对“风吹草动”这一自然现象 ,人们早已司空见惯。但有人说“风吹桥动” ,你也许会产生疑问 :偌大的一座桥梁怎么会随风而动呢 ?事实上 ,桥梁的结构不同 ,风对其影响的程度也是不一样的。如对小跨、低矮、质重的刚性桥梁来说 ,任凭风吹 ,其巍然不动 ;但对大跨、高塔、质轻的柔 People have long been accustomed to the natural phenomenon of “troubled weather”. However, some people say that “the wind and the wind bridge move” and you may have questions: How can a huge bridge move with the wind? In fact, the structure of the bridge is different and the impact of the wind is not the same. Such as small span, low, high quality rigid bridge, despite the wind, its unshakeable; but for large span, tower, light soft