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Full-Text Articles in Engineering
Safety Assessment Of Road Vehicle In Crosswind Considering Driver Behavior, Jiexuan Hu
Safety Assessment Of Road Vehicle In Crosswind Considering Driver Behavior, Jiexuan Hu
LSU Doctoral Dissertations
With expansion of the economy, more and more highway networks extend to coastal areas and mountain valley areas. Vehicles will be exposed to strong crosswinds when driven on these highway roads, especially in hurricane season and in winter in these two different topographic areas. Strong crosswinds threaten the safety of transportation infrastructure and passing vehicles in forms of vehicle accidents that usually result in traffic blockage and driver injury, posing negative effects on economic growth. This dissertation aimed to evaluate the vehicle safety when running through crosswinds in consideration of driver behaviors.
Firstly, the aerodynamic characteristics of road vehicles were …
Performance Study Of Link Slab Continuity In Prestressed Concrete Bridges, Marco Tulio Canales Jr
Performance Study Of Link Slab Continuity In Prestressed Concrete Bridges, Marco Tulio Canales Jr
LSU Doctoral Dissertations
Link slabs in bridges can be a cost-effective solution to increase the service life of bridge structures. The partial continuity condition in link slab bridges, however can be challenging to quantify. In this work link slab performance is studied by means of a parametric study, a long-term Structural Health Monitoring (SHM) System, and a detailed finite-element model.
The parametric study was conducted using mathematical and a two-dimensional (2D) finite element model. The study considers bridge design factors such as number of spans, span length, span length ratio, girder separation, and temperature settings, in conjunction with the corresponding girder and support …
Aerodynamic Flutter And Buffeting Of Long-Span Bridges Under Wind Load, Shuqian Liu
Aerodynamic Flutter And Buffeting Of Long-Span Bridges Under Wind Load, Shuqian Liu
LSU Doctoral Dissertations
With the continuous increase of span lengths, the aerodynamic characteristics of long-span bridges under external wind excitation have become much more complex and wind-induced vibration has always been a problem of great concern. The present research targets on the aerodynamic performance of long-span bridges under wind load with an emphasis on bridge flutter and buffeting.
For the aerodynamic flutter analysis of long-span bridges, the present research investigated the effects of the wind turbulence on flutter stability. The characterizations of the self-excited forces are presented in both the frequency-domain and in the time-domain, and the flutter analysis is conducted under both …