柳东新区文化广场结构设计难点分析

Analysis on structural design difficulties of Liudong New District Culture Square

柳东新区文化广场地上结构分为A区(A1科技馆、A2青少年宫)、B区(B1群艺馆、B2文化配套中心)、C区(拱廊)。地下设有两层连通的人防地下室。A区、B区上部结构从下至上逐层倒悬外挑、平面尺寸逐层扩大。外围结合建筑要求设置斜柱支撑外圈结构,利用钢梁将斜柱水平分力传递至内侧结构。柱底采用一种浅埋式钢管混凝土柱柱脚构造,倒悬外挑部分采用钢梁+钢筋桁架楼承板以避免高支模施工。介绍了基础和主体结构的设计思路,对A、B区倒悬外挑结构和C区拱廊桁架的受力进行了分析,分析结果表明,结构设计合理。

The above ground structure of Liudong New District Culture Square is divided into zone A(Science and Technology Museum A1,Youth Palace A2),zone B(Mass Arts Museum B1,cultural supporting center B2),and zone C(arcade).There are two connected basements with civil air defense function in the underground.The upper structures of zone A and zone B are overhanging from bottom to top,expanding floor by floor.The external ring structure of the building is supported by inclined columns according to architecture design requirements,and steel beam is used to transfer the horizontal force of the inclined column to the inner structure.The bottom of the columns adopts a shallow buried concretefilled steel tube column base structure,and the inverted overhanging part adopts steel beams+steel truss floor bearing plates to avoid high formwork construction.The design ideas of the foundation and main structure were introduced,and the forces acting on the inverted overhanging structure in zone A and B,as well as the arch truss in zone C,were analyzed.The analysis results show that the structural design is reasonable.