混凝土损伤变量及评价标准在抗震性能化设计中的应用  

Application of concrete damage variable and evaluation criteria in performance-based seismic design

作　　者：张谨 龚敏锋 ZHANG Jin;GONG Minfeng(School of Civil Engineering,Southeast University,Nanjing 210096,China;ARTS Group Co.,Ltd.,Suzhou 215123,China)

机构地区：[1]东南大学土木工程学院,南京210096 [2]中衡设计集团股份有限公司,苏州215123

出　　处：《建筑结构》2022年第21期33-41,138,共10页Building Structure

摘　　要：在抗震性能化设计中,对结构构件进行性能水准评价是重要内容,现有国内外规范标准主要提供了基于构件变形的评价指标。损伤变量作为损伤力学中表征损伤程度的基本概念,代表材料或构件受损后的性能劣化程度,在基于材料本构的弹塑性分析中得到广泛应用,但目前尚未形成统一的计算方法和评价标准。基于损伤力学理论,结合现行规范及相关研究成果,从理论分析和工程应用的角度,提出了标定混凝土损坏等级与损伤变量对应关系的方法,并进一步建立了钢筋混凝土构件基于材料指标的评价标准。结果表明:基于材料损伤变量的性能化评价方法具有坚实的理论基础,并与现行规范相衔接,符合软件应用习惯,对规范抗震性能化设计分析与评价具有理论与实践意义。The performance level evaluation of structural members is an important procedure in performance-based seismic design.In the existing domestic and foreign standards,the evaluation indexes provided are mainly based on member deformation.As a basic concept to characterize the degree of damage in damage mechanics,damage variable represents the degree of deterioration of the performance of the material or member after damage.Damage variable is widely used in the elastoplastic analysis of material constitutive,but there is no unified calculation method and evaluation standard yet.Based on the theory of damage mechanics,combined with the current codes and related research results,from the perspective of theoretical analysis and engineering application,a method for calibrating the corresponding relationship between concrete damage levels and damage variables was proposed,and an evaluation standard for reinforced concrete members based on material indicators was further established.The results show that the performance-based evaluation method based on material damage variable has a solid theoretical basis and relates to the current code,which is in line with the software application habits and has theoretical and practical significance for standardizing the analysis and evaluation methods in performance-based seismic design.

关 键 词：混凝土损伤模型 损伤力学 损伤变量 抗震性能化设计 评价标准 

分 类 号：TU318.1[建筑科学—结构工程]