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（1 廣州大學(xué)廣東省地震工程與應(yīng)用技術(shù)重點(diǎn)實(shí)驗(yàn)室， 廣州 510405； 2 中國(guó)建筑科學(xué)研究院， 北京 100013）

［摘要］利用基于材料非線性的精細(xì)化有限元模型，根據(jù)混凝土損傷和鋼材等效塑性變形得到了結(jié)構(gòu)材料、構(gòu)件、樓層、整體結(jié)構(gòu)的損壞等級(jí)并研究了將其作為抗震性能指標(biāo)的合理性。為進(jìn)一步豐富結(jié)構(gòu)抗震性能評(píng)價(jià)指標(biāo)，給出了樓層非線性耗能、整體結(jié)構(gòu)的非線附加阻尼比、剛度退化系數(shù)的計(jì)算方法。將上述計(jì)算和評(píng)價(jià)方法在完全自主研發(fā)的非線性顯式動(dòng)力有限元分析軟件SAUSAGE中完成開(kāi)發(fā)。利用SAUSAGE分析了某超高層框架-剪力墻結(jié)構(gòu)在7組地震動(dòng)不同強(qiáng)度作用下的非線性動(dòng)力響應(yīng)。討論了材料應(yīng)力、截面內(nèi)力、損傷、等效塑性應(yīng)變作為抗震性能評(píng)價(jià)的可行性。對(duì)比了不同強(qiáng)度地震作用下結(jié)構(gòu)層間位移角、層間剪力退化系數(shù)、樓層非線性耗能、樓層損壞等級(jí)作為樓層抗震性能指標(biāo)并判斷結(jié)構(gòu)薄弱樓層的差異。研究了最大層間位移角、基底剪力退化系數(shù)、非線性附加阻尼比、剛度退化系數(shù)、損壞等級(jí)作為結(jié)構(gòu)整體評(píng)價(jià)指標(biāo)的合理性及對(duì)地震動(dòng)的離散性；從統(tǒng)計(jì)意義上分析了最大層間位移角和其他指標(biāo)的相互關(guān)系。

［關(guān)鍵詞］材料非線性； 抗震性能評(píng)價(jià)； 損壞等級(jí)； 非線性顯式動(dòng)力時(shí)程分析；  SAUSAGE軟件

中圖分類號(hào)：TU311-3, TU311-41文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)07-0017-11

Structural seismic performance evaluation method based on material nonlinearity

CAO Shengtao1,2, LI Zhishan1

(1 Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology, Guangzhou University, 

Guangzhou 510405, China; 2 China Academy of Building Research, Beijing 100013, China)

Abstract:Using the refined finite element model based on material nonlinearity, the damage grades of structural materials, members, stories and the overall structure were obtained based on concrete damage and equivalent plastic deformation of steel. The rationality of using them as indexes of seismic performance was studied. In order to further enrich the seismic performance evaluation index of the structure, the calculation methods of the nonlinear energy dissipation on the story, the non-linear additional damping ratio of the overall structure and the stiffness degradation coefficient were given. The above calculation and evaluation methods were developed in a completely independent self-developed nonlinear explicit dynamic finite element analysis software SAUSAGE. Using SAUSAGE, the nonlinear dynamic response of a super high-rise frame-shear structure under 7 groups of ground motions with different seismic intensities was analyzed. The feasibility of material stress, section internal force, damage, equivalent plastic strain as seismic performance evaluation was discussed. The story drift ratio of the structures, the degradation coefficient of the story shear forces, the nonlinear energy dissipation of the stories and the damage grades of the stories under different earthquakes with different seismic intensities were compared as the seismic performance indexes of the floors and the differences of weak floors were judged. The rationality of the maximum story drift ratio, the basement shear degradation coefficient, the nonlinear additional damping ratio, the stiffness degradation coefficient and the damage grade were analyzed as the overall evaluation index of the structure and the dispersion of the ground motion. The correlation between the maximum story drift ratio and other indexes was analyzed statistically.

Keywords:material nonlinearity; seismic performance evaluation; damage grade; nonlinear explicit dynamic time-history analysis; SAUSAGE software

作者簡(jiǎn)介：曹勝濤，博士，工程師，Email: caoshengtao@cabrtech.com