既有结构不同后续使用年限鉴定分级系数的求解  

Solution on the Coefficients of Appraisal Identification for the Existing Structure Under Different Subsequent Service Lives

作　　者：蒋济同[1] 吴颖欣[1] 杜德润[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2017年第8期151-158,共8页Periodical of Ocean University of China

摘　　要：基于结构构件承载能力分级原则,求解出既有结构与新建结构不同后续使用年限鉴定分级系数。首先,根据既有结构与新建结构抗力数理模型的不同,归纳整理出对应的抗力统计参数;其次,根据荷载标准值调整前后的不同,求解出设计基准期下对应的鉴定分级系数;再次,依据后续使用年限调整系数与统计参数的不同,计算出现行规范条件下不同后续使用年限对应的鉴定分级系数。最后,加入考虑抗力衰减因素,对比得出鉴定分级系数的安全富余程度,为将来实际鉴定工作提供参考和借鉴。Based on the principle of structures ultimate classification, the coefficients for appraisal iden- tification of different subsequent service lives are calculated for existing structures and new structures respectively, Firstly, the resistance statistical parameters are obtained according to different mathemati- cal models of resistance for existing structures and new structures. Secondly, the coefficients for ap- praisal identification under the circumstance of design reference period are solved before and after the ad- justment of characteristic values of load. Thirdly, the coefficients for appraisal identification which meet the requirements of the current standard are computed corresponding to the adjustment factors and mathematical statistics parameters of different subsequent service lives. Finally, safety margin of the co- efficients for appraisal identification are achieved by comparison when considering the resistance attenua- tion, which is analyzed for the future practical identification project.

关 键 词：可靠度 鉴定分级系数 既有结构 后续使用年限 抗力衰减 

分 类 号：TU2[建筑科学—建筑设计及理论]