单层柱面网壳风致动力失效特征及简化分析
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摘要
为简化网壳结构在风荷载下的弹塑性动力失效分析过程,提出了基于动力失效的等效静力风荷载的简化计算方法,使网壳结构的抗风设计同时满足强度和稳定性的要求.通过对单层柱面网壳结构进行风荷载下的静力、动力失效全过程分析,给出了综合Budiansky-Roth准则和Hsu S C准则的动力失效判别方法,以准确、有效地确定网壳结构的动力失效临界荷载系数.结合概念分析和定量计算,指出了风荷载下网壳结构的动力失效模式包括弹性动力失稳破坏、弹塑性动力失稳破坏和塑性动力强度破坏.对比网壳结构的静力、动力失效临界荷载系数,确定了基于动力失效的等效静力风荷载系数,可为网壳结构抗风设计提供参考.
In order to simplify the elastoplastic dynamic failure analysis of reticulated shell structures under wind load, a simplified calculation method of equivalent static wind load based on dynamic failure is proposed. The strength and stability requirements can be met during the wind-resistant design of reticulated shells. Using the analysis of the static and dynamic failure of reticulated shells under wind load, the critical load factor of dynamic failure of reticulated shells is accurately determined by the method of dynamic failure judgment based on the combination of Budiansky-Roth criterion and Hsu S C criterion. Combined with concept analysis and quantitative calculation, the dynamic failure modes of reticulated shell structures under wind load are pointed out simply and quickly, including elastic dynamic instability failure, elastoplastic dynamic instability failure and plastic dynamic strength failure. By comparing the static and dynamic failure critical load factor of reticulated shells, the equivalent static wind load based on dynamic failure is determined, which can be used as a reference for wind-resistant design of reticulated shell structures.
In order to simplify the elastoplastic dynamic failure analysis of reticulated shell structures under wind load, a simplified calculation method of equivalent static wind load based on dynamic failure is proposed. The strength and stability requirements can be met during the wind-resistant design of reticulated shells. Using the analysis of the static and dynamic failure of reticulated shells under wind load, the critical load factor of dynamic failure of reticulated shells is accurately determined by the method of dynamic failure judgment based on the combination of Budiansky-Roth criterion and Hsu S C criterion. Combined with concept analysis and quantitative calculation, the dynamic failure modes of reticulated shell structures under wind load are pointed out simply and quickly, including elastic dynamic instability failure, elastoplastic dynamic instability failure and plastic dynamic strength failure. By comparing the static and dynamic failure critical load factor of reticulated shells, the equivalent static wind load based on dynamic failure is determined, which can be used as a reference for wind-resistant design of reticulated shell structures.
引文
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[14] 顾明,周晅毅.大跨度屋盖结构等效静力风荷载方法及应用[J].建筑结构学报,2007,28(1):125-129.GU Ming,ZHOU Xuan-yi.Equivalent static wind loads of large-span roof structures [J].Journal of Building Structures,2007,28(1):125-129.
[15] BUDIANSKY B,ROTH R S.Axisymmetric dynamic buckling of clamped shallow spherical shells [C]// Collected Papers on Instability of Shells Structures,NASA TND-1510,Washington D C,1962:597-606.
[16] HSU C S.On dynamic stability of elastic bodies with prescribed initial condition [J].International Journal of Engineering Science,1966,4(1):1-21.
[2] 周岱,舒新玲,周笠人.大跨空间结构风振响应及其计算与试验方法[J].振动与冲击,2002,21(4):9-14.ZHOU Dai,SHU Xin-ling,ZHOU Li-ren.Wind-induced dynamic responses of long-span spatial structures and their computational and experimental methods [J].Journal of Vibration and Shock,2002,21(4):9-14.
[3] LI Yuan-qi,TAMURA Y.Wind-resistant analysis for large-span single-layer reticulated shells [J].International Journal of Space Structures,2004,19(1):47-59.
[4] LI Yuan-qi,TAMURA Y.Nonlinear dynamic analysis for large-span single-layer reticulated shells subjected wind loading [J].Wind and Structures,2005,8(1):35-48.
[5] UEMATSU Y,YAMADA M,INOUE A,et al.Wind loads and wind-induced dynamic behavior of a single-layer latticed dome [J].Journal of Wind Engineering and Industrial Aerodynamics,1997,66(3):227-248.
[6] 黄友钦,顾明.风荷载下单层柱面网壳的动力稳定[J].振动与冲击,2011,30(2):39-43.HUANG You-qin,GU Ming.Dynamic instability of a single-layer cylindrical reticulated shell under wind loads [J].Journal of Vibration and Shock,2011,30(2):39-43.
[7] 喻莹,王继中,朱兴一.基于有限质点法的双层柱面网壳强风作用下倒塌破坏研究[J].东南大学学报,2015,45(4):756-762.YU Ying,WANG Ji-zhong,ZHU Xing-yi.Collapse analysis of double-layer cylindrical reticulated shell under strong wind based on finite particle method [J].Journal of Southeast University,2015,45(4):756-762.
[8] 王军林,李红梅,郭华,等.风荷载下单层柱面网壳弹塑性动力失效破坏有限元分析[J].空间结构,2013,9(4):40-46.WANG Jun-lin,LI Hong-mei,GUO Hua,et al.Finite element analysis of elastic-plastic dynamic failure of single-layer cylindrical reticulated shell structures under wind loads [J].Spatial Structures,2013,19(4):40-46.
[9] WANG Jun-lin,LI Hong-mei,GUO Hua,et al.Wind induced bucking analysis of single layer lattice domes [C]// Proceedings of Asia-Pacific Conference on Shell and Spatial Structures,Seoul,2012:126-131.
[10] LI Yuan-qi,TAMURA Y.Equivalent static wind load estimation in wind-resistant design of single-layer reticulated shells [J].Wind and Structures,2005,8(6):443-454.
[11] LI Yuan-qi,TAMURA Y,YOSHIDA A,et al.Wind loading and its effects on single-layer reticulated cylindrical shells [J].Journal of Wind Engineering and Industrial Aerodynamics,2006,94(12):949-973.
[12] UEMATSU Y,SONE T,YAMADA M,et al.Wind-induced dynamic response and its load estimation for structural frames of single-layer latticed domes with long spans[J].Wind and Structures,2002,5(6):543-562.
[13] 黄友钦,顾明,周晅毅.以动力稳定为目标的空间结构等效静力风荷载[J].同济大学学报(自然科学版),2011,39(5):637-642.HUANG You-qin,GU Ming,ZHOU Xuan-yi.Dynamic-instability-based equivalent static wind loads on spatial structures [J].Journal of Tongji University,2011,39(5):637-642.
[14] 顾明,周晅毅.大跨度屋盖结构等效静力风荷载方法及应用[J].建筑结构学报,2007,28(1):125-129.GU Ming,ZHOU Xuan-yi.Equivalent static wind loads of large-span roof structures [J].Journal of Building Structures,2007,28(1):125-129.
[15] BUDIANSKY B,ROTH R S.Axisymmetric dynamic buckling of clamped shallow spherical shells [C]// Collected Papers on Instability of Shells Structures,NASA TND-1510,Washington D C,1962:597-606.
[16] HSU C S.On dynamic stability of elastic bodies with prescribed initial condition [J].International Journal of Engineering Science,1966,4(1):1-21.