Condition Assessment of a First Generation Precast Prestressed Bridges in Slovakia

Abstract

AbstractDiagnostic surveys and structural analyses conducted by the Department of Structures and Bridges have shown the growing number of a first generation precast prestressed structures with deterioration signs. The consequences of a deficient conceptual design and inadequate maintenance will be shown using practical examples of three precast bridges under emergency condition close to collapse state. These bridges were built in the 1960s. Fortunately, the early closure of those bridges has prevented fatal consequences. On the other hand, this state has been offered the opportunity to analyze those bridges step by step. The paper summarizes some findings from visual inspection, diagnostic survey, in-situ and laboratory testing. The results can help to assess the functionality of similar bridge structures and show how important is a visual routine inspection combined with quantitative information from detailed structural analysis.KeywordsVisual inspectionBrittle failureAssessmentStructural analysisDiagnostic survey