Tuesday, October 5, 12, 19, 26, 2021
Zoom Webinar
11:30 AM-1:30 PM
The ASCE Structural Engineering Institute Boston Chapter is pleased to present the 25th Fall Lecture Series entitled Rehabilitation and Repair of Structures. The seven lectures that comprise this series will occur virtually during four sessions, which are held on consecutive Tuesdays. Topics include:
The Lecture Series featured sessions are as follows:
Lecture 1 – UHPC for Bridge Rehabilitation
Zach Haber, PhD, FHWA
Keeping bridges in a state of good repair is essential to keeping the transportation system operating efficiently. Agencies at all levels can deploy ultra-high performance concrete (UHPC) for bridge preservation and repair (P&R) to maintain or improve bridge conditions cost effectively. UHPC, a fiber-reinforced, cementitious composite material with mechanical and durability properties that exceed those of conventional concrete materials, can be an optimum solution for bridge infrastructure (P&R). Promising applications include bridge deck overlays, girder end repairs, expansion joint repairs, repair of prefabricated bridge element (PBE) connections, and column or pile jacketing. UHPC offers enhanced durability performance and improved lifecycle costs over traditional methods. Participants will receive a brief introduction to UHPC-class materials, an overview of promising applications and the U.S. deployment status and learn about recent projects that have used this technology. Lastly, participants will also learn how current Federal Highway Administration (FHWA) efforts are promoting the use of this innovative technology.
Session 2–October 12, 2021
Lecture 2 – Non-Destructive Testing: Understanding Benefits and Limitations
Matthew Sherman, PE, Senior Principal, Simpson Gumpertz & Heger
Non-destructive testing (NDT) is an essential tool used by civil engineers to quickly evaluate existing conditions and investigate potential failures without causing damage to a structure. Ranging from simple hammer-sounding to highly complex stress wave analysis, these techniques help civil engineers focus their efforts and save project time by determining the areas of most need. Rapid improvements in technology have made NDT techniques more accessible for practitioners, increasing their availability and reliability, but it is important to know the limitations of each test and understand how to interpret the results. In this session, we will explore the types of available NDT techniques and discuss how to correctly implement and interpret the most common techniques.
By participating in this session you will learn:
Lecture 3 – Emergency Response and Repair to Bridges Following Vehicle Impact
Frank A. Artmont, PE, PhD, Structural Engineer, Modjeski and Masters, Inc.
This presentation will provide an overview of the design stage work associated with steel bridges which have been subjected to high-speed vehicle impacts. Typically, these stages include the initial response to the accident, analysis of the structure in the damaged state, and development of an action plan for returning the structure to a serviceable condition. These stages will be described in a practical way using a case study.
The case study involved an over-height vehicle which struck and damaged a portion of a through-truss bridge carrying State Route 6 over French Creek in northwestern Pennsylvania in January 2019. The vehicle impacted and severed the bottom chord of the end portal frame and damaged the bottom chords of the next two interior sway frames of the seven panel Pratt truss span. The main truss verticals were dragged inwards and along the direction of motion as a result of their connections with the interior sway frames, severely damaging these critical members and jeopardizing the ability of the structure to carry loads. The structure was immediately closed to all traffic. The project ultimately required an assessment of the capacity of the structure in its damaged state, a determination of whether the bridge could be reopened at a reduced posting, and the development of repair plans for the structure.
Learning Objectives:
Session 3 – October 19, 2021
Lecture 4 – Historic Bridge Structure Rehabilitation – Lechmere Viaduct Boston/Cambridge, MA
Katie Mancinelli, PE, Senior Structural Engineer, VHB
Stephen Jahnes, PE, Project Manager, VHB
This session describes considerations for repair and rehabilitation of historic bridge structures.
The discussion will include an overview of the process to follow when a bridge structure has been identified as eligible or listed in the National Register of Historic Places. Also discussed will be challenges with designing and detailing for a piece of legacy infrastructure, and the challenges associated with utilizing new materials and technologies to increase the load carrying capacity, marrying new and historic design details, and planning for the unknown. The presentation will highlight the Lechmere Viaduct project as a specific case study to show how these considerations can be applied.
Learning Objectives:
Lecture 5 – Revitalizing Urban Waterfronts
Erika Rosenstein, PE, Group Leader Ports and Maritime, Jacobs
Many major coastal cities originated as hubs for maritime industry and trade. Throughout the 20th century urban centers utilized their waterfront primarily as working seaports. However, with the advent of centralized container terminals, many of these facilities became obsolete and were abandoned as operating ports. A significant number of cities struggled to repurpose their waterfronts initially and much of the associated infrastructure has fallen into various states of disrepair. Increasingly,
there is a call to revitalize these underutilized waterfront sites with future-focused adaptive reuse and improved public access.
Undertaking rehabilitation work along the waterfront is challenging due to the harsh and dynamic marine environment, the complexity of underwater repair work, and limited site access. All these factors make rehabilitation and continued maintenance of waterfront infrastructure far more difficult and costly than typical inland facilities. However, through holistic planning and a judicious repair approach, these transformations are achievable, and can create incredible new assets for our urban centers. There are several examples of the successful conversion of former industrial shipping sites into mixed-use hubs and public waterfront parks throughout the country.
Learning Objective:
This presentation will focus on the history of urban waterfronts, challenges of the rehabilitation work, the importance of lifecycle modelling for continued maritime maintenance, and the growing importance of embedding adaptive resiliency into designs.
Session 4 – October 26, 2021
Lecture 6 – Design for Sea Level Rise
Richard Houghton, ASLA, Principal Landscape Architect, Tighe & Bond
Eric Ohanian, PE, Project Manager, Tighe & Bond
Andrew Stebbins, LEED AP, Senior Project Manager, The Architectural Team (TAT)
This session describes approaches for addressing potential future sea level rise in coastal building projects and bridges. The discussion includes review of some current guidelines and approaches for estimating projected sea level rise and wave impacts. The presentation will highlight some recent building and bridge projects that demonstrate different approaches that landscape architecture, architecture, engineered systems, seawall design, and overall infrastructure design can work to protect and enhance communities with solutions that serve multiple purposes.
Learning Objectives
Lecture 7 – Strengthening of Concrete and Masonry Structures with Externally-Bonded Systems
Gustavo Tumialan, PhD, PE, Senior Project Manager, Simpson Gumpertz & Heger
Repair and rehabilitation projects often include structural strengthening to increase or restore the load-carrying capacity of elements subjected to deterioration or damage, construction or design errors, increased service loads, and building code requirements. Externally-bonded fiber-reinforced polymer (FRP) and fiber-reinforced cementitious matrix (FRCM) composite systems are viable tools for structural repair, strengthening, and rehabilitation of existing concrete and masonry members. High tensile strength, light weight, resistance to corrosion, ease of installation, and limited disruption to building operations during installation make externally-bonded systems an attractive option.
FRP systems have been used for about two decades in the United States. FRCM systems is another strengthening tool, introduced to the US repair industry in recent years but with several years of experience in Europe. This presentation will primarily focus on FRP systems and will also provide an overview on FRCM systems.
Objectives:
Registration Deadline for Full Lecture Series: Friday, October 5, 2021
Registration fees for full series of four lectures: $150 BSCES Members, $120 Public Sector Members, $50 Senior (65+) and Student Members, $180 Non-Members, $150 Public Sector Non-Members
Registration fees for individual sessions: $50 BSCES Members, $40 Public Sector Members, $20 Student & Senior (65+) Members, $60 Non-Members, $50 Public Sector Non-Members
Information/Registration:
Register to participate in the full Lecture Series at a discounted rate or for the first session only and pay by credit card by clicking Registration above. Register for more than one session by downloading the registration form and following the submission instructions. To register online for an event at the BSCES member rate you must login using your BSCES assigned username and password. If you do not know your BSCES member login information call 617/227-5551 or email bsces@engineers.org. You can also register for this event by fax, mail, or email. To do so, download and complete a BSCES Event Registration Form and follow the submission instructions. Cancellations received after Friday, October 1, 2021 and no-shows will be billed.
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