桥梁结构体系评价——以港珠澳大桥青州航道桥为例

Evaluation of Bridge Structural--System Taking the Qingzhou Channel Bridge of Hong Kong-Zhuhai-Macao Bridge as an Example

以港珠澳大桥青州航道桥为例,从功能、外形、外部约束、内部连接和刚度分配5个方面对其进行了简单的评价。结果表明:青州航道桥的修建对珠三角的经济发展具有促进作用,对内地和港澳的文化交流具有提高作用;其外形美观,桥型布置相对合理,边中跨比相对较大,斜拉索构造采用平行钢丝存在可优化性;外部约束和内部连接能充分考虑了桥位的水文地质条件和各个构件的受力特性,设置十分合理;梁、塔、拉索的刚度分配相对合理,但存在斜拉索的截面积过小,轴向刚度过小,对加劲梁和索塔的受力不利的问题,但总体相对合理。

Taking the Qingzhou Channel Bridge of the Hong Kong-Zhuhai-Macao Bridge as an example,this paper briefly evaluates it from five aspects:function,shape,external restraint,internal connection and stiffness distribution.The results show that:the construction of Qingzhou Channel Bridge can promote the economic development of the Pearl River Delta and improve the cultural exchange between the mainland and Hong Kong and Macao;its appearance is beautiful,the bridge layout is relatively reasonable,the side-to-mid-span ratio is relatively large;The use of parallel steel wires in the stay cable structure can be optimized;the external constraints and internal connections can fully consider the hydrogeological conditions of the bridge location and the force characteristics of each component,and the settings are very reasonable;the stiffness distribution of beams,towers and cables is relatively reasonable,but there are problems that the cross-sectional area of the stay cable is too small and the axial stiffness is too small,which is unfavorable for the stress of the stiffening beam and the tower,but the overall is relatively reasonable.