Study on applicability of distributed optical fiber measurement method to prestressed concrete members

Abstract

As a technology for measuring strain changes in prestressed concrete (PC) members, we are focusing on distributed optical fiber sensors that are highly durable and capable of measuring the strain distribution of an entire structure. Strain was measured using this sensor in loading experiments and outdoor long-term exposure experiments on PC members. As a result, it was confirmed that measurement using this sensor is effective as a method for understanding the bending behavior and long-term strain fluctuations when an external force acts on a PC member. In addition, as a result of examining a method for evaluating the effective prestress of PC members from the obtained strain, we found that it was necessary to consider the influence of the installation environment.