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http://dx.doi.org/10.12989/was.2020.31.5.459

Numerical analysis of a long-span bridge response to tornado-like winds  

Hao, Jianming (School of Highway, Chang'an University)
Wu, Teng (Department of Civil, Structural and Environmental Engineering, University at Buffalo)
Publication Information
Wind and Structures / v.31, no.5, 2020 , pp. 459-472 More about this Journal
Abstract
This study focused on the non-synoptic, tornado-like wind-induced effects on flexible horizontal structures that are extremely sensitive to winds. More specifically, the nonuniform, intensive vertical wind-velocity and transient natures of tornado events and their effects on the global behavior of a long-span bridge were investigated. In addition to the static part in the modeling of tornado-like wind-induced loads, the motion-induced effects were modeled using the semi-empirical model with a two-dimensional (2-D) indicial response function. Both nonlinear wind-induced static analysis and linear aeroelastic analysis in the time domain were conducted based on a 3-D finite-element model to investigate the bridge performance under the most unfavorable tornado pattern considering wind-structure interactions. The results from the present study highlighted the important effects due to abovementioned tornado natures (i.e., nonuniform, intensive vertical wind-velocity and transient features) on the long-span bridge, and hence may facilitate more appropriate wind design of flexible horizontal structures in the tornado-prone areas.
Keywords
tornado-like winds; long-span bridge; wind-induced static loads; motion-induced loads; two-dimensional indicial response function; aeroelastic analysis;
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Times Cited By KSCI : 3  (Citation Analysis)
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