Title: Construction stresses in the world’s first precast concrete network arch bridge
Date: September-October 2015
Volume: 60
Issue: 5
Page Numbers: 30-47
Author(s): Hossein Yousefpour, Todd A. Helwig, and Oguzhan Bayrak
https://doi.org/10.15554/pcij.09012015.30.47

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Abstract

This paper reports some of the major findings from the instrumentation of the West Seventh Street Bridge in Fort Worth, Tex. This innovative bridge, completed in 2013 as a replacement for a century-old bridge, consists of 12 prestressed, precast concrete network arches. The bridge was instrumented with 224 vibrating-wire gauges that were embedded in the arches prior to concrete placement. The gauges were monitored during posttensioning, handling, and transport as well as deck construction. The instrumentation provided data on the stresses induced in the arches, which were used to ensure a safe environment throughout construction. The measurements also provided a means for evaluating the accuracy of stress calculations that were made during design. The results obtained from this study provide a unique insight into the behavior of concrete arches built by an accelerated construction method.

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