Dominion Engineering, Inc.’s Post

"Main Cable Inspection and Strength Evaluation of Helicoidal Strand  Main Cables Using a Modified NCHRP Evaluation Approach" -Jorge Perez Armino, P.E., P.Eng. & Ahsan Chowdhury, P.Eng. - IABSE Symposium Istanbul 2023 ABSTRACT  The A. Murray MacKay Bridge (MacKay Bridge) opened to traffic in 1970 and carries four lanes of traffic over the Halifax Harbour between Dartmouth and downtown Halifax, Nova Scotia, Canada. The Bridge's main cable has been opened for detailed visual inspections several times beginning in 2002. The Owner, Halifax Harbour Bridges, retained COWI North America to perform a strength evaluation in accordance with the National Cooperative Highway Research Program (NCHRP) Report 534- Guidelines for Inspection and Strength Evaluation of Suspension Bridge Parallel Wire Cables. As the MacKay Bridge main cable is composed of 61 parallel strands with helicoidal wires, the NCHRP 534 approach (intended for parallel wires) was modified to perform the strength evaluation for cables with helicoidal wires. Based on the analysis performed, it was determined that the main cable of the MacKay Bridge has adequate capacity at this time. Additional measures to protect the cable, mainly through dehumidification, could be considered to prevent further deterioration of the main cable and extend the service life of the cable and therefore the bridge. https://lnkd.in/gVaBRbew

💡 This week’s SRPe project spotlight focuses on James A Quinn from The University of Edinburgh who is part of our National Manufacturing Institute Scotland Industry Doctorate Programme. 🚢 James and supervisor Dr Eddie McCarthy worked in collaboration with industry partner Babcock International Group to look at methods for assessing the condition of thick Fibre-Reinforced Polymer (FRP) used in structures such as ships and wind turbines. 🚗 FRPs have typically been used for creating thin, lightweight parts such as the carbon-FRP components found on high-performance cars, therefore much of the understanding of how FRP behaves is based on the modelling of thin samples. However ‘thick’ (up to 200mm) FRP materials are now used for essential components in many modern applications, which has presented challenges in how to carry out testing to determine damage levels. 🔎 By carrying out a range of Non-Destructive testing on thick FRPs as well as mechanical testing, including the novel application of ground-penetrating radar, James’ research has the potential to extend the service life of assets like ships by providing engineers with the knowledge and tools necessary to manage FRP structures effectively Follow the link below to read all about James’ work: https://lnkd.in/eFwX2x3n https://lnkd.in/e3iEeaUf If you missed last week’s project spotlight you can still catch up by following the link below:   bit.ly/3LarLCU   Read about all of our SRPe funded projects here: https://lnkd.in/eBim7kXZ

it's my pleasure to inform you, that our article with entitled:"The effect of the pipe angle and protective inclined apron on the scouring and sedimentation pattern around a semi-buried pipe in a 90◦ mild bend" has been published in Ocean Engineering journal.

Addressing the rising need for liquefaction mitigation. As the demand for liquefaction mitigation beneath existing structures continues to rise, engineers are seeking practical, non-invasive solutions. Our Teretek resin injection boasts a decade of meticulous research, testing, and development. Its high level of accuracy, refined through collaboration with international experts, ensures reliability across liquefiable geotechnical conditions. Following rigorous testing and proven results, our technology is prominently featured in Module 5—a comprehensive guide for engineers seeking best practices in ground improvement design. Learn more about how Teretek resin injection is shaping liquefaction mitigation strategies here - https://bit.ly/3UzAyEB

What’s buzzin’, cuzzin’? MSE’s “10 Decades in 10 Weeks” is looking at the 50’s, when the Dean of Engineering, J. Harold Lampe, merged 3 separate departments and programs to become the new Department of Mineral Industries. #MaterialScience #MaterialScienceEngineering #Decades#ThroughTheDecades #10DecadesIn10Weeks

I would like to introduce recently published paper on CMAS high-temperature corrosion of Environmental barrier coatings (EBCs) . EBCs applied to gas-turbine components require excellent corrosion resistance to molten siliceous debris such as sand or volcanic ash in high-temperature environments while maintaining mechanical integrity.  To date, most research has focused on single-phase rare-earth (RE) disilicates as candidate EBC materials, but here we report the superior corrosion resistance of a dual-phase disilicate composite, namely Gd2Si2O7/Sc2Si2O7 (70/30 vol%). The total thickness of the reaction layer is found to be about 20% less compared to that of single-phase Gd2Si2O7 under the same conditions, indicating that dual-phase RE-disilicate composites are a promising materials system for increasing the lifetime performance of EBCs. S.H. Kim, T. Osada, Y. Matsushita, T. Hiroto, C.A.J. Fisher, and B.K. Jang, “CMAS corrosion behavior of dual-phase composite Gd2Si2O7/Sc2Si2O7 as a promising EBC material”, J. Eur. Ceram. Soc., 43 6440-6448

A correction to the following paper: F. Zhang and M. Rosenfeld Longitudinal stress in buried pipelines near bends or end caps Journal of Pipeline Engineering, 2nd Quarter, June 2018, pp. 73-89. Page 79, 1st sentence of under “Results Comparison” [correct values are in bold] “Based on the pipe dimensions, buried depth, and soil properties listed in Table 1 and Table 2, we determined the soil stiffness in the lateral direction and axial direction as 𝑘 = 𝟑𝟕𝟎. 𝟐 lbs/in2 and 𝑘𝑎 = 𝟕𝟒𝟏. 𝟕 lbs/in2, respectively, …” The incorrect values for 𝑘 and 𝑘a as shown in the paper were carried over from an older draft. The authors apologize for not recognizing the error during proof reading before publication. The figures in the paper were based on calculation with the corrected values and thus the typos do not influence other parts or the conclusion of the paper.

New Paper Alert! Check out our paper titled “Asynchronous Shake-Table Testing of Seismic Resilient Multi-span Bridges Having Buckling Restrained Braces in Bidirectional Ductile Diaphragm” published in the ASCE Journal of Structural Engineering. This paper presents experimental results of an intensive testing program of one bridge implemented with Buckling Restrained Braces (BRBs) in Bidirectional Ductile Diaphragm on top of two shake tables working asynchronously to represent seismic and temperature loads. Results presented in this paper are for BRBs installed in orthogonal directions. A video of this test was published in following YouTube link: https://lnkd.in/ggnqMjZB. https://lnkd.in/gEQU8ap8

#publication A study on factors affecting the wear of steel track undercarriage I am pleased to share that our article is now available in the Journal of Quality in Maintenance Engineering, Vol 29, No. 3, pp. 622-639 (2023), https://lnkd.in/gCS3mK2r. This work is based on the PhD research of Frederick Rich, PhD. Thanks to him, Mehran Shahhosseini and Christopher Kluse Ph.D, CMQ/OE.

Technical Webinar: Structures, Ground Movement, and Geopolymer Stabilization December 19 10AM PST Engineers are often faced with technical challenges created by unforeseen ground movement. Where the integrity of structures is compromised, urgent solutions are required. Geopolymer technology has matured over the 40 years since its inception and now features within the engineer's playbook of technical solutions for ground and structural engineering challenges. Join this session that provides a detailed introduction to geopolymer engineering and specifically focuses on its uses for structures by changes in ground conditions. This sought-after session is crucial for anyone involved in structural engineering. Register now! https://lnkd.in/eCNABY-4