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

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.