基于重大工程结构健康监测的高精度要求，光纤光栅传感技术应运而生。
Based on high accuracy requirement of the great project structure health monitoring, fiber optic Bragg grating sensing technology arises.
混凝土是土木工程中应用最广泛的结构材料，重大工程结构的使用期长达几十年、甚至上百年。
Concrete is one of popular engineering structural materials. Some momentous concrete structures must be used for decades even hundreds years.
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