一、概述上海色织四厂75英寸布机车间,采用了大跨度部分预应力混凝土多层框架结构。车间高六层,平面尺寸为40×36m,西侧为高十二层、宽5m的辅助用房,东端有十二层办公用房(图1)。车间的柱网要求能便于按工艺灵活布置,以提高生产工效。按一般柱网布置,每层布置布机仅100台,若改用大柱网,则可布置112台,最后选定(20m+20m)×7.2m方案。由于本工程位于市中心,场地 I. Overview of the 75-inch cloth machine shop of Shanghai Sezhi No. 4 Factory, using a large-span partially prestressed concrete multi-layer frame structure. The workshop is six-storey high, with a plan size of 40 x 36m. It is an auxiliary room with 12 floors high and 5m wide on the west side and 12 floors of office space on the east side (Figure 1). The column net requirements of the workshop can be easily arranged flexibly according to the process to improve the production efficiency. According to the general column net arrangement, only 100 sets of cloths are arranged in each layer. If a large column net is used, 112 sets can be arranged, and finally the (20m+20m)×7.2m solution is selected. Since the project is located in the city center, the venue