Thermal contact resistance at the concrete/steel interface of concrete-filled steel columns

摘要

The thermal contact resistance at the steel/concrete interface of circular steel tubular column filled with concrete under transient and high temperature conditions was estimated using IHCP (Inverse Heat Conduction Problem) numerical modeling in conjunction with measured temperature. Direct heat conduction analysis showed that the empirical correlation thus obtained can improve the accuracy of predicted temperature response of composite structural elements under conditions similar to fire environment.