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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第5期    总第49期    2012年10月

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文章编号:1672-7029( 2012) 05-0019-06
罕遇地震作用下HADAS 加固某大跨度结构的静力弹塑性分析
陈代果,姚勇,邓勇军,杨亚龙,王海军

(西南科技大学土木工程与建筑学院,四川绵阳621010)

摘 要: 汶川大地震后,受影响的部分地区设防烈度进行了调整,设防烈度调整后大部分建筑尤其是公共建筑都进行了抗震加固,为了保证加固后结构的抗震性能,在大型复杂工程的结构分析中逐渐采用了基于性能分析方法。以地震时正在修建的某大跨度体育教学训练中心为背景,针对设防烈度提高由6 度提高至7 度的情况,采用Push-Over 法对其采用软钢阻尼器加固前后的有限元模型进行7 度罕遇地震作用下结构的弹塑性分析,研究该结构在7 度罕遇地震作用下的内力、变形与破坏情况,比较加固前后结构模型的动力特性与抗震性能,研究结构在大震作用下的薄弱环节与塑性铰的分布特点。研究结果表明: 加固前后模型均能满足7 度罕遇地震抗倒塌验算,但是,原结构二层位置较为薄弱,容易发生局部破坏,而加固后结构刚度更为均匀,大震下的抗倒塌能力增强。

 

关键字: 大跨结构; 软钢阻尼器; 烈度; 抗震加固; Push-Over

Study on earthquake resistant performance of a large span structure strengthened with HADAS
CHEN Dai-guo,YAO Yong,DENG Yong-jun,YANG Ya-long,WANG Hai-jun

Southwest University of Science and Technology of Civil Engineering,Mianyang 621010,China

Abstract:Seismic fortification intensity has been adjusted in some areas which were affected in the Wenchuan-earthquake.It was seismic strengthening for most of the buildings especially the public buildings after the adjustment.In order to ensure the seismic performance of the structure after reinforcement , the analysis method based on performance was gradually applied in the large and complex engineering structure analysis.A large span sports training center was used taking construction as background.According to the fact that the fortification intensity was improved from 6 degrees to 7 degrees,Push-Over method was used to analyze the structure’s elastic-plastic performance under the action of the rare earthquake of 7 degrees by using the finite element models with the mild steel damper before and after reinforcement.The internal force ,deformation and destruction of the structure were studied in the action of the rare earthquake,comparing the dynamic characteristics and seismic performance of the models,and researching distribution of weak links and plastic hinge of the models under the large earthquake.The results show that the models can meet collapse resistant checks under 7 degrees of the rare earthquake before and after reinforcement.The second floor of the original structure is relatively weak,and it can emerge local damage easily.But the structure’s stiffness is more uniform after reinforcement,and the structure has large resistance of the collapsed ability.

 

Key words: big span structure; HADAS; seismic intensity; seismic strengthening; Push-Over

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
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