Smart structures and applications in civil engineering

This paper examines the issue of instrumentation for civil structures and in particular discusses the role of sensing systems in the evolution of the smart building concept. The sheer size of most structures of interest presents its own technological challenge in designing a suitable sensing architecture which will also conveniently address the area to be covered and will also provide sufficient sensing points to adequately characterize the structure under test. In addition, the measurement problem itself, which comprises both process monitoring and in use assessment must be defined. The former is very much process specific and may range from assessing whether concrete is dry to ensuring that protective materials are properly installed. The latter is almost entirely concerned with providing an alarm for either the onset of unacceptable corrosion within the structure or the appearance of physical damage for example due to foundation failure. This paper presents an analysis of the principal issues which the civil engineering smart structure must address and derives generic system specifications. It continues to argue that fiber optic solutions are the most appropriate sensing technologies and examines a number of distributed fiber optic technologies which enable both physical and chemical parameters to be addressed throughout a large structure.

[1]  B. Y. Kim,et al.  Perturbation effects on mode propagation in highly elliptical core two-mode fibers , 1990 .

[2]  N. B. Graham,et al.  Distributed sensor for water and pH measurements using fiber optics and swellable polymeric systems. , 1995, Optics letters.

[3]  Mario Martinelli,et al.  Absolute and simultaneous strain and temperature measurements by a coherent optical fiber sensor , 1994, Other Conferences.

[4]  Toshio Kurashima,et al.  Measurement of temperature and strain distribution by Brillouin frequency shift in silica optical fibers , 1993, Other Conferences.

[5]  T. Horiguchi,et al.  Advances in optical time domain reflectometry , 1989 .

[6]  Michel Lequime,et al.  Parallel coherence receiver for quasidistributed optical sensor , 1991, Other Conferences.

[7]  R. Wolff,et al.  Applications with Optical Fiber Sensor System for Monitoring Prestressed Concrete Structures , 1990 .

[8]  Michel Lequime,et al.  Introduction to the BRITE-EURAM II OSMOS project , 1994, Other Conferences.

[9]  A. Kersey,et al.  High-resolution fibre-grating based strain sensor with interferometric wavelength-shift detection , 1992 .

[10]  Alan D. Kersey,et al.  Eight element time-division multiplexed fiber grating sensor array with integrated-optic wavelength discriminator , 1994, Other Conferences.

[11]  Frank Basedau,et al.  Influence of concrete and alkaline solutions on different surfaces of optical fibres for sensors , 1994, Other Conferences.

[12]  Brian Culshaw,et al.  Microwave subcarrier optical fiber strain sensor , 1994, Other Conferences.

[13]  Richard O. Claus,et al.  Fiber optic sensor for simultaneous measurement of strain and temperature , 1991, Other Conferences.

[14]  Richard W Griffiths,et al.  Recent And Current Developments In Distributed Fiber Optic Sensing For Structural Monitoring , 1989, Other Conferences.

[15]  Kenneth F. Dunker,et al.  WHY AMERICA'S BRIDGES ARE CRUMBLING , 1993 .

[16]  Alan D. Kersey,et al.  Structural strain mapping using a wavelength/time division addressed fiber Bragg grating array , 1994, Other Conferences.

[17]  Laurence Reekie,et al.  High reflectivity ad narrow bandwidth fibre gratings written by single excimer pulse , 1993 .

[18]  John P. Dakin,et al.  New optical time domain reflectometry (OTDR) technique for monitoring the range of reflective markers , 1994, Other Conferences.

[19]  William W. Morey,et al.  High-temperature capabilities and limitations of fiber grating sensors , 1994, Other Conferences.

[20]  Brian Culshaw,et al.  Distributed pH and water detection using fiber-optic sensors and hydrogels , 1995 .

[21]  Raymond M. Measures,et al.  Multiplexed Bragg grating laser sensors for civil engineering , 1993, Other Conferences.

[22]  A. McGown,et al.  Background to the design of the quay wall stabilisation works at Kingston Bridge, Glasgow , 1994 .

[23]  J. T. Krause,et al.  Strength and fatigue of silica optical fibers , 1989 .

[24]  Gerald Meltz,et al.  Fiber Optic Temperature And Strain Sensors , 1987, Other Conferences.

[25]  H. Koga,et al.  Strain sensor using twisted optical fibers. , 1984, Optics letters.

[26]  Luc Thevenaz,et al.  Simple distributed temperature sensor based on Brillouin gain spectrum analysis , 1994, Other Conferences.

[27]  Charles R. Kurkjian,et al.  Environmental Effects on the Static Fatigue of Silica Optical Fiber , 1988 .

[28]  K Takiguchi,et al.  Chirped in-fiber Bragg gratings for compensation of optical-fiber dispersion. , 1994, Optics letters.