考虑安全性与正常使用性能的大件车辆过桥评估方法  

ASSESSMENT METHOD FOR BRIDGES UNDER CUSTOMIZED TRUCKS BY INCORPORATING SAFETY AND SERVICEABILITY

作　　者：袁阳光 周广利 高文博 韩万水[4] 王涛[4] 王俊峰 YUAN Yang-guang;ZHOU Guang-li;GAO Wen-bo;HAN Wan-shui;WANG Tao;WANG Jun-feng(Xi’an University of Architecture and Technology,College of Civil Engineering,Xi’an,Shaanxi,710055,China;Shandong Institute of Transportation Science,Ji'nan,Shandong 250102,China;Hong Kong-Zhuhai-Macao Bridge Administration,Zhuhan,Guangdong 519060,China;Chang’an University,Highway College,Xi’an,Shaanxi,710064,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]山东省交通科学研究院,山东济南250102 [3]港珠澳大桥管理局,广东珠海519060 [4]长安大学公路学院,陕西西安710064

出　　处：《工程力学》2021年第7期147-158,共12页Engineering Mechanics

基　　金：国家重点研发计划“综合交通运输与智能交通”重点专项2019年度定向项目“港珠澳大桥智能化运维技术集成应用”,课题二“跨海集群设施服役状态评估及智能维养技术与装备项目(2019YFB1600702)”;国家自然科学基金面上项目(51878058);陕西省自然科学基础研究计划一般项目-青年项目(2020JQ-665)。

摘　　要：为支撑近年来国内各省份大件运输车辆过桥智能评估管理系统建立工作,同时考虑安全性与正常使用性能的要求建立车辆过桥评估方法。基于安全性与正常使用性能要求形成了大件运输车辆过桥评估方法框架,并依托可靠度理论对评估目标可靠指标、分项系数校准、临界荷载效应比值确定等问题展开研究;选用高速公路典型中小跨径梁式桥进行案例分析;针对评估结果显示不具备可通行性的车辆,形成了系统的通行保障策略,以满足大件运输车辆的强制通行属性。研究发现,当大件运输交通量增大时,应通过评估目标可靠指标提升实现对评估方法适当收紧,考虑年均大件运输交通量为50辆~200辆时,恒载效应、大件运输车载效应及抗力分项系数取值范围分别为[1.069,1.077]、[1.115,1.131]及[1.165,1.225],桥梁构件安全性评估结果受构件技术状况等级影响显著,年均大件运输交通量对正常使用性能评估结果影响比较明显。To support the development of intelligent assessment and management system of bridges under customized transportation vehicle(CTV)in many provinces of China,an assessment method was developed by considering the requirements of safety and serviceability simultaneously.The bridge assessment method framework under CTV was proposed by including the requirements of safety and serviceability.In addition,the target reliability indices for assessment,the calibration of partial factors and the determination of critical load effect ratios were investigated according to reliability theory.Case studies were carried out by selecting the typical small-to-medium span bridges of expressway.For the CTVs not satisfying the passage requirements,the systematic passage supporting strategy was provided.It is found that the assessment method should be stricter with the increasing of CTV traffic volume.The ranges of partial factors of dead load effect,CTV load effect and resistance are[1.069,1.077]、[1.115,1.131]and[1.165,1.225],respectively,when the annual average traffic volume of CTV is considered as 50~200.The safety assessment results of bridge components are significantly influenced by the technical levels,and the annual average traffic volume of CTV has obvious influences on the serviceability assessment results.

关 键 词：桥梁工程 大件运输车辆 评估方法 安全性 正常使用性能 可靠度 

分 类 号：U44[建筑科学—桥梁与隧道工程]