主楼内外高差过大或开设大洞口地下室顶板作为嵌固端的探讨

Discussion on the Basement Roof as the Fixed End under Conditions of Over-large Elevation Difference between Internal and External Parts of Main Buildings or Big Openings

通过工程实例对地下室顶板主楼内外高差过大或开设大洞口两种情况进行分析和讨论,在其他条件都满足的前提下,确定上述两类地下室顶板作为上部结构嵌固端在受力和构造上的要求,以保证地下室顶板能够有效、可靠传递上部结构在水平地震作用下的基底剪力。

Two different cases were studied for the basement roof based on real projects.In one case,the elevation difference between internal and external parts of main buildings in the basement roof was over-large.In the other case,there were big openings in the basement roof.With considerations of all other conditions,the requirements of stress and details of the basement roof as fixed end of superstructure were analyzed.The study makes sure that,these types of basement roof can effectively and robustly support the base shear under horizontal earthquakes.