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Code and Title:
     ICTAG I576: Typical Applications and Instrumentation

Principal InvestigatorAssist. Prof. Dr. Haluk Sucuoglu (homepage)


     The methodologies developed for the seismic vulnerability assessment of existing buildings will be applied to a group of state owned buildings. Those buildings identified as seismically vulnerable will be classified according to their structural parameters, types of weaknesses they display, and the geotechnical parameters at the site. One building in each group, not exceeding 5 will be rehabilitated by using the rapid retrofit techniques and methodologies, which will also be developed in this study.

    Structural engineering deals with the safe and economic design of structural systems. To this end the engineer must tackle the important task of representing physical reality as a mathematical abstraction that will permit him to predict with confidence the way that the assembly of components will behave when subjected to external effects. The word “behavior” encloses a number of connotations. First, the deformations caused by the effects must be calculated so that steps can be made to limit them to acceptable levels. Similarly, forces, stresses, or long-term strains must all be calculated, or the strength of individual members must be determinable so that these can be compared with analysis results. Analysis, on the other hand, depends on a number of simplifying assumptions because otherwise even simple structures would require lengthy and expensive calculations.

    For earthquake ground motions this situation is even more complicated because of the additional sources of uncertainty such as three-dimensional effects, influence of “non-structural” components, and spatial variability. For improved understanding of dynamic structural response, engineers have three recourses:

  • Build computer models of variable complexity and conduct numerical experiments, leading to identification of important modalities of response,
  • Build scaled laboratory models, subjecting them to static or quasi dynamic or even true dynamic loads, matching observations against numerical predictions,
  • Place sufficient measuring devices on full-scale structures, and record their response when subjected to the real experiment that an earthquake is. This way, the correctness of any theory or idealization can be calibrated.

    For this reason, the incorporation of the building seismic monitoring component into the project proposal is considered as being necessary.

Keywords: Earthquake, reinforced concrete, repair, strengthening, earthquake response, seismic monitoring, instrumentation