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failure investigation of the sung-su bridges chun k. seong saint martin s college

1. Introduction. Three Dimensions of Structural Art by Professor David P. BillingtonScientific Dimension - efficiencySocial Dimension - economySymbolic Dimension - structure's elegance

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failure investigation of the sung-su bridges chun k. seong saint martin s college

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    1. Failure Investigation of the Sung-Su Bridges Introduction Sung-Su Bridge Conclusion

    3. Scientific Dimension Honesty to State-of-the-art to local engineering and technology Adhering to the rules of Design Process Training and skills of the Construction Personnel Diligent maintenance and inspection

    4. Social Dimension Political Pressure by over-achieving officials Economic Pressure due to short and long-range economic development plan Local’s ego to have the first kind, the tallest, the longest or the largest structure Forced to conform to the land use plan

    5. Symbolic Dimension Bridge as a public fixture for everyone Bridge as the identity of a locality Crossing a large body of water-source of relaxation, recreation, and a peaceful background,

    6. 2. Case Study Sung-Su Bridge, Seoul, Korea Welded and bolted steel truss bridge Constructed in 1979, failed in 1994 Reconstructed in 1997

    7. Case Study - Sung-su Bridge

    8. Bridge Plan and Elevation

    9. Suspended Truss at Arch Shaped Steel Truss Bridge

    10. Remaining Portion of Arch Shaped Steel Truss Bridge

    11. Close-up view of a Hinge Connection at Truss Top Chord

    12. Close-up view of a Hinge Connection at Truss Top Chord

    13. Fractured Shape of the middle Vertical Hanger Photo Taken at site Diagram of fracture surface

    14. Fractured Flange of the West Vertical Hanger

    15. Reconstruction of the Bridge

    16. Result of the Investigation Political Pressure – military rules Socio-Economic Pressure - rapid growth Conceptual Design of the Bridge Engineering - no concept of FCM Construction - no shop drawing Maintenance - by visual inspection, no access to the failed detail

    17. 3. Conclusion Bridge structure is a symbolic fixture Forming an Identity of a community Technically proven efficient design, adequately developed and funded construction - elegant structure Independent cross-checking of the design Importance of Maintenance and Inspection

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