Sensitivity Analysis of Creep Effect Parameters Based on 175m-span Extradosed Cable-stayed Bridge

In order to understand the creep effect of Extradosed Bridge, the paper adopted four concrete creep calculation models recommended by Chinese, European, American and Japanese specifications, and conducted single-factor sensitivity analysis of concrete strength, ambient humidity, component theory thickness, maintenance condition and other parameters based on the calculation parameters of each model. The paper concluded the impacts of various factors on creep coefficient of concrete Extradosed Bridge, and proposed parameter impact grades. Pre-camber design of concrete Extradosed Bridge shall fully consider the humidity while performing envelope calculation. The controllable parameters during construction phase should be monitored. Wet curing or steam curing is adopted to reduce the creep effect. (paper)