation method of rapid iteration of non‐stress state is proposed, and the applicability of traditional non‐stress state method and differential formal iteration method is compared and analyzed, The research results show that the three calculation methods can reach the accuracy requirement of 3% after multiple iterations, but the traditional non‐stress state method needs two iterations, the difference formal assembly iteration method needs four iterations, and the non‐stress state fast iteration method can reach the accuracy requirement of 3% after one iteration, and the high precision requirement of 0.01% can be reached after four iterations. The proposed stress‐free state fast iteration method is simple and practical, greatly improves the calculation efficiency and accuracy, and has strong engineering applicability and feasibility.