摘要
针对压力场连通管桥梁位移监测动态效应问题,本研究根据连通管的基本原理,基于结构动力学理论,首次建立了连通管动态压强理论计算公式,并进行了模型试验,理论计算值与试验值吻合较好,验证了理论公式的正确性.参数研究结果表明,连通管动态压强与管道位移量和管道倾角呈正相关关系,随测点至管道最高点加速度分布的总量增大而线性增大.研究结果为提高桥梁健康监测系统动态挠度测量精度,准确评估桥梁结构工作性能,具有重要的意义.
Based on the communicating pipe principle and structure dynamics theory, a dynamic hy- draulic equation is derived for communicating pipe by considering the influence of structure vibration on liquid pressure in communicating pipe. The derived equation is used to study the dynamic effect of hy- draulic displacement monitoring system and the obtained result is consistent with the model experiment. The parameter analysis shows that the dynamic hydraulic pressure of the communicating pipe is positively related to the pipe displacement, the pipe longitudinal gradient, and the pipe acceleration. The research results are valuable for improving the dynamic deflection measurement accuracy of a bridge health monito- ring system and evaluating the working performance of a bridge.
出处
《暨南大学学报（自然科学与医学版）》
CAS
CSCD
北大核心
2013年第3期301-305,共5页
Journal of Jinan University(Natural Science & Medicine Edition)
基金
国家自然科学基金项目(51078093
11272095)
广东省科技计划项目(2011B010300026
2012B04032005)
广州市科技计划攻关重大专项(2011Y2-00006)
广东省教育厅科技创新重点项目(2012CXZD0028)
关键词
桥梁
连通管
健康监测
动态液压
bridge
communicating pipe
health monitoring
dynamic hydraulics
