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A simple quantitative approach for post earthquake damage assessment of flexure dominant reinforced concrete bridges
Authors:Asaollah Bassam  Amirhossein Iranmanesh  Farhad Ansari
Affiliation:aCTL Group, 5400 Old Orchard Rd, Skokie, IL 60077-1030, United States;bCivil and Materials Engineering Department, University of Illinois at Chicago, 842 West Taylor St, Chicago, IL 60607-7023, United States
Abstract:Conventional methods for displacement based condition assessment of bridges solely rely on the maximum level of displacements experienced by the piers, and do not take into account the accumulated damage that result from cyclic loading. More advanced approaches take this into account by considering the structural damage as a linear combination of the normalized maximum displacements and hysteretic energy. Computation of the dissipated hysteretic energy requires monitoring of the lateral forces during the seismic events, which are not as practical as monitoring bridge pier deformations. This article reports on the development of a simple damage assessment method that considers the effect of cyclic loading on the state of damage and it is merely based on monitoring the bridge pier deformations. A fiber optic displacement serial array was designed for measuring the crack opening displacement reversals at the plastic hinge areas.
Keywords:Bridges  Columns  Damage assessment  Ductility  Earthquakes  Fiber optic sensors  Low cycle fatigue  Post seismic  Structural health monitoring  Damage index
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