非规则房屋结构隔震体系的计算方法与动力性能计算研究
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摘要
本文提出了适用于非规则布置房屋结构隔震体系计算的层单元模型。该模型主要有层间刚度、弹力半径、刚度偏心距等性能参数。这些性能参数的计算仅与本层结构的尺寸和材料有关。在模态分析的基础上,本文建立了平动扭转藕联房屋结构隔震体系的简化计算方法,该方法动力自由度、输入参数相对较少,能够适用于扭转非规则房屋结构隔震体系的实用设计计算。本文利用层单元性能参数,构造了考虑楼板变形的有限元层单元计算模型,同时建立了多层非规则布置房屋结构及其隔震体系的动静力计算方法。该方法与传统的上部结构计算方法的衔接很方便,计算过程层次分明,高效可靠,易于把握。另外在数值计算方面,本文提出了改进的wilson -θ法,谱分析和时程分析迭代法等等。
本文的计算分析说明,对于扭转非规则隔震体系,上部结构的性能参数对隔震体系的扭转效应有一定的影响,隔震层的性能参数对隔震体系的扭转效应有很大的影响。将隔震层刚度偏心距相对上部结构刚度偏心距反向设置可以进一步降低底部层间惯性扭矩。对于凹凸非规则隔震体系,上部结构的局部变形能够大幅减小,但凹凸部位隔震层底板变形较大。上部结构的性能参数和隔震层性能参数对底板变形有较大影响,将隔震层的刚度平面布置与上部结构刚度平面布置接近一致,可有效降低底板的变形。对于底部弱层非规则隔震体系,上部结构弱层的侧移和楼板变形能有效地降低。将隔震层的刚度平面布置与弱层刚度平面布置接近一致,仍可有效降低底板的变形。
The storey element mode for irregular isolated structure is suggested in this paper. The major performance parameters of the modal are floor stiffness, elasticity radius and eccentricity of stiffness. All of these performance parameters are only related to measure and material of the floor. On the base of modal analysis, simplified calculation method for lateral-torsional coupled isolated structure is established in this paper. This method has smaller dynamical freedom and parameter; it’s the same with practicality design and calculation of asymmetric lateral-torsional coupled isolated structure. The finite storey element mode with consideration of floor deformation and dynamic and static calculation method for irregular multiple-course construction and isolated-structure are established by using storey element performance parameters. This method is convenient joined with traditional calculation method, and its process is clearly, credibility and prone to grasp. On the side of numerical calculation, improved wilson -θmethod, response-spectrum analysis and time-history escalator method are suggested.
The calculation analysis of this paper shows that, performance parameter of superstructure has some influence on torsion-effect of isolated-structure, and performance parameter of isolated-layer has great influence. It can reduce more base inertia-torsion by setting eccentricity of isolated-layer reverse with eccentricity of superstructure. Local deformation can great reduce on concave-convex irregular isolated-structure, but deformation of soleplate on concave-convex part of isolated- layer is rather large. Performance parameter of superstructure and isolated- storey has great influence on deformation of soleplate. It can efficient reduce deformation of soleplate by making plane arrangement of isolated-stiffness accord with the super- structure. Sidesway and floor deformation of feebleness-storey on superstructure can efficient reduce in bottom feebleness- storey irregular isolated-structure. It also can reduce deformation of soleplate by making plane arrangement of isolated-stiffness accord with feebleness- storey.
本文的计算分析说明,对于扭转非规则隔震体系,上部结构的性能参数对隔震体系的扭转效应有一定的影响,隔震层的性能参数对隔震体系的扭转效应有很大的影响。将隔震层刚度偏心距相对上部结构刚度偏心距反向设置可以进一步降低底部层间惯性扭矩。对于凹凸非规则隔震体系,上部结构的局部变形能够大幅减小,但凹凸部位隔震层底板变形较大。上部结构的性能参数和隔震层性能参数对底板变形有较大影响,将隔震层的刚度平面布置与上部结构刚度平面布置接近一致,可有效降低底板的变形。对于底部弱层非规则隔震体系,上部结构弱层的侧移和楼板变形能有效地降低。将隔震层的刚度平面布置与弱层刚度平面布置接近一致,仍可有效降低底板的变形。
The storey element mode for irregular isolated structure is suggested in this paper. The major performance parameters of the modal are floor stiffness, elasticity radius and eccentricity of stiffness. All of these performance parameters are only related to measure and material of the floor. On the base of modal analysis, simplified calculation method for lateral-torsional coupled isolated structure is established in this paper. This method has smaller dynamical freedom and parameter; it’s the same with practicality design and calculation of asymmetric lateral-torsional coupled isolated structure. The finite storey element mode with consideration of floor deformation and dynamic and static calculation method for irregular multiple-course construction and isolated-structure are established by using storey element performance parameters. This method is convenient joined with traditional calculation method, and its process is clearly, credibility and prone to grasp. On the side of numerical calculation, improved wilson -θmethod, response-spectrum analysis and time-history escalator method are suggested.
The calculation analysis of this paper shows that, performance parameter of superstructure has some influence on torsion-effect of isolated-structure, and performance parameter of isolated-layer has great influence. It can reduce more base inertia-torsion by setting eccentricity of isolated-layer reverse with eccentricity of superstructure. Local deformation can great reduce on concave-convex irregular isolated-structure, but deformation of soleplate on concave-convex part of isolated- layer is rather large. Performance parameter of superstructure and isolated- storey has great influence on deformation of soleplate. It can efficient reduce deformation of soleplate by making plane arrangement of isolated-stiffness accord with the super- structure. Sidesway and floor deformation of feebleness-storey on superstructure can efficient reduce in bottom feebleness- storey irregular isolated-structure. It also can reduce deformation of soleplate by making plane arrangement of isolated-stiffness accord with feebleness- storey.
引文
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[4] 肖 登 奎 , 戴 朝 晖 . 建 筑 结 构 基 础 隔 震 技 术 的 发 展 [J].建 筑 技 术 开 发 , 2002,29(5):1-2.
[5] 日本免震构造协会编,叶列平译.图解隔震结构入门[M].北京:科学出版社,1998.
[6] 徐忠根,周福霖,丘湘泉.汕头博物馆结构动力分析[J].世界地震工程, 1996,5:33-36.
[7] 冼巧玲,周福霖,王伟.橡胶垫隔震框架结构试验研究[J].世界地震工程, 1996,5:23-28.
[8] 杨佑发,周福霖.隔震结构地震反应分析的实用计算方法[J].世界地震工程, 2000,16(1):72-76.
[9] 徐忠根,周福霖.我国首栋橡胶垫隔震住宅楼动力分析[J].世界地震工程, 1996,2:38-42.
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[11] 裴若娟,唐家祥.叠层橡胶隔震器的耐久性[J].工程抗震,1993,3:36-39.
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[13] 唐家祥,李黎.叠层橡胶基础隔震房屋结构设计与研究[J].建筑结构学报,1996,17(2):37-47.
[14] 周锡元,韩淼,曾德民,马东辉.组合橡胶支座及橡胶支座与柱串联系统的水平刚度计算方法 [J].地震工程与工程振动,1999,19(4):68-75.
[15] 周锡元,韩淼等.橡胶支座柱串联隔震系统水平刚度系数[J].振动工程学报,1999,12(2):157-165.
[16] 周锡元,韩淼,曾德民,樊水荣.具有软着陆保护的橡胶支座隔震体系[J].建筑结构学报,2000,21(5):2-10.
[17] JIANG Yi-cheng, TANG Jia-xiang, XIONG Shi-shu, ZHAO Wen-guang. Base-isolation Technology in China [J].岩土力学,2001,22(4):409-503.
[18] 苏经宇,韩淼,周锡元,曾德民.橡胶支座基础隔震建筑地震作用实用计算方法[J].振动工程学报,1999,12(2):229-236.
[19] 朱 涛 . 某 图 书 馆 基 础 隔 震 体 系 的 地 震 反 应 分 析 [J]. 建 筑 技 术 开 发 ,2003,30(8):30-31.
[20] 苏范榕,陈华明,刘伟庆.住宅楼基础隔震设计应用实例[J].重庆建筑大学学报,2004,26(6):116-119.
[21] 唐家祥.我国第一个隔震建筑的设计规范[J].建筑结构,2002,32(1):67-70.
[22] 建筑抗震设计规范(GB50011-2001)[S].北京:中国建筑工业出版社,2001.
[23] 高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2002.
[24] Nagarajaiah, S.,Reinhorn A. M. and Constantinou M .C. . Torsional Coupling in Sliding Base Isolated Structures[J]. J. Struct. Engrg., 1993,119:130-149.
[25] Nagarajaiah, S.,Reinhorn A. M. and Constantinou M .C. . Nonlinear dynam is analysis 3-D base isolated structures[J]. J. Struct. Engrg., 1991,117: 2035-2054.
[26] Nagarajaiah, S,et al. Torsion in base-isolated structures with elastomeric isolation systems[J].J. Struct. Engrg., 1993,119(12):2932-2951.
[27] Nagarajaiah, S. and Narasimhan, S. (2004a). “Phase I: Controllers for benchmark base isolated building: Part I.” Proc. 4th Int. Workshop on Structural Control and Health Monitoring, Columbia University, Jun 10-11, 2004.
[28] Nagarajaiah, S. and Narasimhan, S. (2004b). “Phase I smart base isolated benchmark building - sample controllers for linear isolation system: Part II.” J. of Structural Control and Health Monitoring (in review).
[29] Nagarajaiah, S. and Narasimhan, S. (2004c). “Phase II: Controllers for benchmark base isolated building with friction isolation system: Part IV.” J. of Structural Control and Health Monitoring (in preparation).
[30] Dong-Guen Lee, Hyun-Su Kim, Min Hah Chun. Efficient seismic analysis of high-rise building structures with the effects of floor slabs[J].Engineering Structures,2002,24:613-623.
[31] H.-S. Kim, D.-G. Lee. Efficient analysis of slab structure subjected to lateral loads[J].Engineering Structures,2005,27:251-263.
[32] Dong-Guen Lee, Sang-Kyoung Ahn, Dae-Kon Kim. Efficient seismic analysis of building structure including floor slab[J].Engineering Structures ,2005,27:675-68.
[33] 童申家.弹性楼板的框架—剪力墙结构动力分析[J].西安建筑科技大学学报,1997,29(1):74-78.
[34] 黄德健,童申家.考虑楼板弯曲变形的框架—剪力墙结构地震分析[J].西安建筑科技大学学报(自然科学版),2002,34(1):57-60.
[35] 童申家,姚伟军.高层框架结构的空间整体地震作用分析[J].工程抗震,2004,1:14-17.
[36] 赵西安.高层建筑结构考虑楼板的直接动力分析[J].计算结构力学及其应用,1990,7(4):32-39.
[37] 史庆轩,王社良.考虑楼板变形影响底层框架抗震墙砖混结构的地震反应分析[J].结构工程师,2000,3:31-35.
[38] 包世华,剧锦三,张亿果.变截面高层建筑结构考虑楼板变形时的二阶分析[J].建筑结构,1999,2:3-7.
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