桥梁旋转式伸缩装置的缝宽控制性能  

Width Control Performance of Swivel-type Expansion Joints on Bridges

作　　者：辛荣亚[1] 张启伟[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《公路交通科技》2013年第5期52-57,62,共7页Journal of Highway and Transportation Research and Development

摘　　要：针对桥梁的运营过程中某些桥梁的伸缩装置出现的缝宽不均匀、单缝缝宽过大等缺陷给行车安全带来的隐患,结合工程实例,基于力学分析对旋转式伸缩装置的缝宽控制性能进行了研究,讨论了影响缝宽均匀性的主要因素,提出了改善缝宽控制性能的措施。研究结果表明:在伸缩量较大时,旋转式伸缩装置的缝宽可能存在不均匀,且这种不均匀主要集中在靠近伸缩装置两端的单元上;伸缩装置的材料特性、安装工艺和构造参数对缝宽不均匀性都有影响,而构造参数的影响更为显著;布置合理的限位装置可有效改善缝宽的不均匀性。For the danger brought to the traffic by the defects of expansion joints, such as unevenness of widths and overlarge widths, which are found during the service of some bridges, a research about the width control performance of swivel-type expansion joints is conducted based on mechanical analysis with an engineering example. Thus, the width control performance of swivel-type expansion joints is researched based on mechanical analysis, the main factors which have influence on the widths evenness are discussed and the measures to improve the width control performance are proposed. The result indicates that （1） the widths of the swivel joint, especially the elements at the ends, are uneven when the joint is suffering large displacement; （2） the influences of the material property, the installation, and the configuration parameters of the expansion joint on the unevenness are all significant, and the influence of the last one is greatest; the unevenness can be decreased effectively by suitably arranged stoppers.

关 键 词：桥梁工程 缝宽控制 力学分析 旋转式伸缩装置 缝宽均匀性 

分 类 号：U443.31[建筑科学—桥梁与隧道工程]