Model Test and Calculating Analysis of Steel-anchor-box Anchorage Zone for Long-Span Cable-Stayed Bridge

A steel anchor box in cable-girder anchorage zone of a long-span cable-stayed bridge has been studied.Correct element combination and rational length of the cable-girder anchorage zone have been confirmed though analyses.Influence of the structural details,such as the fairing has been considered too.A 3-dimensional nonlinear analysis model of the steel anchor box in the cable-girder anchorage zone was thus established.And the worst zone of the long-span cable-stayed bridge was selected as the test object under static load.A full-scale steel-anchor-box model was used in the test.The main girder model was simplified on the basis that the simulation boundary is rational and efficient.Comparison to the data of finite-element analysis to the test result shows that the proposed finite-element analysis is logical and precise.Combination the finite-element analysis with model test is an effective method to study cable-girder anchorage zone.