隔震建筑抗超大震性能分析与设计
发布时间：2019-01-26 18:35
【摘要】：隔震技术是50年来结构抗震领域突出的研究成果。近年来,高层建筑结构成为未来的发展趋势,高层隔震技术也在我国得到广泛的应用。近几年国内发生过数起9度以上的特大地震,而隔震建筑的实际设防烈度通常小于9度,在设计基准期内可能承受超出设计1度左右的地震作用,即超大震作用。隔震措施可以使上部结构在大震作用下处于弹性或弱非线性状态,减小上部结构的地震响应,然而在大震、特别在超大震作用下隔震层位移、结构整体的抗倾覆安全都需要特别研究。本文通过SAP2000和ETABS软件建立隔震结构有限元模型并进行动力弹塑性时程分析,重点研究基于“大震不倒”设计的隔震结构的抗超大震性能、实现抗超大震的代价和对应设计方法,主要完成以下内容:(1)按8度设防分别设计高度为27m、53m和95m的隔震结构,通过SAP2000和ETABS软件对这三个隔震结构进行建模,采用弹塑性时程分析对结构在地震峰值加速度(PGA)为70gal、220gal、310gal、400gal、510gal、620gal等地震下的动力响应进行计算;通过比较三个结构的层间位移角、隔震支座位移及结构倾覆力矩等响应,判断结构在超大震下是否倒塌、倒塌模式及临界PGA,得到隔震结构的抗超大震能力。(2)通过提高设计安全系数的方式增加结构的抗超大震能力。为提高隔震结构的抗超大震能力并同时保证不额外付出过大代价,对前文所选结构隔震层进行改进设计,在不改变支座个数及支座布置的基础上,通过扩大支座截面的方式保证隔震结构能够承受超大震的作用,并对改进后的结构层间位移角、隔震支座位移、结构倾覆力矩进行分析,得到超大震下新的结构的破坏模式和临界PGA,并给出满足“超大震不倒”设计下安全系数的选取建议以及前后两种方案结构各参数的对比;此外,分析基础隔震结构的适用条件,得出其具有一定局限性。(3)通过增加隔震结构的柱截面尺寸的方式减小上部结构的层间变形,对6层隔震结构采用该措施设计并分析其抗震性能,通过对比得出扩大上部结构层间刚度的作用;通过在隔震层增加粘滞阻尼器的方式增加隔震结构的抗震性能,对17层隔震结构在隔震层设计粘滞阻尼器并分析新的结构地震下响应,通过对比判断粘滞阻尼器的作用。
[Abstract]:Isolation technology is the outstanding research result in the field of earthquake resistance of structures in the past 50 years. In recent years, high-rise building structure has become the development trend in the future, high-rise isolation technology has been widely used in China. In recent years, there have been several large earthquakes of more than 9 degrees in China, but the actual fortification intensity of isolated buildings is usually less than 9 degrees. The isolation measures can make the superstructure in elastic or weakly nonlinear state under the action of a large earthquake, and reduce the seismic response of the superstructure. However, in the case of a large earthquake, especially under the action of a very large earthquake, the displacement of the isolated layer can be reduced. The overturning safety of the whole structure needs special study. In this paper, the finite element model of isolated structure is established by SAP2000 and ETABS software, and the dynamic elastic-plastic time-history analysis is carried out. The performance of the isolated structure based on the design of "strong earthquake is not inverted" is studied, and the cost and corresponding design method of anti-earthquake are realized. The main contents are as follows: (1) the isolation structures with the height of 27m ~ 53m and 95m are designed according to the 8-degree fortification, and the three isolation structures are modeled by SAP2000 and ETABS software. Elastoplastic time-history analysis is used to calculate the dynamic response of the structure under the earthquake with a peak acceleration of 70gal-220gal-310gal-310gal-400-gal-510gal-620gal. By comparing the interstory displacement angle of three structures, the displacement of isolation support and the overturning moment of the structure, the collapse mode and the critical PGA, of the structure under the super large earthquake are determined. The super-large earthquake resistance of isolated structures is obtained. (2) by increasing the design safety factor, the anti-super-large earthquake resistance of the structures is increased. In order to improve the seismic resistance of the isolated structure and ensure that it does not pay too much extra cost, the design of the isolation layer is improved without changing the number of the bearings and the arrangement of the bearings. By expanding the bearing section to ensure that the isolated structure can withstand the action of super large earthquakes, the improved interstory displacement angle of the structure, the displacement of the isolation support, and the overturning moment of the structure are analyzed. The failure mode and the critical PGA, of the new structure under the super large earthquake are obtained, and the suggestion of selecting the safety factor under the design of "large earthquake is not collapsed" and the comparison of the structural parameters between the two schemes before and after are given. In addition, by analyzing the applicable conditions of base-isolated structures, it is concluded that they have certain limitations. (3) the interstory deformation of superstructures is reduced by increasing the column section size of the isolated structures. This method is used to design and analyze the aseismic performance of 6-story isolated structure, and the function of enlarging the stiffness of superstructure is obtained by comparison. By adding viscous dampers to the isolation layer to increase the seismic performance of the isolated structure, the paper designs a viscous damper for the 17 story isolated structure and analyzes the response of the new structure under the earthquake. The effect of the viscous damper is judged by comparing the effect of the viscous damper.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.12
本文编号：2415776
[Abstract]:Isolation technology is the outstanding research result in the field of earthquake resistance of structures in the past 50 years. In recent years, high-rise building structure has become the development trend in the future, high-rise isolation technology has been widely used in China. In recent years, there have been several large earthquakes of more than 9 degrees in China, but the actual fortification intensity of isolated buildings is usually less than 9 degrees. The isolation measures can make the superstructure in elastic or weakly nonlinear state under the action of a large earthquake, and reduce the seismic response of the superstructure. However, in the case of a large earthquake, especially under the action of a very large earthquake, the displacement of the isolated layer can be reduced. The overturning safety of the whole structure needs special study. In this paper, the finite element model of isolated structure is established by SAP2000 and ETABS software, and the dynamic elastic-plastic time-history analysis is carried out. The performance of the isolated structure based on the design of "strong earthquake is not inverted" is studied, and the cost and corresponding design method of anti-earthquake are realized. The main contents are as follows: (1) the isolation structures with the height of 27m ~ 53m and 95m are designed according to the 8-degree fortification, and the three isolation structures are modeled by SAP2000 and ETABS software. Elastoplastic time-history analysis is used to calculate the dynamic response of the structure under the earthquake with a peak acceleration of 70gal-220gal-310gal-310gal-400-gal-510gal-620gal. By comparing the interstory displacement angle of three structures, the displacement of isolation support and the overturning moment of the structure, the collapse mode and the critical PGA, of the structure under the super large earthquake are determined. The super-large earthquake resistance of isolated structures is obtained. (2) by increasing the design safety factor, the anti-super-large earthquake resistance of the structures is increased. In order to improve the seismic resistance of the isolated structure and ensure that it does not pay too much extra cost, the design of the isolation layer is improved without changing the number of the bearings and the arrangement of the bearings. By expanding the bearing section to ensure that the isolated structure can withstand the action of super large earthquakes, the improved interstory displacement angle of the structure, the displacement of the isolation support, and the overturning moment of the structure are analyzed. The failure mode and the critical PGA, of the new structure under the super large earthquake are obtained, and the suggestion of selecting the safety factor under the design of "large earthquake is not collapsed" and the comparison of the structural parameters between the two schemes before and after are given. In addition, by analyzing the applicable conditions of base-isolated structures, it is concluded that they have certain limitations. (3) the interstory deformation of superstructures is reduced by increasing the column section size of the isolated structures. This method is used to design and analyze the aseismic performance of 6-story isolated structure, and the function of enlarging the stiffness of superstructure is obtained by comparison. By adding viscous dampers to the isolation layer to increase the seismic performance of the isolated structure, the paper designs a viscous damper for the 17 story isolated structure and analyzes the response of the new structure under the earthquake. The effect of the viscous damper is judged by comparing the effect of the viscous damper.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.12
【参考文献】
中国期刊全文数据库 前9条
1 刘文光,周福霖,庄学真,冯德民,三山刚史,加藤泰正;铅芯夹层橡胶隔震垫基本力学性能研究[J];地震工程与工程振动;1999年01期
2 孟庆利,张敏政,陈栋;一种新型混合控制技术的振动台模型试验研究[J];地震工程与工程振动;2004年02期
3 苏键;温留汉·黑沙;周福霖;;隔震层竖向刚度对高层基础隔震结构的影响[J];地震工程与工程振动;2010年03期
4 商昊江;祁皑;范宏伟;;高层隔震结构等效模型研究[J];福州大学学报(自然科学版);2011年01期
5 何永超,邓长根,曾康康;日本高层建筑基础隔震技术的开发和应用[J];工业建筑;2002年05期
6 刘海卿;杨海东;;强震下智能隔震支座研制及恢复力分析[J];辽宁工程技术大学学报(自然科学版);2015年03期
7 胥玉祥;朱玉华;卢文胜;;云南省博物馆新馆隔震结构模拟地震振动台试验研究[J];建筑结构学报;2011年10期
8 唐家祥，李黎，李英杰，董彦哲;叠层橡胶基础隔震房屋结构设计与研究[J];建筑结构学报;1996年02期
9 王曙光;杜东升;刘伟庆;;高层建筑结构隔震设计关键问题[J];南京工业大学学报(自然科学版);2009年01期
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