Abstract
The aim of this paper is to present a systematic study on high-temperature creep and post-creep response of structural steels. A wide range of stress levels (0.4‐1.1 of the yield strength) was adopted to span all possible loads when conducting creep tests at temperature range from 300 to 800 °C. Their effects on plain steel Q345B and high-strength steel Q460GJ were compared. After cooling, the residual mechanical properties of the crept specimens were tested and analyzed. Based on the results of the high-temperature creep tests, densely connected network (DenseNet) model was proposed for predicting the creep response of the structural steels at varied temperatures and stress levels. The predicted values obtained from the model were in good agreement with the corresponding experimental results. The validated model is recommended for reference in structural fire design.
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