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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第10卷    第6期    总第56期    2013年12月

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文章编号:1672-7029( 2013) 06-0033-07
拼接方式对PC 连续刚构桥力学性能的影响
吕韶全,唐冕,徐侠

(中南大学土木工程学院,湖南长沙410075)

摘 要: 基于空间有限元分析方法,研究大跨度预应力混凝土连续刚构桥按刚接和铰接2 种不同的拼接方式在车辆荷载、收缩徐变、基础不均匀沉降等作用下的桥梁结构受力性能。分析结果表明: 不同的拼接方式对桥梁结构的纵向应力影响不大,但是对结构的横向应力和整体刚度影响较大; 刚接结构在基础不均匀沉降和车道荷载作用下的效应更为不利; 施工时需采取特别措施防止铰接处的纵向裂缝并加强结构的横向连接刚度,对于解决同类桥梁的拼接技术难题具有一定的参考意义。

 

关键字: 连续刚构; 拼接桥梁; 预应力混凝土

Influence of extended form on mechanical properties of PC continuous rigid frame bridge
LU Shaoquan,TANG Mian,XU Xia

College of Civil Engineering,Central South University,Changsha 410075,China

Abstract:Based on spatial finite element analysis method,the structure performance of two different forms,rigid connection and hinged connection of long-span pre-stressed concrete continuous rigid frame bridge was analyzed in terms of vehicle load,the effect of concrete shrinkage and creep,non-uniformity settlement of foundation etc.The results show that two different ways of connection form have a minor effect on the longitudinal stress of the bridge structure,but the influence on the transverse stress of structure and the integral rigidity is relative large.Rigid connection structures poss unfavorable effect under the uneven settlement of foundation and lane loads.Special measures should be taken in construction to prevent the longitudinal cracks in the articulated sections and the transverse coupling stiffness of the structure should be strengthen,which has certain reference significance in solving similar splicing technology issues in bridge engineering.

 

Key words: continuous rigid frame; extended bridge; pre-stressed concrete

ISSN 1672-7029
CN 43-1423/U

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