Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Wind and Structures Volume 31, Number 5, November 2020 , pages 459-472 DOI: https://doi.org/10.12989/was.2020.31.5.459 |
|
|
|
Numerical analysis of a long-span bridge response to tornado-like winds |
||
Jianming Hao and Teng Wu
|
||
| 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. | ||
| Key Words | ||
| tornado-like winds; long-span bridge; wind-induced static loads; motion-induced loads; two-dimensional indicial response function; aeroelastic analysis | ||
| Address | ||
| Jianming Hao:School of Highway, Chang'an University, Xi'an, Shaanxi, 710064, China/ Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY, 14260, U.S.A. Teng Wu:Department of Civil, Structural and Environmental Engineering, University at Buffalo, Buffalo, NY, 14260, U.S.A. | ||