A time domain approach for predicting the coupled flutter and buffeting response of long span bridges is presented. The frequency dependent unsteady aerodynamic forces are represented by the convolution integrals involving the aerodynamic impulse function and structural motions or wind fluctuations. The aerodynamic impulse functions are derived from experimentally measured flutter derivatives, ...

ABSTRACT: In this paper, a framework for studying the dynamics of systems with frequency dependent parameters, under stochastic loads, using the state-space modeling approach is presented. Particular emphasis is placed on the stochastic buffeting response of long span bridges under multicorrelated wind excitation. The buffeting response is expressed as the output of an integrated system driven ...

A systematic approach was proposed to assess vehicle accident risk over sea-crossing bridges under strong winds. The annual frequency of an evaluated as a index using the information on daily traffic volumes, ratio high-sided vehicles, and long-term distribution speed direction wind at bridge site. considered effect that deck shapes road alignments exert stability. estimated by accounting for e...

Abstract The long-span bridge is highly sensitive to wind loads, and their random vibration response under static deformation fluctuating load are relatively complex. analysis of jitter has become a key issue in the design. Taking Hanjiatuo Yangtze River Bridge chongqing-lichuan railway as engineering background, influence different aerodynamic admittance functions on main girder studied throug...

The damage caused by earthquake is irresistible for human beings, and the structure with poor robustness is most affected by earthquake. Especially when traffic arteries like bridges and highways are affected, the losses will be unimaginable. To reduce the loss in earthquake, the paper targets the long-span cable-stayed bridge and discusses a method of structural damage control. The energy-diss...

It has been suggested that population growth dynamics may be revealed by the geographic distribution and the physical structure of ancient bridges. Yet, this relationship has not been empirically verified. In this study, we applied the archaeological records for ancient bridges to reveal the population growth dynamics in the lower Yangtze River Basin in late imperial China. We investigated 89 a...