ppt on INTELLIGENT SKYSCRAPER MONITORING SYSTEM . pdf download

1. ABSTRACT

The collapse of the World Trade Center (WTC) has
reminded us of the importance of structural integrity
Monitoring for improving disaster preparedness and
response. A real-time system based on GPS and optical
fiber sensors for monitoring structural integrity of the
skyscraper has been proposed. In the designed system,
there are 4 RTK GPS receivers atop the skyscraper on the
vertices and 4 groups of several strings of optical fiber
Bragg grating (FBG) sensors deployed along the 4 edges
of the perimeters. The GPS sensors are used to measure
the 3D positions of the vertices so that strain, tilt and
rotation of the skyscraper can be determined. The
vibrations of the skyscraper can be measured directly if an
external reference GPS receiver is used together with the
rover receivers atop the skyscraper at high sampling rate.
The optical fiber Bragg grating (FBG) sensors are used to
measure both strain and temperature. The conceptual
design of the combined system of GPS and optical fiber
sensors was based on the dimensions of the WTC. The
system proposed here may also prove to be useful for the
monitoring of other structures.

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