嵩岳寺塔地震响应及最不利受力状态分析
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摘要
采用数值模拟方法对嵩岳寺塔在多遇、设防和罕遇地震作用下的地震响应及最不利受力状态进行了分析,为后续结构安全动态监测提供了基础数据。分析结果表明:质量和刚度关于中轴面呈对称分布,塔身结构整体性较好。地震作用下,结构呈现一阶弯曲变形,没有表现出明显的鞭梢效应。1层塔身的变形最为严重,是结构的薄弱环节。罕遇地震作用下,上部塔身开始进入弹塑性状态,其他情况下仍处于弹性状态。结构承压性能较好,但门洞顶部的水平抗拉承载力存在一定不足,7层以下塔身外侧的竖向抗拉承载力存在一定不足,12层以下塔身中轴面附近的抗剪承载力存在一定不足,且门洞顶部受剪最严重。
In order to provide basic data for forthcoming dynamic monitoring of the pagoda's safety in Songyue Temple,its seismic response and the most disadvantaged stress status with the action of frequent earthquakes,fortification earthquakes and rare earthquakes were studied by numerical simulation method. The results indicated that the integrity of the structure,with the symmetrical distributions of the mass and stiffness in the axial plane,is good enough. Under the action of earthquake,the pagoda' s response is dominated by the first-order bending deformation. The ground floor,as weak link of the structure,has the most serious deformation. Under the action of rare earthquakes,the upper body enters elastic-plastic status while itis still in elastic status in other cases. Compared with its redundant bearing capacity,there are some deficiencies of the horizontal tensile capacity at the top of the gate,and the vertical tensile capacity of the outside below 7 th floor. Moreover,the shear capacity near middle surface below 12 th floor is insufficient,especially at the top of the gate.
In order to provide basic data for forthcoming dynamic monitoring of the pagoda's safety in Songyue Temple,its seismic response and the most disadvantaged stress status with the action of frequent earthquakes,fortification earthquakes and rare earthquakes were studied by numerical simulation method. The results indicated that the integrity of the structure,with the symmetrical distributions of the mass and stiffness in the axial plane,is good enough. Under the action of earthquake,the pagoda' s response is dominated by the first-order bending deformation. The ground floor,as weak link of the structure,has the most serious deformation. Under the action of rare earthquakes,the upper body enters elastic-plastic status while itis still in elastic status in other cases. Compared with its redundant bearing capacity,there are some deficiencies of the horizontal tensile capacity at the top of the gate,and the vertical tensile capacity of the outside below 7 th floor. Moreover,the shear capacity near middle surface below 12 th floor is insufficient,especially at the top of the gate.
引文
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[2]潘毅,王超,季晨龙,等.汶川地震中砖石结构古塔的震害调查与分析[J].四川建筑科学研究,2012,38(6):156-159.PAN Yi,WANG Chao,JI Chenlong,et al. Investigation and analysis of seismic damage to ancient masonry pagodas during the wenchuan earthquake.[J]. Sichuan Building Science,2012,38(6):156-159.(in Chinese)
[3]魏俊平,张东平.砖石古塔动力特性研究[J].工程抗震与加固改造,2008,30(5):103-104.WEI Junping,ZHANG Dongping. Research on dynamic properties of ancient masonry pagodas[J]. Earthquake Resistant Engineering and Retrofitting,2008,30(5):103-104.(in Chinese)
[4]张文芳,田洲,李叶,等.晋祠舍利生生塔砖结构的地震破坏形态研究[J].工程抗震与加固改造,2011,33(3):7-12.ZHANG Wenfang,TIAN Zhou,LI Ye,et al. Research on earthquake failure configuration of the Shelishengsheng pagoda brick structure in Jinci temple[J]. Earthquake Resistant Engineering and Retrofitting,2011,33,(3):7-12.(in Chinese)
[5]邓志轩,陆伟东,刘杏杏,等.楼阁式错角筒砖塔结构性能分析研究[J].结构工程师,2016,32(2):60-63.DENG Zhixuan,LU Weidong,LIU Xingxing,et al. Research on the structure behavior of pavilion-type brick pagoda[J]. Structural Engineers,2016,32(2):60-63.(in Chinese)
[6]李胜才,DINAD'AYALA,呼梦洁.灌浆与钢箍加固震损砖墙的抗震性能试验研究[J].土木建筑与环境工程,2014,36(4):36-41.LI Shengcai,DINAD'AYALA,HU Mengjie,Experimental Investigation on the aseismic behavior of seismic damage masonry wall retrofitted with grouting and steel hoops[J]. Journal of Civil,Architectural&Environmental Engineering. 2014,36(4):36-41.(in Chinese)
[7]杜启明.登封嵩岳寺塔勘测简报[J].中原文物,1987,4:7-19.DU Qiming. Survey Bulletin of the pagoda in Songyue temple[J]. Cultural Relics of Central China,1987,4:7-19.(in Chinese)
[8]郭建邦.登封嵩岳寺塔天宫清理简报[J].文物,1992,1:26-27.GUO Jianbang,Cleaning Bulletin of the Tiangong of the pagoda in Songyue temple[J]. Cultural Relics,1992,1:26-27.(in Chinese)
[9]中华人民共和国住房和城乡建设部.砌体结构设计规范:GB50003-2011[S].北京:中国建筑工业出版社,2011.Ministry of Housing and Urban-Rural Development of the People's Republic of China. Code for design of masonry structures:GB50003-2011.[S]. Beijing. China Architecture&Building Press. 2010.(in Chinese)
[10]姚玲.砖石古塔动力特性建模技术的研究与应用[D].扬州:扬州大学,2003:23-32.YAO Ling. Research and application on modeling technology of dynamic behavior of the ancient masonry pagodas[D]. Yangzhou:Yangzhou University,2003:23-32.(in Chinese)
[11]魏仁杰,童丽萍.荥阳秦氏旧宅堂楼抗震性能研究[J].世界地震工程,2014(2):199-207.WEI Renjie,TONG Liping. Study on seismic performance of Qin's old dwelling in Xingyang[J]. World Earthquake Engineering,2014(2):199-207.(in Chinese)
[12] CERROLAZA M,SULEM J,ELBIED A. A cosserat non-linear finite element analysis software for blocky structures[J]. Advances in Engineering Software,1999,30(1):69-83.
[13]中华人民共和国住房和城乡建设部.建筑抗震设计规范:GB50011-2010[S].北京:中国建筑工业出版社. 2010.Ministry of Housing and Urban-Rural Development of the People's Republic of China. Code for seismic design of buildings:GB50011-2010.[S].Beijing. China Architecture&Building Press. 2010.(in Chinese)
[14]陈平,郭琦,张鹏丽.崇文塔震害分析及安全性评估[J].工业建筑,2015,45(2):65-68.CHEN Ping,GUO Qi,ZHANG Pengli. Analysis of seismic damage and evaluation on the safety of chongwen pagoda[J]. Industrial Construction,2015,45(2):65-68.(in Chinese)
[15]司建辉,李凯,卢俊龙,等.崇寿寺砖塔结构地震损伤数值分析[J].西安理工大学学报,2018,34(2):153-158.SI Jianhui,LI Kai,LU Junlong,et al. Numerical analysis of seismic damage of masonry pagoda in chongshousi temple[J]. Journal of Xi'an University of Technology,2018,34(2):153-158.(in Chinese)
[16]杨小卫,罗开海,王亚勇.古砖塔内植锚杆加固前后抗倒塌能力研究[J].工程抗震与加固改造,2018,40(2):102-107.YANG Xiaowei,LUO Kaihai,WANG Yayong. Study on the seismic collapse resistance ability of ancient brick pagoda unretrofitted and retrofitted with interplantation anchor technology[J]. Earthquake Resistant Engineering and Retrofitting,2018,40(2):102-107.(in Chinese)