论文部分内容阅读
1950年以前,只有少数的砼建筑物是高于20层的。那时的结构有沉重的围护外墙和砖石隔墙,这实质上给建筑物提供了强度和刚度。由于砼和钢材所用的应力级别较低,故建筑物的骨架构件尺寸很大,因此刚度也很大。收缩、徐变和温度对框架变形造成的影响是次要的,又因为一般结构的超载潜力很大,所以这种影响也是可以忽略的。虽然框架设计时要考虑抵抗
Before 1950, only a handful of buildings were more than 20 stories tall. The structure at that time had a heavy enclosure wall and a masonry partition wall, which essentially provided the building with strength and rigidity. Because of the low stress levels used for concrete and steel, the building’s skeleton components are very large in size and, therefore, very rigid. The effects of shrinkage, creep and temperature on the deformation of the frame are secondary, and because the overload potential of the general structure is large, this effect is also negligible. Although the frame design must consider resistance