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(1 東南大學土木工程學院, 南京 210096; 2 中衡設(shè)計集團股份有限公司, 蘇州 215123)
摘要: 在抗震性能化設(shè)計中,對結(jié)構(gòu)構(gòu)件進行性能水準評價是重要內(nèi)容,現(xiàn)有國內(nèi)外規(guī)范標準主要提供了基于構(gòu)件變形的評價指標. 損傷變量作為損傷力學中表征損傷程度的基本概念,代表材料或構(gòu)件受損后的性能劣化程度,在基于材料本構(gòu)的彈塑性分析中得到廣泛應用,但目前尚未形成統(tǒng)一的計算方法和評價標準. 基于損傷力學理論,結(jié)合現(xiàn)行規(guī)范及相關(guān)研究成果,從理論分析和工程應用的角度,提出了標定混凝土損壞等級與損傷變量對應關(guān)系的方法,并進一步建立了鋼筋混凝土構(gòu)件基于材料指標的評價標準. 結(jié)果表明:基于材料損傷變量的性能化評價方法具有堅實的理論基礎(chǔ),并與現(xiàn)行規(guī)范相銜接,符合軟件應用習慣,對規(guī)范抗震性能化設(shè)計分析與評價具有理論與實踐意義.
關(guān)鍵詞: 混凝土損傷模型; 損傷力學; 損傷變量; 抗震性能化設(shè)計; 評價標準
中圖分類號:TU318+. 1 文獻標志碼:A 文章編號:1002-848X(2022)21-0033-09
DOI:10.19701 / j.jzjg.LS210340
Application of concrete damage variable and evaluation criteria in performance-based seismic design
ZHANG Jin1,2, GONG Minfeng2
(1 School of Civil Engineering, Southeast University, Nanjing 210096, China;2 ARTS Group Co. , Ltd., Suzhou 215123, China)
Abstract: The performance level evaluation of structural members is an important procedure in performance-based seismicdesign. In the existing domestic and foreign standards, the evaluation indexes provided are mainly based on memberdeformation. As a basic concept to characterize the degree of damage in damage mechanics, damage variable represents thedegree of deterioration of the performance of the material or member after damage. Damage variable is widely used in theelastoplastic analysis of material constitutive, but there is no unified calculation method and evaluation standard yet. Basedon the theory of damage mechanics, combined with the current codes and related research results, from the perspective oftheoretical analysis and engineering application, a method for calibrating the corresponding relationship between concretedamage levels and damage variables was proposed, and an evaluation standard for reinforced concrete members based onmaterial indicators was further established. The results show that the performance-based evaluation method based onmaterial damage variable has a solid theoretical basis and relates to the current code, which is in line with the softwareapplication habits and has theoretical and practical significance for standardizing the analysis and evaluation methods inperformance-based seismic design.
Keywords: concrete damage model; damage mechanics; damage variable; performance-based seismic design;evaluation standard
第一作者:張謹,博士,研究員級高級工程師,一級注冊結(jié)構(gòu)工程師,主要從事結(jié)構(gòu)設(shè)計與技術(shù)研究,Email: zhangjin@artsgroup. cn.
[引用本文] 張謹,龔敏鋒. 混凝土損傷變量及評價標準在抗震性能化設(shè)計中的應用[ J]. 建筑結(jié)構(gòu),2022,52(21): 33-41, 138. ZHANG Jin, GONG Minfeng. Application of concrete damage variable and evaluation criteria inperformance-based seismic design[J]. Building Structure,2022,52(21):33-41,138.
