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Innovation EngineOur CORE groups manage our research and development efforts, from incremental efficiency improvements to solving some of the most challenging engineering problems of our time.Learn More
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Emily Kunkel discusses green hydrogen’s potential to support cleaner energy, industrial decarbonization and long-duration energy storage in USA Today’s “Hy-Powered.”
Recent legislative changes in the U.K. are encouraging the adaptive reuse of buildings as a way to lower the embodied carbon in construction and help meet net zero goals.
Hail storms pose substantial risks to property and an array of challenges to various stakeholders, including insurance companies, roof manufacturers, and owners and design teams making decisions on the serviceability of exterior materials. This paper introduces an analytical model that can simulate hail impact (see also simulation videos).
In the heart of Silicon Valley, a team from our Applied Science practice is crossing disciplinary boundaries, applying their engineering expertise to aid in the advancement of medical science.
Multi-span cast-in-place (CIP) post-tensioned concrete (PS) box girder bridges undergo upward deflection (curl) at hinges due to post-tensioning forces. Adjustments in falsework height are often necessary in the field to address the curl and avoid bumps, which cause traffic safety concerns and present a road hazard. A current method to estimate hinge curl has often led to results that are significantly different than those measured in the field thus causing construction delays and costly change orders.
This paper discusses the laboratory testing of wall-like reinforced concrete (RC) columns externally confined with glass fiber reinforced polymer (GFRP) laminates and subjected to pure axial load. Specimens were characterized by an overall length of 3.05 m (10 ft), cross-sectional dimensions of 356 by 1,041 mm (14 by 41 in). Three specimens were tested: one was unstrengthened (benchmark) and two were confined with GFRP laminates. Two different confining reinforcement ratios were considered.
Accurate prediction of instantaneous and time-dependent deformation of superstructure in-span hinges is important for preventing a mismatch of bridge decks. Time-dependent deflection of in-span hinges hinge curl in posttensioned bridges depends on the construction sequence and the material time-dependent properties. Structural analysis software is an important tool for estimating time-dependent deformations. Computational modeling was conducted to calculate the hinge curl in posttensioned bridges considering two approaches, the spine model and the three-dimensional finite-element model.