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High Fidelity Modeling of Hail Impact on Metal Roofs
August 20, 2020
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).

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Modeling The Human Heart
July 01, 2019
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.

Insight

Deflection of in-span hinges in prestressed concrete box girder bridges during construction
January 15, 2017
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.

Insight

Wall-Like Reinforced Concrete Columns Externally Confined by means of Glass FRP Laminates
November 07, 2016
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.

Insight

Time-Dependent Analysis of Post-Tensioned Bridge Hinge Curl
September 12, 2016
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.