大跨混凝土刚构桥参数识别和标高控制动态可靠度评估  

Parameter identification and dynamic reliability evaluation of elevation control for long-span concrete rigid bridge

作　　者：孙传智[1,2] 李爱群[1] 缪长青[1] 乔燕[2] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096 [2]宿迁学院建筑工程系,宿迁223800

出　　处：《东南大学学报（自然科学版）》2012年第1期104-108,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA04Z416);国家自然科学基金重点资助项目(50538020);国家自然科学基金资助项目(51078080);国家杰出青年基金资助项目(50725828);江苏省高校自然科学研究资助项目(10KJB58005)

摘　　要：针对大跨混凝土刚构桥成桥线形对桥梁受力影响很大这一问题,介绍了施工过程中影响桥梁线形的主要结构因素及其概率分布.提出了基于响应面法进行大跨混凝土刚构桥参数识别和标高控制动态可靠度评估方法,该评估方法包括试验设计、有限元分析、响应面函数拟合、参数识别和标高控制动态可靠度评估.以镇大公路运河大桥为例,利用施工监测数据进行结构施工过程中的参数识别,对施工过程中的标高控制动态可靠度进行评估.通过标高控制动态可靠度来确定各关键截面的允许施工误差,将参数识别和标高控制动态可靠度相结合实现施工过程中的线形控制.The finial linear form of long-span prestressed concrete rigid frame bridges affects its stress state.The factors affecting the finial line are introduced,and their probability distributions are also introduced.The method of dynamic reliability evaluation and parameter identification for large-span concrete bridge is put forward based on the response surface during construction monitoring.The method includes experimental design,finite element analysis,fitting the response surface function and evaluating the dynamic reliability.Taking the practical engineering of Zhenda highway canal bridge for example,the parameters were identified and the dynamic reliability during construction process were evaluated,and the allowed construction error of key section was determined using dynamic reliability data.The ideal final linear form was achieved by combing structure parameter identification and dynamic reliability evaluation.

关 键 词：大跨混凝土刚构桥 响应面法 参数识别 标高控制 动态可靠度 

分 类 号：U448.232[建筑科学—桥梁与隧道工程]