美国芝加哥西尔斯大厦于1970年动工,1974年正式建成,它的总建筑面积为41万平方米,总高度442米,达到了芝加哥航空事业局规定房屋高度的极限。建筑内有电梯102部,全部建筑用钢7.6万吨,混凝土5.57万立方米。西尔斯大厦在结构上采取了抗风措施,但仍不能完全克服风力的影响,在高空气流和风力的作用下,建筑会产生位移,有时可达460毫米,人在 The Sears Tower in Chicago began construction in 1970 and was completed in 1974. It has a total construction area of ​​410,000 square meters and a total height of 442 meters, which meets the limits set by the Chicago Airlines Bureau of Housing. There are 102 elevators in the building, including 76,000 tons of steel for construction and 55,700 cubic meters of concrete. Sears Tower has adopted wind resistance measures in its structure, but it still cannot completely overcome the impact of wind. Under the influence of high air flow and wind force, the building will produce displacements, sometimes up to 460 mm, and people