在某些公共建筑设计中,经常会遇到上部房间为小开间,而下部则为大开间,或在中间某层设置舞厅、会议室等大房间的问题。我们在本溪市彩屯农贸市场2号楼的设计中就遇到了这样的问题。由于受道路的限制,底层需要一个15.6m的大开间,而上部则为标准的办公及客房,其开间为3.3m和4.5m,进深4.5m。 通常的结构方案是用一根大托梁来承担上部的全部荷重,而且这根大梁要做得很大,一方面要耗费大量的建筑材料,另一方面上部房间的保温处理和使用(采光)都受到一定的影响。为此,在该项 In some public building designs, it is often the case that the upper room is a small room, while the lower room is a large room, or a large room such as a ballroom, a conference room, or the like is installed in a certain middle floor. We encountered such problems in the design of Building 2 of Caitun Agricultural Trade Market in Benxi City. Due to road restrictions, the ground floor requires a large bay of 15.6m, while the upper section is a standard office and guestroom with an opening of 3.3m and 4.5m and a depth of 4.5m. The usual structural solution is to use a large joist to bear the full load of the upper part, and this girder has to be very large. On the one hand, it consumes a lot of building materials, on the other hand, the insulation treatment and use of the upper room (lighting) Both have been affected. For this reason, the item