南京青奥跨江景观桥主塔钢混结合段设计

Design of Joint Section of Hybrid Tower of Nanjing Youth Olympic Landscape River Bridge

南京青奥跨江景观桥为主跨270 m倾斜双塔空间索面钢箱梁斜拉桥,桥塔采用上部钢塔柱、下部混凝土塔柱组合成的椭圆形混合塔,上下塔柱采用设置焊钉及开孔板连接件的有格室后承压板式结合段连接。为确保结合段设计合理,考虑钢-混凝土相对滑移和接触,文章建立全塔实体-板壳空间有限元模型,计算分析塔柱应力、连接件受力等,可为类似工程提供借鉴。

Nanjing Youth Olympic landscape river bridge was a steel box girder cable-stayed bridge with the spatial cable plane and twin towers, and the main span was 270 meters. The bridge＇s tower was oval shape, divided into two parts, the upper part using steel tower and the lower part using concrete tower. The upper and lower part of tower combine with the junction set welding studs and PBL connections with geocells and pressure plate. In order to ensure the rational design of joint section, considering steel-concrete relative slip and contacts, this paper established full tower plate-shell dimensional finite element model and calculated and analyzed the stress of tower and the force of connector.