某钢筋混凝土连续曲线梁桥裂缝事故分析与设计修正  被引量:5

Crack Accident Analysis and Design Modification of Reinforced Concrete Curved Continuous Beam Bridge

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作  者:郑步全[1] 吴培峰[1] 

机构地区:[1]同济大学桥梁工程系,上海200092

出  处:《公路交通科技》2004年第11期35-38,共4页Journal of Highway and Transportation Research and Development

摘  要:以某钢筋混凝土连续曲线梁匝道桥在施工过程中出现的过宽裂缝成因的研究为实例,介绍钢筋混凝土桥梁非正常开裂事故原因的分析方法。在事故调查分析中运用结构的对称性质,考虑基础不均匀沉降对结构内力的影响及剪力滞效应对箱梁截面正应力分布的影响,并对原设计进行了修正。最后给出了钢筋混凝土桥梁裂缝控制的若干建议。Through the research practice on the causes of unexpected cracks appeared during the construction of a reinforced concrete curved continuous ramp bridge,methods to analyze the causes of unexpected cracks which occurred in reinforced concrete bridges are introduced in this paper.In survey and analysis of the crack accident,symmetrical properties of a structure are applied,foundation settlement's effect on internal forces and shear lag's effect on normal stress distribution of the box-girder cross sections are considered,design modifications are presented.Lastly,some suggestions on crack control of reinforced concrete bridges are also given.

关 键 词:钢筋混凝土桥 裂缝 基础沉降 曲线梁 配筋设计 

分 类 号:U445.6[建筑科学—桥梁与隧道工程]

 

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