基于监测数据的连续刚构桥梁“零活载点”识别方法  

Null Live Load Point Identification Method of Continuous Rigid Frame Bridges Based on Monitoring Data

作　　者：吴海军[1] 韦跃[1] 黄友帮 王身宁 周志祥[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2013年第S1期884-887,共4页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50608072);重庆市交委科技项目(JTKJ 2010-10);山区桥梁与隧道工程国家重点实验室培育基地2012科技项目(CQSLBF-Y12-5)

摘　　要：通过分析介绍桥梁健康监测中数据分析的现状及存在的问题,提出了一种基于长期监测数据的桥梁结构"零活载点"识别的原理及其方法,给出了具体的识别过程及判断条件。根据实桥桥梁监测数据的规律,设定每天凌晨2:00—4:00作为"零活载点"识别的数据筛选时间段,取顶、底板应力同为最小时刻作为零活载点。通过每天确定一个零活载点作为基准状态,以此为参照点来处理每天的监测数据,大大减少了系统累积误差及温度等不确定因素对于监测数据处理的影响。By analyzing and introducing the current situation and the problems in data analysis of bridge health monitoring,a null point identification method of live load for bridge structure based on the long-term monitoring data was proposed.The time from 2:00 to 4:00 in every morning was set as the data screening period,and the null points of live load were taken when the stress of the roof and floor were both minimum.By determining a null point of live load as the reference state daily,and the obtained point was taken as referential point to deal with the monitoring data daily.The proposed method greatly reduces the impact of the cumulative error and the uncertainty of temperature on the processing of monitoring data.

关 键 词：连续刚构桥 零活载点 监测数据 温度 

分 类 号：U446[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]