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In this paper, based on the feasible method and technique for full-scale prestressed monitor, the novel optical fiber sensors and the traditional monitoring sensors will be set up into two prestressed concrete beams with same geometrical and physical conditions to investigate the working state of the new sensors and obtain the prestress evolution of the external prestressed feature component under the static load. the results show that the prestressing evolution of loaded beam under the condition of no damage state and initial crack is same as the non loaded one, however the prestressing loss increases with the time under the condition with the limit crack. The prestressing loss of prestressed beam with the limit crack is 36.4% of the total loss. The prestressing loss of the external prestressed member under the static load increases with the development of the crack (damage).1

Experiment of the Monitoring the Life-cycle External Prestressed Members Under Static Loading