Simulation of prestressed concrete channel quality test by different electric heating method

Due to lack of effective detection method, channel quality accidents of post-tensioned concrete construction cannot be discovered on time. An infrared detection principle based on electric heating is intended to be put forward to solve the above mentioned problem. Two main electrify methods, continuously or intermittently, are discussed. The results of the numeric simulation on the temperature field of a prestressed concrete component indicate that the electric heating infrared detection technology, for its energy consumption, efficiency and safety, is feasible for detecting the channel quality of prestressed concrete component, but the electrify method, continuously or intermittently, needs to be designed to avoid high thermal stress which will damage the strand and the concrete.