Expertise · GM2 Associates, Inc.
Luis Vila is a Vice President and Senior Structural Engineer at GM2 Associates, Inc. in the United States. When a single member controls a bridge's load rating, the owner may have to post the bridge and live with the restrictions that come with it. Luis Vila has met that situation on several bridges, and each time the question was whether the first rating told the whole story.
In Luis Vila's own words.
"I believe in upholding sound engineering judgment at every stage of a bridge project, using software as a powerful tool, but never as a substitute for understanding the underlying mechanics."
In practice, that starts with approaching a project with safety as the foremost consideration. It also means continually validating the behavior of structural models and questioning results that are counterintuitive. When necessary, it means reducing complex problems back to fundamental principles.
Looking past the initial rating
There have been several instances where a particular bridge member was controlling the overall rating of a bridge and potentially leading to the need for posting. In these situations, I was able to draw on my experience and engineering judgment to recognize that the simplified analysis did not necessarily capture the full behavior and available capacity of the structure.
Rather than accepting the initial rating at face value, I performed advanced analysis consistent with the provisions of the design code. This let me more accurately evaluate the member's behavior and identify additional, defensible capacity. The result was improved load ratings for the bridges and posting was avoided.
Beyond the technical solution, I found this work particularly rewarding because it demonstrated the value of understanding the underlying structural behavior and knowing when a more refined analysis is warranted. It ultimately provided the owner with a technically sound solution while avoiding the costs and operational impacts associated with posting a bridge.
Q. Where have the lessons from those projects gone beyond your own team?
Through webinars and workshops, for a start. Midas has given me the opportunity to present several of my projects that way, which has been a rewarding experience both professionally and personally. These opportunities have allowed me to share my experience and lessons learned with other engineers, while also connecting with colleagues in the industry and gaining insight into the innovative work being done by others.
Within my own work, I value teamwork, knowledge-sharing and the development of those around me. I take pride in mentoring junior engineers and sharing my experience. Throughout, I keep a strong focus on attention to detail, safety, technical quality and practical, constructible solutions. Those priorities come from what I believe the best engineering combines: sound technical analysis with practical judgment and collaboration. Underneath it all is a commitment to delivering work that serves the project and the client well.
Accepting the first rating would have been the easier path, and few would have questioned it. But Luis Vila questioned it, on behalf of a structure that could not make its own case. That is the kind of engineering we hope more engineers will read about and recognize as their own.