JOSEPH W. WILCHER III

STRUCTURAL OPTION

UNION STATION EXPANSION

WASHINGTON DC

Technical Assignments

Technical Assignment I

For the first technical assignment, a report anaylzing the exisitng conditions was created. The exsiting strucutral systems, codes and standards applied to the building, and load values for the design are within the report, Basic wind and seismic loads were calculated as well as spot checks on various strucutal elements.

To download a complete version of Technical Report I, click here (PDF Version).

Technical Assignment II

For the second technical assignment, a report studying the use of alternative floor systems for Union Station was created. The following systems were anaylzed in the report:

• Two-Way Post Tension (Exisitng)
• Double Tee Floor System
• Composite Steel
• Flat Plate w/ Drop Panels

For this report, a diffrent appraoch was taken and it was determined the double tee floor system would be benefical for the lower floors and the composite steel would work on the upper floors. Both of the floor systems would require a transfer level and a new lateral system would have to be designed. A more detailed analysis would be required for further investigation regarding the two floor systems.

To download a complete version of Technical Report II, click here (PDF Version).

Technical Assignment III

For the third technical assignment, report anaylzing the exisitng lateral system for Union Station was done. Ordinary concrete moment frames act as the lateral system for each floor in both the north-south and east-west direction. The report takes an in-epth look at the seismic and wind lforces acting on Union Station by using using computer programs SAP and STADD and by means of hand calculations as well.

The results verify that the wind forces control the lateral design throughout Union Station. Majority of the momet frames pass the criteria for wind and seismic drift. However, Frames 5 through 7 did not pass either criteria. This is due to several reason sated by the author throughout the report.

To downlaod a complete version of Technical Report III, click here (PDF Version).

User Note:

"While great efforts have been taken to provide accurate and complete information on the pages of CPEP, please be aware that the information contained herewith is considered a work-in-progress for this thesis project. Modifications and changes related to the original building designs and construction methodologies for this senior thesis project are solely the interpretation of Joseph W. Wilcher III. Changes and discrepancies in no way imply that the original design contained errors or was flawed. Differing assumptions, code references, and methodologies have been incorporated into this thesis project; therefore, investigation results may vary from the original design."