单层平面索网玻璃幕墙结构地震反应分析
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摘要
单层平面索网玻璃幕墙结构作为一种新型结构形式,以建筑造型美观,构件轻巧纤细,广泛应用于大型公共建筑中,其具有柔性大、阻尼小等特点。作为一种新型结构形式,目前对其地震反应特点和抗震原则缺乏了解。在采用振型分解反应谱法进行单层平面索网结构抗震设计时,会有多阶振型参与结构振动,高阶振型可能也需要考虑,这就需要给出一个选择主要贡献模态的判断标准。此外,单层平面索网玻璃幕墙由脆性材料的玻璃面板和没有明显的屈服台阶和强化阶段的索组成,目前我国抗震规范给出的三水准两阶段的抗震设计对其可能并不适用,需要对其抗震设计原则进行进一步的探讨。
As a new kind of glazing system,cable net facade is widely used with many advantages,such as pleasing aesthetics,easy constructability and so on.Moreover,it has the characteristics of weak stiffness,light weight,small damping.As a new structure,we knew little about the seismic response characteristics and seismic design principals of cable net fa ade.When mode decomposition response spectrum method was used to the seismic response analysis of cable net fa ade,high modes may have contribution on the seismic response of cable net fa ade.While no generally accepted method or conclusion exists regarding the necessary number of modes required for such analysis at present,so the proper accepted method and conclusion need to be studied.Since cable net facade consists of the brittle glass panels and the cable without obvious yielding stress,the seismic design principals in code for seismic design of building(2008) may not be applicable,and the new seismic design principals for cable net fa ade were needed.
As a new kind of glazing system,cable net facade is widely used with many advantages,such as pleasing aesthetics,easy constructability and so on.Moreover,it has the characteristics of weak stiffness,light weight,small damping.As a new structure,we knew little about the seismic response characteristics and seismic design principals of cable net fa ade.When mode decomposition response spectrum method was used to the seismic response analysis of cable net fa ade,high modes may have contribution on the seismic response of cable net fa ade.While no generally accepted method or conclusion exists regarding the necessary number of modes required for such analysis at present,so the proper accepted method and conclusion need to be studied.Since cable net facade consists of the brittle glass panels and the cable without obvious yielding stress,the seismic design principals in code for seismic design of building(2008) may not be applicable,and the new seismic design principals for cable net fa ade were needed.
引文
[1]Schlaich J,Schober H,Moschner T.Prestressed cablenet facades[J.]Structural Engineering International.2005,15(1):36-39
[2]Feng Ruoqiang,Zhang Linlin,Wu Yue,et al.Dynamicperformance ofcable net facades[J.]Journal of ConstructionalSteel Research,2009,65(12):2217-2227
[3]Qin Q,Li Y.Seismic design of nonstructural componentsand equipment in tall buildings[C/]/Proceedings of the 5thInternational Conference on Tall Buildings.Hong Kong,1998:855-860
[4]FengRuoqiang,Wu Yue,Shen Shizhao.Working mechanismof single-layer cable net supported glass curtain walls[J].International Journal of Advances in Structural Engineering,2007,10(2):183-195
[5]Feng Ruoqiang,Wu Yue,Shen Shizhao.Dynamic performa-nce of cable net facade under earthquake[J.]Journal ofHarbin institute of Technology,2010,17(3):313-317
[6]Wilson E L,Yuan Mingwu,Dickens J M.Dynamic analysisby direct superposition of ritz vectors[J.]EarthquakeEngineering and Structural Dynamics,1982,10:813-821
[7]Joo K J,Wilson E L,Leger P.Ritz vectors and generationcriteria for mode superposition analysis[J.]EarthquakeEngineering and Structural Dynamics,1987,18:149-167
[8]Gu Jianmin,Ma Z D,Hulbert G M.A new load-dependentRitz vector method for structural dynamics analyses:quasi-static Ritz vectors[J.]Finite Elements in Analysis andDesign,2000,36(3/4):261-278
[9]冯若强.单层平面索网玻璃幕墙结构静动力性能研究[D].哈尔滨:哈尔滨工业大学,2006
[10]秦权,聂宇.非结构构件和设备的抗震设计和简化计算方法[J.]建筑结构学报.2001,22(3):15-20(QinQuan,Nie Yu.Seismic design and simplified analyticalmethod of nonstructural components and equipment inbuildings[J.]Journal of Building Strutures,2001,22(3):15-20(in Chinese))
[2]Feng Ruoqiang,Zhang Linlin,Wu Yue,et al.Dynamicperformance ofcable net facades[J.]Journal of ConstructionalSteel Research,2009,65(12):2217-2227
[3]Qin Q,Li Y.Seismic design of nonstructural componentsand equipment in tall buildings[C/]/Proceedings of the 5thInternational Conference on Tall Buildings.Hong Kong,1998:855-860
[4]FengRuoqiang,Wu Yue,Shen Shizhao.Working mechanismof single-layer cable net supported glass curtain walls[J].International Journal of Advances in Structural Engineering,2007,10(2):183-195
[5]Feng Ruoqiang,Wu Yue,Shen Shizhao.Dynamic performa-nce of cable net facade under earthquake[J.]Journal ofHarbin institute of Technology,2010,17(3):313-317
[6]Wilson E L,Yuan Mingwu,Dickens J M.Dynamic analysisby direct superposition of ritz vectors[J.]EarthquakeEngineering and Structural Dynamics,1982,10:813-821
[7]Joo K J,Wilson E L,Leger P.Ritz vectors and generationcriteria for mode superposition analysis[J.]EarthquakeEngineering and Structural Dynamics,1987,18:149-167
[8]Gu Jianmin,Ma Z D,Hulbert G M.A new load-dependentRitz vector method for structural dynamics analyses:quasi-static Ritz vectors[J.]Finite Elements in Analysis andDesign,2000,36(3/4):261-278
[9]冯若强.单层平面索网玻璃幕墙结构静动力性能研究[D].哈尔滨:哈尔滨工业大学,2006
[10]秦权,聂宇.非结构构件和设备的抗震设计和简化计算方法[J.]建筑结构学报.2001,22(3):15-20(QinQuan,Nie Yu.Seismic design and simplified analyticalmethod of nonstructural components and equipment inbuildings[J.]Journal of Building Strutures,2001,22(3):15-20(in Chinese))
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