Abstract:Aiming at the typical suspension bridges in China, the wind tunnel tests on segmental models and full-bridge models are conducted, and combined with the field measurement data of buffeting response under typhoon and winter strong wind conditions, the wind tunnel test and measured results are compared and analyzed. The research result shows that the buffeting tests of segmental and full-bridge models are consistent with the measured values in specific flow fields, and extending the sampling time can improve the stability of the results. The bridge displacement response increases nonlinearly with the increase of wind speed. Under the same wind speed, the root mean square (RMS) value of displacement under oblique wind (5° angle of attack) is larger than that under vertical inflow, indicating that oblique wind is more likely to induce large responses. The displacement response first decreases and then increases with the increase of turbulence integral scale. The rationality and accuracy of the wind tunnel test design are verified, which provides a scientific basis for the optimization of wind tunnel test schemes and setting of sampling parameters of similar bridges, clarifies the influence laws of key wind field parameters such as oblique wind and turbulence integral scale on buffeting response, and provides reliable support for the refined optimization of anti-wind design and the formulation of vibration control measures for suspension bridges.
