- Author
- Taylor, A. W. | Stone, W. C.
- Title
- Evaluating the Seismic Performance of Lightly-Reinforced Circular Concrete Bridge Columns.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- National Earthquake Conference, 1993 Proceedings. Earthquake Hazard Reduction in the Central and Eastern United States: A Time for Examination and Action. Volume 2. Mitigation of Damage to the Built Environment. May 2-5, 1993, Memphis, TN, 543-552 p., 1993
- Keywords
- bridges (structures) | reinforced concretes | columns | seismic performance | hysteretic failure model | equations | regression rate | sensitivity | retrofitting | seismic design
- Abstract
- The ability to analytically predict the inelastic dynamic behavior of reinforced concrete bridge structures during earthquakes is dependent on the availability of appropriate hysteretic failure models. To date, several such models have been implemented in research computer codes. However, little information is available concerning the selection of appropriate parameters for the solution of specific types of reinforced concrete structures. As part of an effort to develop an integrated seismic design procedure (ISDP) for reinforced concrete bridge piers, the National Institute of Standards and Technology (NIST) is conducting extensive studies of hysteretic failure models and laboratory data from tests of bridge columns subjected to cyclic lateral loading. A digital database of load-displacement histories has been established for circular, spirally-reinforced bridge columns. A system identification analysis was performed to determine optimal values of three hysteretic failure model parameters for each test specimen. Subsequent regression analyses were conducted to develop equations correlating the hysteretic failure model parameters to the material and geometric properties of the specimens. The availability of closed form equations for the model parameters permits an a priori inelastic dynamic solution for spirally-reinforced bridge columns. These equations also reveal information about the seismic performance of this class of member. The implications for seismic retrofitting of lightly reinforced circular columns are discussed.