砖石古塔抗震性能评估方法及抗震加固措施研究
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摘要
为了提高砖石古塔的抗震性能,针对其地震反应特点,研究了砖石古塔的抗震薄弱部位、抗震性能评估方法、评价指标以及抗震加固措施。主要研究结论为:(1)提出了采用极限承载能力与层间位移角2个指标综合评估砖石古塔的抗震性能,并通过工程实例验证了该方法的有效性。(2)提出了对穿锚杆锁定内外钢带围箍和竖向贯穿钢筋为主,聚丙烯酸脂乳液砂浆裂缝注浆为辅的砖石古塔综合抗震加固措施。(3)砖石古塔塔底截面为承载能力抗震薄弱部位,抗拉能力不足是导致塔体破坏的主要原因。(4)地震作用下,砖石古塔随着塔体层数的增加,层间位移角增大,顶层塔体为变形能力薄弱部位。该研究结果可为砖石古塔的抗震性能评估与抗震加固提供参考。
In order to enhance the seismic performance of masonry pagoda,seismic weak position,seismic performance evaluation method,evaluation index and seismic strengthening measures of masonry pagoda are studied according to its seismic response characteristics. The conclusions include:( 1) This paper presents a comprehensive evaluation of seismic performance of masonry pagoda based on two indexes which is the ultimate bearing capacity and inter-story displacement ratio,and the effectiveness of the method is verified by using an engineering example;( 2) This paper presents the comprehensive seismic strengthening measures for masonry pagodas,which is mainly composed of the inner and outer steel band hoops and the vertical penetrating steel bars,and the grouting of the acrylic acid emulsion mortar;( 3) The bottom cross-section of masonry pagoda is the weak part of the bearing capacity,and the insufficient tensile capacity is the main reason for failure of the pagoda;( 4) Under the action of earthquake,the inter-story displacement ratio increases with the increase of the pagoda story number,and the top of the pagoda is the weak part of the deformation. The results can provide a reference for the seismic performance evaluation method and strengthening measures for masonry pagodas.
In order to enhance the seismic performance of masonry pagoda,seismic weak position,seismic performance evaluation method,evaluation index and seismic strengthening measures of masonry pagoda are studied according to its seismic response characteristics. The conclusions include:( 1) This paper presents a comprehensive evaluation of seismic performance of masonry pagoda based on two indexes which is the ultimate bearing capacity and inter-story displacement ratio,and the effectiveness of the method is verified by using an engineering example;( 2) This paper presents the comprehensive seismic strengthening measures for masonry pagodas,which is mainly composed of the inner and outer steel band hoops and the vertical penetrating steel bars,and the grouting of the acrylic acid emulsion mortar;( 3) The bottom cross-section of masonry pagoda is the weak part of the bearing capacity,and the insufficient tensile capacity is the main reason for failure of the pagoda;( 4) Under the action of earthquake,the inter-story displacement ratio increases with the increase of the pagoda story number,and the top of the pagoda is the weak part of the deformation. The results can provide a reference for the seismic performance evaluation method and strengthening measures for masonry pagodas.
引文
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[5]陈平,贠作义,宋泽维,等.砖石古塔地震易损性评估[J].工程抗震与加固改造,2013,35(6):59-63.CHEN Ping,YUN Zuoyi,SONG Zewei,et al. Seismic vulnerability assessment of ancient masonry tower[J]. Earthquake Resistant Engineering and Retrofitting,2013,35(6):59-63.(in Chinese)
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[8]芦苇,赵冬,王玉兰.基础刚度对砖石古塔地震响应影响研究[J].地震工程学报,2016,38(4):498-503.LU Wei,ZHAO Dong,WANG Yulan. Impact of foundation stiffness on the seismic response of ancient masonry pagoda[J]. China Earthquake Engineering Journal,2016,38(4):498-503.(in Chinese)
[9]孔德刚,胡明珠,肖碧.砖石古塔抗震性能计算[J].铁道工程学报,2011,33(增刊):424-428.KONG Degang,HU Mingzhu,XIAO Bi. Calculation of earthquake resistance capacity for masonry pagoda[J]. Northwestern Seismological Journal,2011,33(Supp.):424-428.(in Chinese)
[10]袁建力,李胜才,刘大奇,等.砖石古塔抗震鉴定方法的研究与应用[J].扬州大学学报(自然科学版),1999,2(3):54-58.YUAN Jianli,LI Shengcai,LIU Daqi,et al. Research on and application of seismic appraisal method for ancient masonry pagodas[J]. Journal of Yangzhou University(Natural Science Edition),1999,2(3):54-58.(in Chinese)
[11]张文明.砖石古塔的抗震性能评估及地震破坏机理研究[D].西安:西安建筑科技大学,2008.ZHANG Wenming. Study on aseismic behavior evaluation and seismic broken mechanics of ancient masonry pagodas[D]Xi’an:Xi’an University of Architecture and Technology,2008.(in Chinese)
[12] GB50003-2011,砌体结构设计规范[S].北京:中国建筑出版社,2011.GB50003-2011 Code for Design of Masonry Structures[S]. China Building Press,2011.(in Chinese)
[2]陈平,陈厚飞,魏俊亚.大雁塔震害调查及有限元模拟分析[J].昆明理工大学学报,2010,35(2):37-41.CHEN Ping,CHEN Houfei,WEI Junya. Investigation nad finite element analysis of earthquake damage on Big Wild Goose pagoda[J]. Journal of Kunming University of Science and Technology,,2010,35(2):37-41.(in Chinese)
[3]李德虎,何江.砖石古塔动力特性的试验研究[J].工程抗震,1990,(3):34-36.LI Dehu,HE Jiang. Experimental study on dynamic properties of masonry in Guta[J]. Earthquake Resistant Engineering,1990,(3):34-36.(in Chinese)
[4]张永亮,宁贵霞,赵成江.砖石古塔弹性地震反应分析方法研究[J].兰州交通大学学报,2017,36(1):1-4.ZHANG Yongliang,NING Guixia,ZHAO Chengjiang. Research on analysis method of elastic seismic response for masonry pagoda[J]. Journal of Lanzhou Jiaotong University,2017,36(1):1-4.(in Chinese)
[5]陈平,贠作义,宋泽维,等.砖石古塔地震易损性评估[J].工程抗震与加固改造,2013,35(6):59-63.CHEN Ping,YUN Zuoyi,SONG Zewei,et al. Seismic vulnerability assessment of ancient masonry tower[J]. Earthquake Resistant Engineering and Retrofitting,2013,35(6):59-63.(in Chinese)
[6]卢俊龙.实心砖石古塔动力特性与结构损伤分析[J].力学与实践,2016,38(5):560-566.LU Junlong. Damage and dynamic characteristics analysis of a solid structure pagoda[J]. Mechanics in Engineering,2016,38(5):560-566.(in Chinese)
[7]尹力峰,唐丽华,刘志坚,等.吐鲁番苏公塔的抗震性能初步分析[J].世界地震工程,2013,19(4):145-153.YIN Lifeng,TANG Lihua,LIU Zhijian,et al. Study on seismic behavior of Emin Minaret in Turpan region[J]. World Earthquake Engineering,2013,19(4):145-153.(in Chinese)
[8]芦苇,赵冬,王玉兰.基础刚度对砖石古塔地震响应影响研究[J].地震工程学报,2016,38(4):498-503.LU Wei,ZHAO Dong,WANG Yulan. Impact of foundation stiffness on the seismic response of ancient masonry pagoda[J]. China Earthquake Engineering Journal,2016,38(4):498-503.(in Chinese)
[9]孔德刚,胡明珠,肖碧.砖石古塔抗震性能计算[J].铁道工程学报,2011,33(增刊):424-428.KONG Degang,HU Mingzhu,XIAO Bi. Calculation of earthquake resistance capacity for masonry pagoda[J]. Northwestern Seismological Journal,2011,33(Supp.):424-428.(in Chinese)
[10]袁建力,李胜才,刘大奇,等.砖石古塔抗震鉴定方法的研究与应用[J].扬州大学学报(自然科学版),1999,2(3):54-58.YUAN Jianli,LI Shengcai,LIU Daqi,et al. Research on and application of seismic appraisal method for ancient masonry pagodas[J]. Journal of Yangzhou University(Natural Science Edition),1999,2(3):54-58.(in Chinese)
[11]张文明.砖石古塔的抗震性能评估及地震破坏机理研究[D].西安:西安建筑科技大学,2008.ZHANG Wenming. Study on aseismic behavior evaluation and seismic broken mechanics of ancient masonry pagodas[D]Xi’an:Xi’an University of Architecture and Technology,2008.(in Chinese)
[12] GB50003-2011,砌体结构设计规范[S].北京:中国建筑出版社,2011.GB50003-2011 Code for Design of Masonry Structures[S]. China Building Press,2011.(in Chinese)