J. Michael Garver

“Metropolitan Atlanta Rapid Transit Authority
Lindbergh Center Station
Case Study of the South Concourse Modifications to Add New East Platform”

J. Michael Garver, P. E.

Parsons Brinckerhoff Tudor – Turner Associates

Atlanta, GA

Abstract

Overall Project Description:
Lindbergh Center Station is an existing below-grade open rapid-rail MARTA transit station. The structural scope of work included modification and expansion of the station to accommodate a mixed-use commercial development over and around the station. This type of development is known as Transit Oriented Development (TOD). The structural aspects of the project included the addition of Main Street Bridge, North Plaza, expanded Concourses, expanded roof areas, additional vertical circulation, new East Side Platform and pedestrian bridges. All of these span over or are directly adjacent to an active rapid rail-line. All construction over or adjacent to the rail had to be done in a single-tracking or non-revenue mode between 9:00 pm and 4:00 am.

Presentation Focus:
This presentation will focus on the analysis and design to increased the span of the existing cast-in-place concrete south concourse an additional 12 feet over the new east platform. The presentation will include discussions on how the following aspects of the analysis and design were achieved using a GT STRUDL features where used to:

Establish the residual capacity of the existing structure using the concrete and steel design feature.
Incorporate staged construction and changing support conditions.
Quickly research of various support scenarios to accommodate alternate design solutions in order to deliver a cost-effective solution to the contractor.
Maintain flexibility in a design build environment to investigate alternate construction sequences to accommodate contractor’s request due to limitations in the construction access resulting in savings to the owner.
Design for thermal, earth pressure, gravity and dynamic loads to minimize capital cost.

Biographical Data

Mr. Garver is a Supervising Structural Engineer as well as a Project Manager for Parsons Brinckerhoff Tudor-Turner Associates were he is a senior-level structural engineer with twenty-two years of experience in the design, management, and construction coordination of diverse architectural, industrial and transportation projects.

Education

BS Civil Engineering, University of Tennessee, Knoxville, 1980

To view the entire presentation on-line select the following PowerPoint Presentation file:

Garver 2002.ppt
Date: 6/20/2002
Size: 27,327 KB