摘要
为分析预应力混凝土连续梁(刚构)带加劲拱桥型(简称连续梁拱桥或连续刚构拱桥)的合理性,以技术标准相同的1座(72+128+72)m铁路连续梁桥与1座(64+128+64)m铁路连续梁拱桥为研究对象,从结构设计、施工、运营维护等方面对2种桥型进行对比分析。结果表明:相比一般连续梁桥,连续梁拱桥是2种不同受力体系(梁与拱)组合而成的不合理的复合结构;不合理的结构体系使得结构几何尺寸和工程数量明显增加,造成施工工艺复杂、工期延长,从而导致工程总造价显著增加;梁与拱的相互交叉作用导致0号块处的受力相对复杂,增加了结构的安全风险;复合结构的运营养护工作较单一结构体系更多,养护费用更高。
In order to analyze the rationality of prestressed concrete continuous beam(rigid frame)with stiffened arch bridge type(referred to as continuous beam arch bridge or continuous rigid frame arch bridge),by taking a(72+128+72)m railway continuous beam bridge and a(64+128+64)m railway continuous beam arch bridge which comply with the same technical standards as research objects,we comparatively analyzed the two types of bridges from the aspects of structural design,construction,operation,and maintenance.The results show that the continuous beam arch bridge is an unreasonable composite structure with two different mechanical systems(beam and arch).Because of the unreasonable structure,the geometric dimensions and quantities of stuctures are required to increase obviously,the construction process becomes complicated,and the construction period is prolonged,which finally lead to the significant increase of the total project cost.The interaction between beam and arch at No.0 block will relatively complicate the stresses,which increases the safety risk of the structures.The operation and maintenance work of composite structures is more burdensome than that of single structure,and the maintenance cost is higher.
作者
马庭林
杨国静
曾永平
庞林
MA Ting-lin;YANG Guo-jing;ZENG Yong-ping;PANG Lin(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)
出处
《桥梁建设》
EI
CSCD
北大核心
2018年第6期12-17,共6页
Bridge Construction
关键词
铁路桥
连续梁桥
连续梁拱桥
预应力混凝土结构
加劲拱
桥型比选
railway bridges
continuous beam bridges
continuous beam arch bridges
prestressed concrete structure
stiffened arch
comparison of bridge types
