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Failure Investigation Of The Steel Strut Of Paseo Suspension Bridge, Genda Chen, Chris Courtright, Lokeswarappa R. Dharani, B. Xu
Failure Investigation Of The Steel Strut Of Paseo Suspension Bridge, Genda Chen, Chris Courtright, Lokeswarappa R. Dharani, B. Xu
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
A vertical strut of the 1232-foot long, self-anchored Paseo Suspension Bridge fractured when the temperature hit at a record low of 9°F below zero. During inspection the following day, it was found that its lower pin was frozen and did not allow for free movement of the superstructure. The objective of this study is to pinpoint one of the four reasons for this incidence or their combination: overstressing, thermal contraction, fatigue, and reduction in fracture toughness at low temperatures. To achieve this objective, material property and fatigue testing was performed on samples of strut material while the bridge and strut …
Behavior And Fatigue Properties Of Metallic Dampers For Seismic Retrofit Of Highway Bridges, Genda Chen, Stephen Eads
Behavior And Fatigue Properties Of Metallic Dampers For Seismic Retrofit Of Highway Bridges, Genda Chen, Stephen Eads
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
The objective of this study is to develop an economical solution with metallic dampers for the seismic retrofit of highway bridges in low occurrence seismic zones, such as in the Central and Eastern United States. Select low carbon steel rods were first tested for their ductile behavior and material strength. Large-scale, tapered rods were then tested for their energy dissipation capability and fatigue strength under regular, irregular, and earthquake loads. A full-scale damper made of five tapered rods was designed next for the seismic retrofit of a three-span continuous steel-girder bridge in southeast Missouri; its system performance including joints and …