Abstract
Seismic damage is significant for civil structures like bridges, highways, gas pipelines, water pipe lines and sewerage pipelines. Sewerage pipeline breakage is reported in some erthquaque. It is important to know fracture of the sewerage pipelines after the earthquakes even though the recover of the sewerage pipelines are not emergent. To know the damage, a low-cost structural-health-monitoring system is required. In the present study, a new distributed fracture sensor is developed using glass comp9osites and a tiny embeddable in glass composite structures. The new fracture sensor is made from glass composites and carbon black composites. In one of the surface layers, the glass fiber is cut to make a crack starter. When large deformation is loaded, a crack start to grow, and the crack breaks electric conductance of the carbon black layer embedded in the glass composites. This causes electric voltage change, and the change is monitored through the Internet. Several experiments are performed to confirm the effectiveness of this system here. As a result, this system successfully provided the fracture information through the Internet
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