单层平面索网幕墙结构玻璃与索网协同工作的动力性能研究
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摘要
采用模型试验和理论分析的方法对单层平面索网玻璃幕墙结构玻璃与索协同工作的动力性能进行研究。首先通过结构自振特性试验研究玻璃对于索网结构频率、振型以及阻尼的影响,然后提出了动力荷载作用下玻璃与索网的协同工作机理,据此建立玻璃与索网协同工作的数值模型,采用该模型从理论上分析了结构的自振特性。理论分析和试验结果表明:玻璃的抗弯效应对结构第一阶模态影响较小,对结构的高阶模态影响比较明显;索网+玻璃结构的阻尼远大于索网的阻尼,玻璃幕墙结构的阻尼比主要是由玻璃提供的。
Model test and theoretical analysis were conducted to study the dynamic performance of cable net facade with consideration of glass panels.First the effects of glass panels on the natural frequencies,vibration modes and damping were investigated with dynamic characteristics test,then the working mechanism of glass panels in coordination with cable net was proposed,and accordingly a numerical model of glass panels in coordination with cable net was built for the dynamic analysis.The study indicates that: the bending stiffness of glass panels has little effect on the first vibration mode of cable net facade,while the effect on the high vibration modes is significant;the damping of the cable net with glass panels is much higher than that of the cable net alone,as is mainly decided by glass panels.
Model test and theoretical analysis were conducted to study the dynamic performance of cable net facade with consideration of glass panels.First the effects of glass panels on the natural frequencies,vibration modes and damping were investigated with dynamic characteristics test,then the working mechanism of glass panels in coordination with cable net was proposed,and accordingly a numerical model of glass panels in coordination with cable net was built for the dynamic analysis.The study indicates that: the bending stiffness of glass panels has little effect on the first vibration mode of cable net facade,while the effect on the high vibration modes is significant;the damping of the cable net with glass panels is much higher than that of the cable net alone,as is mainly decided by glass panels.
引文
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[9]冯若强,武岳,沈世钊.考虑玻璃参与工作的单层平面索网幕墙结构静力性能研究[J].建筑结构学报,2005,26(4):99-106(Feng Ruoqiang,Wu Yue,Shen Shizhao.Staticperformance of single-layer plane cable net glass curtain inconsideration of glass panel[J].Journal of BulidingStructure,2005,26(4):99-106(in Chinese))
[10]曹资,薛素铎,刘景园,等.索网屋盖结构阻尼特性试验研究[J].地震工程与工程振动,1995,15(2):92-99(Cao Zhi,Xue Suduo,Liu Jingyuan,et al.An experimental study ondamping behavior of cable network roofs[J].EarthquakeEngineering and Engineering Vibration,1995,15(2):92-99(in Chinese))
[2]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(Feng Ruoqiang.Static anddynamic performance of cable net facade[D].Harbin:HarbinInstitute of Technology,2006(in Chinese))
[3]石永久,吴丽丽,王元清,等.点支承玻璃建筑单层索网柔性支承体系及其工程应用[J].工业建筑,2005,35(2):1-5(Shi Yongjiu,Wu Lili,Wang Yuanqing,et al.Flexible-supported system of single-layer cable mesh for point-supported glass cladding and its engineering application[J].Industrial Construction,2005,35(2):1-5(in Chinese))
[4]Schlaich J,Schober H,Moschner T.Prestressed cable netfacades[J].Structural Engineering International,2005,15(1):36-39
[5]Feng Ruoqiang,Wu Yue,Shen Shizhao.Simplified calculationmethod of nonlinear frequency of cable net under mean windload[J].Acta Mechanica Solida Sinica,2006,19(3):248-254
[6]冯若强,武岳,沈世钊.单层平面索网幕墙结构的风激动力性能研究[J].哈尔滨工业大学学报,2006,38(2):153-156(Feng Ruoqiang,Wu Yue,Shen Shizhao.Wind-induceddynamic performance of cable net glazing[J].Journal ofHarbin Institute of Technology,2006,38(2):153-156(inChinese))
[7]Feng Ruoqiang,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
[8]冯若强,武岳,沈世钊.单索幕墙体系中的玻璃与索协同工作机理研究[J].西安建筑科技大学学报,2006,38(5):619-623(Feng Ruoqiang,Wu Yue,Shen Shizhao.Study onmechanism of glass panels working in cooperation withsingle-layer cable net glass curtain[J].Journal of Xi’anUniversity Architecture and Technology,2006,38(5):619-623(in Chinese))
[9]冯若强,武岳,沈世钊.考虑玻璃参与工作的单层平面索网幕墙结构静力性能研究[J].建筑结构学报,2005,26(4):99-106(Feng Ruoqiang,Wu Yue,Shen Shizhao.Staticperformance of single-layer plane cable net glass curtain inconsideration of glass panel[J].Journal of BulidingStructure,2005,26(4):99-106(in Chinese))
[10]曹资,薛素铎,刘景园,等.索网屋盖结构阻尼特性试验研究[J].地震工程与工程振动,1995,15(2):92-99(Cao Zhi,Xue Suduo,Liu Jingyuan,et al.An experimental study ondamping behavior of cable network roofs[J].EarthquakeEngineering and Engineering Vibration,1995,15(2):92-99(in Chinese))
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