"转自："

1、结构刚度与质量问题钢结构一大优势是高强轻质，这在常规建筑上是优点。

1. The steel structure with structural rigidity and quality problem is of high strength and light quality, which is an advantage in conventional architecture. 

但是在某些结构上，这可能会成为缺点。钢的密度比混凝土大，但为什么说钢材是轻质呢，是因为钢材的强度高，承受相同荷载情况下，钢材需要量少，总体来说质量会比混凝土轻。这是钢结构的一大优点。同时由于钢结构用量少，会导致刚度不足的问题。同时在动力问题中，质量小，也未必就是一个好事情。高层超高层抗风抗震是个大问题，这里说的抗风抗震不是强度问题，而是刚度问题。也就说，大风地震情况下，不怕楼会倒，而是怕晃动太大，确切地说是怕晃动的加速度太大。

But in some structures, this can be a weakness. Steel than the density of concrete, steel is light but why say, because of high strength steel, under the same load conditions, steel demand is little, overall quality will be lighter than concrete. This is a great advantage of steel structure. Meanwhile, due to the lack of steel structure, the problem of insufficient rigidity can be caused. And it's not necessarily a good thing to have a low quality in power problems. The high – rise high – rise anti – wind shock is a big problem, the anti – wind shock resistance is not the strength problem, but the rigidity problem. In the case of strong wind, it is not afraid that the buildings will fall, but the shaking is too big, or rather the acceleration of the shaking is too big. 

想象一下，一个一直在晃动的大楼，你敢去住不？一个没有正常使用功能的建筑，无疑就是个定时炸弹。这时候强度优势很难发挥出来，刚度问题虽然可以通过结构手段处理，但是质量太轻，可能会是个致命问题。在大跨度桥梁中，尤其是悬索桥，由于钢结构质量太轻，我们甚至要往钢箱里面添加配重，改善其动力特性。对应的房屋结构中要采用钢结构与混凝土核心筒配合，来解决刚度问题。

Imagine a building that has been shaking all the time. Do you dare to live? A building that doesn't function properly is a ticking time bomb. It is difficult to exert the strength advantage at this time. Although the stiffness problem can be dealt with by means of structure, the quality is too light, which can be a fatal problem. In the large span bridge, especially the suspension bridge, because the steel structure is too light, we even add the weight to the steel box to improve its dynamic characteristics. In the corresponding housing structure, steel structure and concrete core barrel are used to solve the stiffness problem. 

帝国大厦，双塔，西尔斯大厦确实是钢结构的超高层，但他们都是奔着世界纪录去的，他们解决的关键问题都是钢结构高层抗风，还有他们太贵了，如果用来做住宅。

The Empire State Building, the twin towers, the sears tower is indeed a high-rise steel structure, but they are for a world record, they solve the key problems are high-level steel structure wind resistance, and they are too expensive, if used for housing. 

另外，动力问题要注意的是，动力问题很复杂，刚度低未必合适，刚度高也未必好，只有合适的范围才是合理的。

In addition, the dynamic problem should be noted that the dynamic problem is complex, the rigidity is not necessarily appropriate, the rigidity is not good, only the appropriate range is reasonable. 

来源：网络，如有侵权，请与我们联系删除。