Articles

Overview of the Prestress Losses and Long-term Deflection Response of Ultra-High Performance Concrete Members

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Abstract

Ultra-high-performance concrete (UHPC) is an innovative material due to its unique properties and performance compared to conventional concrete. UHPC provides a resilient infrastructure and advances systems for sustainable use due to its extreme strength and superior durability under variable loadings and exposures. Although UHPC is a promising construction material, it faces numerous challenges before widespread implementation in the U.S. There are currently no design guides to use UHPC in different infrastructure applications, and accordingly, engineers and owners lack confidence in system performance. This presentation will focus on some challenges facing implementing UHPC in large-scale projects in the U.S. including the discussion of the impact of thermal or steam treatment on prestress loss and the long-term deflection response of UHPC prestressed systems. It also aims to compare models proposed for the time-dependent behavior by different research efforts considering UHPC’s distinguished properties compared to the models available in different U.S. design guides for conventional concrete.

Keywords: UHPC, thermal treatment, prestress loss, deflection, time-dependent behavior, elastic shortening, creep, shrinkage

How to Cite:

Ammari, M. & Ahlborn, T. M., (2023) “Overview of the Prestress Losses and Long-term Deflection Response of Ultra-High Performance Concrete Members”, International Interactive Symposium on Ultra-High Performance Concrete 3(1): 128. doi: https://doi.org/10.21838/uhpc.16731

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