基于对照经验公式的构件本构模型离线更新混合试验方法  

Hybrid simulation with component constitutive model off-line updating based oncomparative empirical formula

作　　者：郭玉荣[1,2] 刘兆民 GUO Yurong;LIU Zhaomin(College of Civil Engineering,Hunan University,Changsha 410082,China;Key Laboratory of Building Safety and Energy Efficiency,Ministry of Education,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]建筑安全与节能教育部重点实验室,湖南长沙410082

出　　处：《铁道科学与工程学报》2021年第6期1537-1545,共9页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51878259,51161120360)。

摘　　要：模型更新混合试验可以从构件本构、截面本构和材料本构3个层面来更新数值子结构的模型参数进而提高混合试验的精度。由于构件本构模型更新仅能对构件参数相同的数值子结构进行更新,因此在复杂结构抗震性能研究中存在局限性。以构件本构模型更新为基础,提出对照经验公式更新方法来完成框架结构中构件参数不同相似构件模型更新。通过1榀采用不同截面配筋率的2层2跨弹性钢筋混凝土框架的离线模型更新数值仿真,验证对照经验公式模型更新方法的可行性。应用本文方法,进行1榀5层3跨弹塑性钢筋混凝土框架离线模型更新数值仿真,并重复利用离线更新试验数据对1榀3层2跨弹塑性钢筋混凝土框架进行时程分析。研究结果表明:在离线模型更新混合试验中基于对照经验公式的构件本构模型更新与传统构件本构模型更新相比具有较高的精度。The model parameters of numerical substructures can be updated from three different levels:component constitutive,cross-sectional constitutive and material constitutive,which enhance the accuracy of hybrid test.The constitutive model updating of components only applies to the numerical substructure components with the same component parameters,which causes many limitations in the study of seismic performance of complex structures.Based on the method of component constitutive model updating,this paper proposes an updating method by contrasting empirical formula to complete the updating of similar component models with different parameters in complex frame structures.Through the off-line model updating numerical simulation of a 2-story 2-bay elastic reinforced concrete frame with different reinforcement ratio,the feasibility of the comparative empirical formula model updating method was verified. By applying the method proposed in thisthesis, hybrid numerical simulation with model updating of a 5-story 3-bay elasto-plastic reinforced concreteframe was conducted, and the offline updating test data was repeatedly used to analyze the time history of a 3-story 2-bay elasto-plastic reinforced concrete frame. The results indicate that the component constitutive modelupdating based on the comparative empirical formula has higher accuracy than applying the traditionalcomponent constitutive model updating in the off-line model updating hybrid test.

关 键 词：经验公式 本构模型 离线模型更新 IMK恢复力模型 

分 类 号：TU317[建筑科学—结构工程]