Sung Su Truss Bridge

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Published on January 1, 2008

Author: Flemel

Source: authorstream.com

Failure Investigation of the Sung-Su Bridges Chun K. Seong Saint Martin’s College:  Failure Investigation of the Sung-Su Bridges Chun K. Seong Saint Martin’s College Introduction Sung-Su Bridge Conclusion 1. Introduction:  1. Introduction Three Dimensions of Structural Art by Professor David P. Billington Scientific Dimension - efficiency Social Dimension - economy Symbolic Dimension - structure’s elegance & expressive power Scientific Dimension:  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 Social Dimension:  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 Symbolic Dimension:  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, 2. Case Study :  2. Case Study Sung-Su Bridge, Seoul, Korea Welded and bolted steel truss bridge Constructed in 1979, failed in 1994 Reconstructed in 1997 Case Study - Sung-su Bridge:  Case Study - Sung-su Bridge Bridge Plan and Elevation:  Bridge Plan and Elevation Suspended Truss at Arch Shaped Steel Truss Bridge:  Suspended Truss at Arch Shaped Steel Truss Bridge Remaining Portion of Arch Shaped Steel Truss Bridge:  Remaining Portion of Arch Shaped Steel Truss Bridge Close-up view of a Hinge Connection at Truss Top Chord :  Close-up view of a Hinge Connection at Truss Top Chord Close-up view of a Hinge Connection at Truss Top Chord :  Close-up view of a Hinge Connection at Truss Top Chord Fractured Shape of the middle Vertical Hanger:  Fractured Shape of the middle Vertical Hanger Photo Taken at site Diagram of fracture surface Paints at weld Fractured Flange of the West Vertical Hanger:  Fractured Flange of the West Vertical Hanger Reconstruction of the Bridge:  Reconstruction of the Bridge Result of the Investigation:  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 3. Conclusion:  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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