摘要
我国铁路桥梁检定规范中,以墩顶横向振幅作为桥墩横向刚度的控制指标,但计算公式中所考虑的影响因素不是很全面,不能很好地反映桥墩横向振动的规律.本文针对铁路实体墩进行了大量的统计分析,以墩顶横向振幅最敏感的综合指标为变量,从试验和理论两方面研究了铁路实体桥墩横向振动的内在规律,并将实测值和理论值与"检规"通常值进行了比较.研究表明,仅与桥墩尺寸有关的"检规"通常值未能反映梁墩体系共同振动的特性,墩顶横向振幅的限值应与梁墩体系的结构特性有关,在后续研究中应制定更合理的桥墩横向刚度检定标准.
In the inspecting code of Chinese railway bridges,the control index of lateral stiffness of piers is lateral maximum amplitude of pier top,but the influence factors which are considered in code are not comprehensive,and can not express the rule of the lateral vibration of piers exactly.In this paper,the statistic analysis of railway solid piers is performed.Based on the synthesis index,which is most sensitive to the lateral maximum amplitude of pier top,the lateral vibration rule of railway solid piers is investigated from the aspects of both practice and theory,then the measured and calculated value are compared with the limited value in inspecting code.It is concluded that the limited value in inspecting code,which is only associated with piers dimension,can not reflect the characteristics of couple vibration between the beams and piers,and the lateral limited amplitude should be associated with the structural characteristics of beam-pier system.It is suggested that more rational standard of piers lateral stiffness should be established in the following research.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2009年第1期77-80,90,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
铁道部科技研究开发计划项目资助(2003G024)
关键词
桥墩
铁路
横向振动
横向振幅
横向刚度
bridge piers
railway
lateral vibration
lateral amplitude
lateral stiffness
