摘要
波形钢腹板PC组合箱梁适用于不同结构形式的桥梁,相比普通混凝土箱梁具有显著的耐久性和经济性,波形钢腹板斜拉桥将波形钢腹板组合箱梁应用到斜拉桥中,充分发挥了2种结构的特点。南昌朝阳大桥主桥通航孔桥为(79+5×150+79)m波形钢腹板PC组合箱梁六塔连续单索面斜拉桥,上层布置双向8车道,下层布置人行和非机动车道。通过分析研究,该桥选择了较小的跨中比;由于塔数多,由中塔到边塔传递路径长,边跨设置辅助墩效应小,因此未设辅助墩。采用塔梁固结、梁墩分离的结构体系,箱梁宽43.84m,设置钢横隔板;斜拉索为单索面,扇形布置。桥塔外形呈"合"字形,桥塔处设置双支座。采用拉索减震支座作为上部结构的减隔震装置,布置在2个边塔下方。
The PC composite box girder with corrugated steel webs is applicable to bridges with a variety of structural types ,which exhibits superior durability and economic features as compared with the common concrete box girder .The cablestayed bridge with corrugated steel webs is regarded as the type of structure where composite box girder with corrugated steel webs is ingeniously used ,making better use of the properties of the two structures . The main navigational bridge of the Chaoyang Bridge in Nanchang is a （79＋ 5 × 150＋79） m continuous composite box girder cablestayed bridge with corrugated steel webs .The bridge has six pylons and the stay cables are arranged in single cable plane .In addition ,the bridge has two layers of decks ,on the upper deck ,dual eight vehicle lanes （four lanes each side） are arranged and pedestrian and nonmotorized vehicle lanes are arranged on the lower deck .Based on the analysis and study undertaken , small side spantomain span ratio was chosen .Due to the multiple pylons ,the load path from the intermediate pylons to the side pylons is long and the effect of ancillary piers in the side spans is minimal ,as a result ,no ancillary piers are installed .In the structural system ,the pylons and the main girder are fixed while the girder and piers are separated .The box girder is 43 .84 m wide , with transverse steel diaphragms .The stay cables are fanned out in single cable plane .The pylon looks like the Chinese character“合“ ,and double bearings are installed at the pylons .T he stay vibration mitigation bearings are used as the vibration mitigation and isolation devices of the superstructure ,which are installed below the two side pylons .
出处
《世界桥梁》
北大核心
2014年第6期1-6,共6页
World Bridges
基金
国家自然科学基金(50128013
51468018)
江西省自然科学基金项目(20114BAB216008
20122BAB206004)
江西省教育厅科研项目(GJJ14384
GJJ14352)
关键词
多塔斜拉桥
波形钢腹板
跨中比
钢横隔板
塔梁固结
梁墩分离
双支座
拉索减震支座
multi-pylon cable-stayed bridge
corrugated steel web
side span-to-main span ratio
transverse steel diaphragm
pylon-girder fixity
girder-pier separation
double bearing
stayvibration mitigation bearing
