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天窗是单层厂房屋盖构件的主要组成部分,量大面广,我国单层厂房自50年代至今一直延用Π形钢筋混凝土天窗或Π形钢天窗。众所周知,Π形天窗存在着体积大、自重重、材料费以及厂房使用期间能源消耗大等缺点。同时在地震作用下易倒塌。新修订的建筑抗震设计规范明确指出:“突出屋面的天窗宜采用钢天窗架”,并对天窗两侧竖向支撑的布置要求作了规定。如8度地震设防区要求竖向支撑中距≤24m,9度区≤18m。则竖向支撑
The sunroof is the main component of the single-storey factory building cover components. It has a wide range of products. China’s single-storey factory buildings have been extended with concrete-shaped reinforced concrete sunroofs or dome-shaped steel sunroofs since the 1950s. As we all know, the dome-shaped skylight has the disadvantages of large volume, self-heavy, material costs, and large energy consumption during the use of the plant. At the same time, it is easy to collapse under the action of earthquakes. The newly revised code for seismic design of buildings clearly states: “The sunroof that protrudes from the roof should adopt a steel skylight frame” and regulates the layout requirements for the vertical support on both sides of the sunroof. For example, a 8 degree earthquake fortification area requires a vertical support of ≤ 24m, and a 9 degree zone of ≤ 18m. Vertical support