既有桥梁抗震加固设防标准研究  

Study on Seismic Reinforcement and Fortification Standard of Existing Bridges

作　　者：唐光武[1,2] 刘亮 谢皓宇 刘鑫[4] TANG Guangwu;LIU Liang;XIE Haoyu;LIU Xin(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400067;State Key Laboratory of Bridge Engineering Structural Dynamics,Chongqing 400067;Southwest Municipal Engineering Design&Research Institute of China,Chengdu 610036;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]桥梁工程结构动力学国家重点实验室,重庆400067 [3]中国市政工程西南设计研究总院有限公司,成都610036 [4]中铁二院工程集团有限责任公司,成都610031

出　　处：《公路交通技术》2020年第6期49-53,共5页Technology of Highway and Transport

基　　金：国家重点研发计划项目(2017YFC0806009)。

摘　　要：我国部分桥梁正进入设计寿命和服役年龄的后期,其抗震性能的评估、加固依据等问题引起了业界广泛关注。根据既有公路及城市桥梁遭遇的地震风险水平和新建桥梁地震风险水平一致的评估原则,通过调整、确定可变作用下的设计基准期,按照既有桥梁设计基准期(T<100年)内超越概率水平和新建桥梁设计基准期(T=100年)内超越概率一致的原则来确定既有桥梁的抗震设防标准,并通过定义抗震重要性系数来确定既有公路及城市桥梁的抗震加固设防标准。As some bridges in China are entering the later stages of their design life and service age,the seismic performance evaluation and the basis for seismic reinforcement have attracted more attention in the industry.Based on the principle that the seismic risk level of the existing bridge is consistent with that of the new bridge,the design reference period of variable action is determined by the certain adjustment.The seismic fortification standard for existing bridges is determined by the principle that the probability of exceeding in the design reference period of existing bridges(T<100 years)is consistent with that of the probability of exceeding in the design reference period of new bridges(T=100 years).The concept of seismic importance factor is defined to determine the seismic reinforcement and fortification standards of existing highway and urban bridges.

关 键 词：抗震设防标准 抗震加固 抗震重要性系数 设计基准期 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]