详情

原文传递 Replacement Prioritization of Precast Deck Panel Bridges.

题名：	Replacement Prioritization of Precast Deck Panel Bridges.
作者：	AYOUB, A.; DESHMUKH, G.; GUALTERO, I.; MULLINS, G.; PAI, N.; SEN, R.
关键词：	Bridges-Structures; Replacement-; *Prioritization-.;Degradation-; Bridge-inspection; Finite-element-method; Highway-safety; Bridge-decks; Failures-.
摘要：	Precast deck panel bridges have a long history of premature deterioration in Florida. A ten year, $78 million program is currently underway to systematically replace selected deck panel bridges in Districts 1 and 7 with full-depth, cast-in-place concrete decks. As not all the bridges are in the same state of disrepair, a strategy was needed to objectively rank relative deterioration and thereby optimize the replacement process. The goal of this research project was to develop a simple, rational procedure that would assist in prioritizing the replacement of deck panel bridges in Districts 1 and 7. Originally, it was envisaged that this goal would be met using three-dimensional finite element analysis. The numerical model would be calibrated using inspection records, laboratory testing, and limited non-destructive field evaluation to identify bearing support for the panels. However, a literature review and responses from a survey of State DOTs indicated that non-destructive evaluation using ground penetrating radar would not be suitable for this application. Therefore, a modified approach was developed in which greater emphasis was placed on inspection data and on the on-site forensic studies of the deck panel bridges being replaced. The forensic studies yielded data that permitted the development of a progressive degradation model. This model was the basis for the ranking procedure and was incorporated into a computer program (PANEL) developed for this study. PANEL uses information on deterioration from inspection reports, along with other factors (e.g., importance of the bridge), to arrive at rankings for replacement.
报告类型：	科技报告