中文摘要：

为研究主跨1 400m斜拉桥在80m·s-1检验风速下的抗风性能,在风洞中进行了法向风和斜风下的节段模型试验,确定了气动控制措施与改良后主梁断面,并进行了全桥气弹模型试验,验证了控制措施的有效性,获取了全桥风致振动响应数据。研究结果表明：采取适当的颤振控制措施,在抗风稳定性方面,该1 400m跨径斜拉桥方案具有可行性;随跨度增大,静力与颤振失稳竞争更为激烈;斜风效应对静力、颤振失稳临界风速及涡振振幅均有影响;静力稳定性重新成为超千米级斜拉桥抗风性能的控制因素。

英文摘要：

To study the wind-resistant performance of a cable stayed bridge with a main span of 1 400 m, section model tests were carried out in wind tunnels under normal wind and skew wind to determine flutter control measures and modified bridge section. In order to check the effectiveness of flutter control measures and achieve the wind induced vibration data of full bridge, full aeroelastic model test was carried out. The results show that through appropriate arrangement of flutter control measures, for the aspect of wind-resistant stability design, this 1 400 m cable stayed bridge scheme is feasible. With the extending of bridge span, the competition between static and flutter instability is becoming more and more fierce. Yaw wind effect has influence on the critical wind speed of static and flutter instability, and even on the amplitude of vortex-induced vibration. The static stability of super-kilometer cable stayed bridge turns into the controlling factor of wind-resistant stability again.