基于监测的拱桥吊杆车辆荷载效应模型  

Monitoring Data Based Traffic-load Effect Model for Arch Bridge Suspenders

作　　者：高欣[1] 周道成[1] 欧进萍[1,2] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [2]大连理工大学土木水利学院,辽宁大连116024

出　　处：《公路交通科技》2010年第7期65-68,99,共5页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金(重点项目)(50538020);交通部西部交通建设科技资助项目(200631822349)

摘　　要：针对目前尚无拱桥吊杆车辆荷载效应概率模型的问题,利用监测数据研究建立了拱桥吊杆实际车辆荷载效应模型。介绍了某钢管混凝土拱桥吊杆车辆荷载效应监测系统的组成模块及各模块的功能,通过监测系统采集获得了579个吊杆实测车辆荷载效应监测数据。以所得监测数据为研究对象。采用统计方法,分析了吊杆实际车辆荷载效应截口分布类型;采用蒙特卡罗模拟法,分析了设计基准期内吊杆车辆荷载效应最大值分布类型。结果表明,拱桥吊杆车辆荷载效应截口分布服从对数正态分布;设计基准期内车辆荷载效应最大值服从广义极值分布;利用监测数据建立的吊杆车辆荷载效应模型可以较好地反映桥梁的实际车辆荷载情况。Focused on the problem that there was no traffic-load effect model for arch bridge suspenders, the health monitoring data based traffic-load effect model was studied. The composition modules and their functions of the bridge health monitoring system （BSHM） set up on a concrete-filled steel tube arch bridge was introduced to obtain daily traffic-load effect of suspenders. The section distribution of suspender traffic-load effect was researched using statistical approach based on the 579 monitoring data obtained by the BSHM. The probability distribution of maximum traffic-load effect on the suspenders during design reference period was given using Monte Carlo methods. The result shows that （1） the section distribution of suspender traffic-load effect follows lognorrnal distribution and the probability distribution of maximum traffic-load effect during design reference period follows generalized extreme -value distribution. The monitoring data based traffic-load effect model of suspender could reflect the real traffic-load situation of the bridge.

关 键 词：桥梁工程 拱桥 车辆荷载效应模型 统计分析 吊杆 健康监测 

分 类 号：U448.225[建筑科学—桥梁与隧道工程] U441.2[交通运输工程—道路与铁道工程]