Abstract
Fuzzy logic is a useful tool when assessing the existing reinforced concrete structures. The introduction of expert system in assessing the technical condition of the existing structures built on the fuzzy logic represents a transition to a new and higher-quality level for the survey of constructions sites. The paper presents the principle of development and implementation of expert system for assessment of the damages of the existing structures. The process is based on the algorithm in which the input data (crack width and propagation, residual strength of materials, amount and condition of the steel reinforcement, deflection, corrosion level et al.) and information collected at each phase are processed and interpreted in order to define the successive step of the procedure. As a result, it is seen that the assessment of the existing building with precast concrete elements with usage of the proposed fuzzy system is in compliance with the estimation of the qualified experts.
Highlights
In recent years assessment of existing structures is becoming a more and more important engineering task
The standard ISO 13822 [1], defines “assessment of existing structures” as the “set of activities performed in order to verify the reliability of an existing structure for future use”
According to [1], the assessment of the existing structure can be initiated under the following circumstances:
Summary
In recent years assessment of existing structures is becoming a more and more important engineering task. According to [1], the assessment of the existing structure can be initiated under the following circumstances: an anticipated change in use or extension of design working life; a reliability check (e.g. earthquakes, increased traffic actions) as required by authorities, insurance companies, owners, etc.; structural deterioration due to time-dependent actions and influences (e.g. corrosion, fatigue); structural damage by accidental actions (see [2]) As it was shown in [3] the diagnostic process for evaluation of the safety level of existing buildings is based on a decisional tree in which the data information collected at each phase are processed and interpreted to define the successive step of the procedure. The developed expert system is based on the results of the own investigations of the basic variables, which are used for description of the membership function and fuzzy rules
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