【摘要】 鸭绿江界河公路大桥是连接朝鲜的跨国性重要工程,结合桥址处实际工程条件,选取双塔双索面钢箱梁斜拉桥[跨径布置为(86+229+636+229+86)m,采用现浇H形桥塔]和双塔双索面钢-混结合梁斜拉桥[跨径布置为(87+228+636+228+87)m,采用现浇倒Y形桥塔]2种桥型方案进行比选。采用平面杆系程序桥梁博士V3.2.0分别建立2种方案的有限元模型,按整体成型对桥梁成桥阶段及运营阶段进行整体受力分析,并对2种方案的施工便利性、耐久性及经济性进行对比分析。分析结果表明,钢箱梁斜拉桥结构受力较优,且其施工便利、工期较短、抗震性能好,因此该桥最终确定采用五跨双塔双索面钢箱梁斜拉桥方案。更多还原

【Abstract】 The Yalu Boundary River Highway Bridge is an important international project connecting China and DPR Korea.In the light of the actual project conditions at the bridge site,two proposed bridge types for the main bridge of the bridge were compared,i.e.a steel box girder cable-stayed bridge with double pylons and double cable planes(the span arrangement being(86+229+636+229+86) m and the pylons being the H-shape concrete structures to be cast in situ) and a steel and concrete composite girder cable-stayed bridge with double pylons and double cable planes(the span arrangement being(87+228+636+228+87) m and the pylons being the inverted Y-shape concrete structures to be cast in situ).The plane link program Doctor Bridge V3.2.0 was used to respectively set up the finite element models for the two bridge types,the global mechanical behavior of the two bridges at completion and operation stages were analyzed and the construction convenience,durability and economy were analyzed as well.The results of the analysis show that the structural mechanical behavior of the steel box girder cable-stayed bridge is more advantageous,the construction is more convenient,the construction time schedule is shorter and the seismic performance is better and therefore the box girder bridge having 5 spans,double pylons and double planes is finally selected.更多还原