预应力混凝土连续箱梁桥LCPA法剩余使用寿命预测  

Residual Life Prediction of PC Continuous Beam Bridge Based on LCPA

作　　者：王继林 夏叶飞 袁微微 宗周红[2] WANG Jilin;XIA Yefei;YUAN Weiwei;ZONG Zhouhong(China Design Group Co., Ltd., Nanjing 210014, China;School of Civil Engineering, Southeast University, Nanjing 210096, China)

机构地区：[1]华设设计集团股份有限公司,南京210014 [2]东南大学土木工程学院,南京210096

出　　处：《交通科技》2022年第3期64-68,共5页Transportation Science & Technology

基　　金：江苏省交通运输厅基金项目(2013Y07)资助。

摘　　要：目前大量在役桥梁均面临评估全寿命周期内安全性和耐久性预测问题。在当前研究成果基础上,文中综合考虑服役全寿命期运营荷载(活载)效应概率分布和构件耐久性退化模型,预测桥梁结构安全可靠度,以综合实现桥梁剩余使用寿命预测。依据动态称重系统数据得出桥梁的荷载(活载)效应概率模型,同时建立随时间退化的构件抗力衰减概率模型,成功预测了京沪高速(G2)新沂河大桥的剩余使用寿命,实测表明,从LCPA(全寿命周期性能评估)角度预测剩余使用寿命结果和传统实桥试验结果一致。At present,a large number of bridges in service are facing the problem of how to evaluate the safety and durability in the whole life cycle.Based on the current research results of relevant industries,the safety and reliability of bridge structure is predicted to comprehensively realize the residual service life prediction of the bridge,by considering the load variation and durability degradation in the whole life cycle.The load probability model of the bridge based on the data of WIM is obtained,the resistance attenuation probability model of degraded components with time is established,and the residual life of Xinyi River Bridge on Beijing Shanghai Expressway(G2)is successfully predicted.The measured results show that the residual service life predicted from the perspective of LCPA(life cycle performance evaluation)is consistent with the traditional real bridge test results.

关 键 词：全寿命周期性能评估 剩余使用寿命预测 荷载概率模型 抗力衰减概率模型 目标可靠指标目标失效概率 

分 类 号：U448.21[建筑科学—桥梁与隧道工程] U445.7[交通运输工程—道路与铁道工程]