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随着建筑技术的发展,人们在地球上建起的大楼越来越高。你可知道这些直插云霄的超高层建筑物是如何在风中“矗立”的吗?现在我们来做一个简单的实验:给你一段1厘米的钢筋,请把它折弯。你用尽了全身的力气,也不可能把这段短短的钢筋折弯。好,现在给你一段20厘米的钢筋,请你把它折弯。你同样是用尽了全身的力气,但钢筋看来只是稍稍有点儿变化,完全把它折弯也是不可能的。继续加长钢筋,现在给你一段1米长的钢筋,用
With the development of building technology, the building built on the earth is getting higher and higher. Do you know how these high-rise skyscrapers are standing in the wind? Now let’s do a simple experiment: give you a piece of 1-centimeter steel and bend it. You exhausted the body’s strength, it is impossible to bend this short reinforcement. Okay, now give you a 20cm rebar, please bend it. You are also exhausted body strength, but the reinforcement seems to be a little bit of change, it is impossible to completely bend it. Continue to extend the bar, now give you a 1-meter-long steel, with